BD6583MUV-A (ROHM)
6-Channel White LED Driver

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Datasheet
6-Channel White LED Driver
for up to 72 LEDs
BD6583MUV-A
General Description
BD6583MUV-A is white LED driver IC with PWM
step-up DC/DC converter that can boost max 42.5V
and current driver that can drive max 25mA. The wide
and precision brightness can be controlled by external
PWM pulse. BD6583MUV-A has very accurate current
drivers, and it has few current errors between each
strings. So, it will be helpful to reduce brightness spots
on the LCD. Small package type is suited for saving
space.
Key Specifications
Operating power supply voltage range: 2.7V to 22.0V
LED Maximum Current:
25mA (Max.)
Quiescent Current 1:
0.6μA (Typ.)
Quiescent Current 2:
4.6μA (Typ.)
Operating temperature range:
-30 to +85
Package W(Typ.) x T(Typ.) x H(Max.)
Features
High efficiency PWM step-up DC/DC converter
(fsw=1MHz), max efficiency 93%
High accuracy & good matching (±3%) current
drivers 6ch
Drive up to 12* in series, 6 strings in parallel =72
white LEDs (*white LED Vf=3.5Vmax)
Rich safety functions
Over-voltage protection (OVP)
Over current limit
External SBD open detect
Thermal shutdown
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
Figure 1. Package
Applications
All middle size LCD equipments backlight of Notebook
PC, portable DVD player, car navigation systems, etc.
Typical Application Circuit
Battery
10μF
4.7μH
2.2μF
RTR020N05
100m
Power
ON/OFF
200Hz
PWM
1μF
SW
SENSP
FAILSEL VDET
SENSN
RSTB BD6583MUV-A
PWMPOW
PWMDRV
VBAT
VREG
LED1
LED2
LED3
LED4
LED5
GNDGNDGNDGNDTEST ISETHISETLLED6
24k
10LED x 6parallel
Each 20mA
Figure 2F. iTgyuprieca2l.ATpyppliiccaaltiAopnpCliciractuioitn Circuit
Product structure Silicon monolithic integrated circuit
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© 2012 ROHM Co., Ltd. All rights reserved.
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This product is not designed protection against radioactive rays
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Absolute Maximum Ratings (Ta=25 )
Parameter
Symbol
Terminal voltage 1
VMAX1
Terminal voltage 2
VMAX2
Ratings
7
25
Unit Condition
V
TEST,VREG,SENSP,SENSN,SW,RSTB,
PWMPOW,PWMDRV,FAILSEL,ISETH,ISETL
V LED1, LED2, LED3, LED4, LED5, LED6, VBAT
Terminal voltage 3
VMAX3
50.5
V
VDET
Power dissipation 1
Pd1 500 mW
*1
Power dissipation 2
Pd2 780 mW
*2
Power dissipation 3
Pd3
1510
mW
*3
Operating temperature range Topr
-30 to +85
-
Storage temperature range
Tstg
-55 to +150
-
(*1) Reduced 4.0mW/ With Ta>25 when not mounted on a heat radiation Board.
(*2) 1 layer (ROHM Standard board) has been mounted. Copper foil area 0mm2, When it’s used by more than Ta=25 , it’s reduced by 6.2mW/ .
(*3) 4 layer (JEDEC Compliant board) has been mounted.
Copper foil area 1layer 6.28mm2, Copper foil area 2 to 4layers 5655.04mm2, When it’s used by more than Ta=25 , it’s reduced by 12.1mW/ .
Recommended Operating Rating (Ta=-30 to +85 )
Parameter
Ratings
Symbol
Min. Typ. Max.
Power supply voltage
VBAT 2.7 12.0 22.0
Unit
V
Condition
Electrical Characteristics (Unless otherwise specified, VBAT=12V, RSTB=2.5V, Ta = +25
Parameter
Limits
Symbol
Unit
Min. Typ. Max.
[FAILSEL,PWMDRV Terminal]
Threshold voltage (Low)
VthL
0
- 0.2 V
)
Condition
Threshold voltage (High) 1
VthH1 1.4 - 5.0 V VBAT>5.0V
Threshold voltage (High) 2
VthH2 1.4
- VBAT V VBAT<5.0V
Terminal input current
[PWMPOW Terminal]
Iin - 8.3 14.0 µA Input=2.5V
Low input voltage range
PWML 0
- 0.2 V
High input voltage range1
PWMH1 1.4 - 5.0 V VBAT>5.0V
High input voltage range2
PWM pull down resistor
[RSTB Terminal]
Low input voltage range
PWMH2
PWMR
1.4
300
- VBAT V VBAT<5.0V
500 700 k
RSTBL 0
- 0.2 V
High input voltage range1
RSTBH1 2.25 2.5 5.0 V VBAT>5.0V
High input voltage range2
RSTBH2 2.25 2.5 VBAT V VBAT<5.0V
Current consumption
[Regulator]
VREG voltage
IRSTB
-
89 134 µA RSTB=2.5V, LED1-6=3V
VREG 4.0 5.0 6.0 V No load
Under voltage lock out
UVLO 2.05 2.25 2.65 V
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Electrical Characteristics - continued
(Unless otherwise specified, VBAT=12V, RSTB=2.5V, Ta = +25 )
Parameter
Limits
Symbol
Min. Typ. Max.
[Switching Regulator]
Quiescent current 1
Iq1 - 0.6 3.4
Quiescent current 2
Iq2 - 4.6 10
Current consumption
Idd - 3.4 5.1
LED control voltage
VLED 0.4 0.5 0.6
Over current limit voltage
Ocp 70 100 130
SBD open protect
Sop - - 0.1
Switching frequency
fSW 0.8 1.0 1.2
Duty cycle limit
Duty 92.5 95.0 99.0
Over voltage limit
Ovl 43.0 44.7 46.4
[Current driver]
LED maximum current
ILMAX
-
- 25
LED current accuracy
ILACCU -
- ±5
LED current matching
ILMAT
-
- ±3
ISET voltage
Iset 0.5 0.6 0.7
LED current limiter
ILOCP 35 60 90
LED terminal Over voltage protect LEDOVP 10.0
*1 This parameter is tested with dc measurement.
11.5
13.0
Unit Condition
µA RSTB=0V, VBAT=12V
µA RSTB=0V, VBAT=22V
mA VDET=0V,ISETH=24k
V
mV *1
V Detect voltage of VDET pin
MHz
% LED1-6=0.3V
V LED1-6=0.3V
mA
% ILED=16mA
%
Each LED current/Average (LED1- 6)
ILED=16mA
V
mA
Current limit value at ISET resistor 4.7ksetting
LED1, 2, 3, 4, 5, 6=0.5V
V RSTB=PWMDRV=2.5V
Pin Descriptions
PIN Name
In/Out
1 VDET
2 N.C.
3 GND
4 SW
5 SENSP
6 TEST
7 SENSN
8 GND
9 ISETH
10 ISETL
11 PWMDRV
12 LED1
13 LED2
14 LED3
15 GND
16 LED4
17 LED5
18 LED6
19 FAILSEL
20 GND
21 RSTB
22 VREG
23 PWMPOW
24 VBAT
- Thermal PAD
PIN number
In
-
-
Out
In
In
In
-
In
In
In
In
In
In
-
In
In
In
In
-
In
Out
In
In
-
Function
Detect input for SBD open and OVP
No connect pin
GND
Switching Tr drive terminal
+ Side Current sense terminal
TEST input (Pull down 100kto GND)
- Side Current sense terminal
GND
Resistor connection for
LED current setting at PWMDRV=H
Resistor connection for
LED current setting at PWMDRV=L
PWM input pin for power ON/OFF only driver
Current sink for LED1
Current sink for LED2
Current sink for LED3
GND
Current sink for LED4
Current sink for LED5
Current sink for LED6
Latch selectable pin of protect function
GND
Reset pin L :Reset H :Reset cancel
Regulator output / Internal power-supply
PWM input pin for power ON/OFF
Battery input
Heat radiation PAD of back side
Connect to GND
Terminal equivalent
circuit diagram
C
F
B
G
G
G
A
B
A
A
E
C
C
C
B
C
C
C
E
B
E
D
E
C
-
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Pin ESD Type
VBAT VREG
VBAT
Datasheet
PIN
GND
A
VBAT
PIN
B
VBAT
PIN
GND
C
PIN
GND
D
VBAT VREG
PIN
GND
5.5V
Clump
E
PIN
F
PIN
GND
G
Figure 3. I/O equivalent circuit diagram
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Block Diagram
Datasheet
RSTB
PW MPOW
FA ILS EL
SW
SE NSP
S ENS N
V BAT
VR EG
300k
500 k
REG
TSD
V IN detector
Internal P ower sup lly
S BD Open protect
+
-
UVLO
300 k
1M
S
QR
10 0K Curre nt
S en ce
over voltage protect +
-
C ontrol
se nce
PW Mcomp
-
+
+
ERRA MP-
-
-
-
-
-
+
O SC
T ES T
PW M DRV
ISE TH
IS ETL
LE D TERM INA L
D etec t
10 0k
30 0k
IS E T H
Resisto r driver
IS E T L
Resisto r driver
LED TE RM INA L
Over Voltag e P ro tect
PW MDRV=H
On
PW MDRV=L
On
+
-
Current Driver
G ND G ND G ND GN D
VDE T
LED 1
LE D2
LED 3
LE D4
LE D5
LE D6
Pin number 23pin
Figure 4. Block diagram
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Typical Performance Curves
25 85
-30
Datasheet
85
85
25
25-30
-30
Figure 5. Current Consumption vs VBAT
Figure 6. Quiescent current vs VBAT
25
25
-30
-30
85
85
Figure 7. Oscillation frequency vs VBAT
2.3
2.28
2.26
2.24
2.22
2.2
-30
25
Ta [oC]
80
Figure 8. UVLO vs Temperature
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Typical Performance Curves - Continued
Datasheet
6V 12V 16V
Figure 9. Efficiency vs PWMPOW-HI Duty
ISETH=24k, PWM=200Hz
100%
95%
90%
85%
80%
6V 12V 16V
75%
70%
65%
60%
0 10 20 30 40 50 60 70 80 90 100
Duty [%]
Figure 10. Efficiency vs PWMDRV-HI
Duty
16V
12V
6V
16V
12V
6V
Figure 11. LED current vs PWMDRV-HI
Duty
PWM = 200Hz
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Figure 12. LED current vs PWMDRV-HI Duty
( Expansion) PWM = 200Hz
TSZ02201-0G3G0C400180-1-2
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Typical Performance Curves - Continued
Datasheet
1kHz
200Hz
10kHz
Figure 13. LED current vs PWMDRV-HI Duty
PWM = 200Hz, 1kHz,10kHz
20
18
16
14 16V
12V
12 6V
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Duty [%]
Figure 15. LED current vs PWMPOW-HI Duty
TPWM = 200Hz
1.0
0.9
0.8
0.7
16V
0.6 12V
6V
0.5
0.4
0.3
0.2
0.1
0.0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Duty (%)
Figure 15. LED current vs PWMPOW-HI Duty
( Expansion) PWM = 200Hz
Figure 16. LED current vs PWMPOW-HI Duty
PWM = 200Hz, 1kHz,10kHz
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Typical Performance Curves - Continued
Datasheet
Figure 17. LED current matching vs
PWMDRV-HI Duty
PWM = 200Hz
Figure 18. LED current matching vs
PWMDRV-HI Duty
(Expansion) PWM = 200Hz
Figure 19. VOUT response
Driver Control PWM (PWMDRV)
Figure 20. LED current matching vs
PWMPOW-HI Duty PWM = 200Hz
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Typical Performance Curves - Continued
Datasheet
Figure 21. LED current matching vs
PWMPOW-HI Duty
(Expansion) PWM = 200Hz
16.30
16.25
16.20
16.15
16.10
16.05
16.00
15.95
15.90
15.85
15.80
15.75
15.70
-30
5V
7V
12V
22V
2.7V
-10 10 30 50 70
temp [ ]
Figure 23. LED current vs Temperature
PWMDRV=H, ISETH=30k
(16mA setting)
Figure 22. VOUT response
Power Control PWM (PWMPOW)
Figure 24. Line Transient (10V to 22V)
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Typical Performance Curves - Continued
Datasheet
Figure 25. Line Transient (22V to 10V)
Figure 26. VOUT@OVP(LED OPEN)
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Application example
Battery
10μF
4.7μH
2.2μF *
RTR020N05
100m
Power
ON/OFF
200Hz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
10LED x 6parallel
Each 20mA
Datasheet
Battery
10μF
4.7μH
2.2μF *
RTR020N05
150m
Power
ON/OFF
200Hz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
P W MDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
10LED x 4aprallel
Each 20mA
Figure 27. 10 series × 6parallel
H current 20mA setting
Current driver PWM application
Figure 28. 10 series × 4parallel
H current 20mA setting
Current driver PWM application
* Please select the capacitor which the little bias fluctuation.
Battery
Battery
10μF
4.7μH
2.2μF *
RTR020N05
100m
Power
ON/OFF
200Hz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
10LED x 6parallel
Each 20mA
10μF
4.7μH
2.2μF *
RTR020N05
100m
Power
ON/OFF
200Hz
PWM
2.7V to 5.5V
1μF
SW
SENSP
SENSN
FAILSEL VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
10LED x 6parallel
Each 20mA
Figure 29. 10 series × 6parallel LED
current 20mA setting Power control PWM application
Figure 30. Non-used Inside REG or operating
under 5V application
* Please select the capacitor which the little bias fluctuation.
Terminal processing
TEST pin= Connect to GND
N.C. = Nothing specified in particular. Open is recommended.
VREG= When IC is driving from the outside of 2.7 to 5.5V, short VBAT and VREG, and put the voltage to VREG
FAILSEL, PWMDRV= Connect to GND in case of fixing at L level. Connect to VREG of IC or the power supply of more
than 1.4V in case of fixing at H level .
LED1-6= When each LED driver are not used, connect to GND of IC
GND = Each GND is connecting inside IC, but, connect to GND of all board
RSTB= RSTB is used as a power supply of internal circuit.
So, you mustn’t input RSTB voltage with pull up resistor of several k.
And, please care about the relation between VBAT and RSTB enough. (ref. P16)
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Description of Functions
1) PWM current mode DC/DC converter
While BD6583MUV-A is power ON, the lowest voltage of LED1, 2, 3, 4, 5, 6 is detected, PWM duty is decided to be
0.5Vand output voltage is kept invariably. As for the inputs of the PWM comparator as the feature of the PWM current
mode, one is overlapped with error components from the error amplifier, and the other is overlapped with a current sense
signal that controls the inductor current into Slope waveform to prevent sub harmonic oscillation. This output controls
external Nch Tr via the RS latch. In the period where external Nch Tr gate is ON, energy is accumulated in the external
inductor, and in the period where external Nch Tr gate is OFF, energy is transferred to the output capacitor via external
SBD.BD6583MUV-A has many safety functions, and their detection signals stop switching operation at once.
2) Soft start
BD6583MUV-A has soft start function.
The soft start function prevents large coil current.
Rush current at turning on is prevented by the soft start function.
After RSTB is changed LH, when PWMPOW is changed LH, soft start becomes effective for within 1ms and soft
start doesn't become effective even if PWMPOW is changed LH after that.
And, when the H section of PWMPOW is within 1ms, soft start becomes invalid when PWMPOW is input to H more than
three times. The invalid of the soft start can be canceled by making RSTB L.
3) FAILSEL pin
When the error condition occurs, boost operating is stopped by the protection function, and the error condition is avoided.
On that occasion, the way to stop of boost operating by the protection function can be selected with FAILSEL pin. Details
are as shown in Figure 31, 32.
After power ON, when the protection function is operating under about 1ms have passed, the stop state of the boost
operating can be held through FAILSEL is H, the stop state can reset through RSTB is L.
And, boost operating is stopped when the protection function is operating through FAILSEL is L, but when the protection
function becomes un-detect, boost operating is started again. It never keeps holding the stop state of boost operating.
In PWM control by PWMDRV can’t use this function.
When it is off over 10ms on PWM control by PWMPOW using this function, it may be stopped the boost
operating as over current protection work at off on PWMPOW=L.
Object of protect function is as shown below.
Over-voltage protection
External SBD open detect
Thermal shutdown
LED terminal over-voltage protection
Over current limit
<FAILSEL=H>
RSTB
about 1ms
FAILSEL “H” un-operating range
Protection
function
Boost off
operating
un-detection
detection
un-detection
normal operating
boost stop
<FAILSEL=L>
RSTB
FAILSEL
about 1ms
“L” un-operating range
Protection
function
un-detectio
Boost off
operating
normal operating
detection
un-detection
boost stop
normal
operating
off
off
< When it is off on PWMPOW>
normal operating
RSTB
PWMDRV
PWMPOW
Output
voltage
Coil current
FAILSEL
function
invalid
< When it is off on RSTB>
normal
RSTB
PWMDRV
PWMPOW
Output
voltage
Coil current
FAILSEL
function
invalid
valid
Figure 31. FAILSEL operating description
Figure 32. FAILSEL=H light off control
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
4) External SBD open detect and over voltage protection
BD6583MUV-A has over boost protection by external SBD open and over voltage protection. It detects VDET voltage
and is stopped output Tr in abnormal condition. Details are as shown below.
External SBD open detect
In the case of external SBD is not connected to IC, the coil or external Tr may be destructed. Therefore, at such an error
as VOUT becoming 0.1V or below, the Under Detector shown in the figure works, and turns off the output Tr, and
prevents the coil and the IC from being destructed.
And the IC changes from activation into non-activation, and current does not flow to the coil (0mA).
Over voltage protection
At such an error of output open as the output DC/DC and the LED is not connected to IC, the DC/DC will boost too much
and the VDET terminal exceed the absolute maximum ratings, and may destruct the IC. Therefore, when VDET
becomes sensing voltage or higher, the over voltage limit works, and turns off the output Tr, and the pressure up made
stop.
At this moment, the IC changes from activation into non-activation, and the output voltage goes down slowly. And, when
the output voltage becomes the hysteresis of the over voltage limit or below, the output voltage pressure up to sensing
voltage once again and unless the application error is recovered, this operation is repeated.
5) Thermal shut down
BD6583MUV-A has thermal shut down function.
The thermal shut down works at 175°C or higher, and the IC changes from activation into non-activation. Because
non-activation is different from RSTB=L, it doesn’t’ be reset inside IC. Moreover, even if thermal shut down function
works, soft start, FAILSEL, selection the number of LED lines of the current driver and starting current setting at
PWMDRV=L related RSTB are hold.
6) Over Current Limit
Over current flows the current detection resistor that is connected to switching transistor source and between GND,
SENSP pin voltage turns more than detection voltage, over current protection is operating and it is prevented from
flowing more than detection current by reducing ON duty of switching Tr without stopping boost.
As over current detector of BD6583MUV-A is detected peak current, current more than over current setting value does not flow.
And, over current value can decide freely by changing over current detection voltage.
<Derivation sequence of detection resistor>
Detection resistor =Over current detection voltage / Over current setting value
TYP value of over current detection voltage is 100mV, MIN = 70mV and MAX = 130mV and after the current value which
was necessary for the normal operation was decided, detection resistor is derived by using MIN value of over current
detection value.
For example, detection resistor when necessary current value was set at 1A is given as shown below.
Detection resistor =70mV / 1A = 70m
MAX current dispersion of this detection resistor value is
MAX current = 130mV / 70m= 1.86A
<The estimate of the current value which need for the normal operation>
As over current detector of BD6583MUV-A is detected the peak current, it have to estimate peak current to flow to the coil
by operating condition.
In case of, Supply voltage of coil = VIN
Inductance value of coil = L
Switching frequency = fsw MIN=0.8MHz, Typ=1MHz, MAX=1.2MHz
Output voltage = VOUT
Total LED current = IOUT
Average current of coil = Iave
Peak current of coil = Ipeak
Efficiency = eff (Please set up having margin, it refers to data on P.7)
ON time of switching transistor = Ton
Ipeak = (VIN / L) × (1 / fsw) × (1-(VIN / VOUT))
Iave=(VOUT × IOUT / VIN) / eff
Ton=(Iave × (1-VIN/VOUT) × (1/fsw) × (L/VIN) × 2)1/2
Each current is calculated.
As peak current varies according to whether there is the direct current superposed, the next is decided.
(1-VIN/VOUT) × (1/fsw) < Ton peak current = Ipeak /2 + Iave
(1-VIN/VOUT) × (1/fsw) > Ton peak current = Ipeak
(Example 1)
In case of, VIN=6.5V, L=4.7µH, fsw=1MHz, VOUT=39V, IOUT=80mA, Efficiency=85%
Ipeak = (6.0V / 4.7µH) × (1 / 1MHz) × (1-(6.0V / 39V)) =1.08A
Iave = (39V × 80mA / 6.0V) / 85% = 0.61A
Ton = (0.61A × (1-6.0V / 39V) × (1 / 1MHz) × ( 4.7µH /6.0V) × 2)1/2 = 0.90µs
(1-VIN/VOUT) × (1/fsw)=0.85µs < Ton
Peak current = 1.08A/2+0.61A = 1.15A
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
(Example 2)
In case of, VIN=12.0V, L=4.7µH, fsw=1MHz, VOUT=39V, IOUT=80mA, Efficiency=85%
Ipeak = (12.0V / 4.7µH) × (1 / 1MHz) × (1-(12V / 39V)) =1.77A
Iave = (39V × 80mA / 12.0V) / 85% = 0.31A
Ton = (0.31A × (1-12 V / 39V) × (1 / 1MHz) × ( 4.7µH /12 V) × 2)1/2 = 0.41µs
(1-VIN/VOUT) × (1/fsw)=0.69µs > Ton
Peak current = 12V/4.7µH × 0.41µs = 1.05A
*When too large current is set, output overshoot is caused, be careful enough because it is led to break down of the IC in
case of the worst.
Operating of the application deficiency
1) When 1 LED or 1parallel OPEN during the operating
In case of FAILSEL=L, the LED parallel which became OPEN isn't lighting, but other LED parallel is lighting.
At that time, output boosts up to the over voltage protection voltage 44.7V so that LED terminal may be 0V or it boost to
the output voltage that LED terminal voltage becomes LED terminal over voltage protection 11.5V or it becomes the
output voltage restricted by the over current limit.
In case of FAILSEL=H, boost stops when LED becomes OPEN and all LED turns off the lights.
2) When LED short-circuited in the plural
In case of FAILSEL=L, all LED is turned on unless LED terminal voltage is LED terminal over voltage protection of more
than 11.5V.
When it was more than 11.5V only the line which short-circuited is turned on normally and LED current of other lines fall
or turn off the lights. In case of FAILSEL=H, boost stops at more than 11.5V and all LED turns off the lights.
3) When Schottky diode came off
Regardless of FAILSEL, all LED isn't turned on. Also, IC and a switching transistor aren't destroyed because boost
operating stops by the Schottky diode coming off protected function.
4) When over current detection resistor came off
Regardless of FAILSEL, all LED isn't turned on. Because the resistance of 100kis between SENSP and SENSN
terminal, over current protection works instantly and LED current can't be flow.
Control signal input timing
VBAT
RSTB
2.7V 5V
2
1
3
Min. 100µs
5V
0V
V BAT
PWMPOW
PWMDRV
VREG
2 20
5V PIN
Rin
GND
DC/DC VOUT
Figure 33. Control signal timing
Figure 34. Voltage with a control sign higher than VBAT
Example corresponding to application of conditions
In case you input control signs, such as RSTB, PWMPOW, and PWMDRV, in the condition that the standup of supply
voltage (VBAT) is not completed, be careful of the following point.
Input each control signal after VBAT exceeds 2.7V.
Please do not input each control sign until VBAT exceeds H voltage of RSTB, PWMPOW, and PWMDRV.
When you input RSTB during the standup of VBAT and H voltage is inputted into PWMPOW, please give the standup
time to stable voltage as Min.100µs 2.7V of VBAT.
There is no timing limitation at each input signal of RSTB, PWMPOW and PWMDRV.
If each control sign changes into a condition lower than VBAT in (1) and (2), it goes via the ESD custody diode by the side
of VBAT of each terminal. A power supply is supplied to VBAT and there is a possibility of malfunctioning. Moreover, when
the entrance current to the terminal exceeds 50mA, it has possibility to damage the LSI. In order to avoid this condition, as
shown in the above figure, please insert about 220in a signal line, and apply current qualification. Please confirm an
internal pull down resistor in the block diagram and electrical property of P.5.
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
How to select the number of LED lines of the current driver
When the number of LED lines of the current driver is reduced, the un-select can be set the matter that the unnecessary
LED1 to 6 terminal is connected to GND. When it uses with 4 lines and so on, it can correspond to it by connecting 2
unnecessary lines to GND.
RSTB is used as a power supply of this decision circuit. The select of the terminal is judged, It has no relation to the logic of
PWMPOW and PWMDRV and it isn't judged an unnecessary LED line even if it is connected to GND when it is judged a
necessary terminal once. This information can be reset by setting RSTB at 0V.
Start control and select LED current driver
BD6583MUV-A can control the IC system by RSTB, and IC can power off compulsory by setting 0.2V or below. Also, It
powers on PWMPOW is at more than 1.4V and RSTB is at more than 2.25V.
When RSTB=PWMPOW=H, ISETH current is selected at PWMDRV=H and ISETL current is selected at PWMDRV=L.
The starting current in PWMDRV=L sets OFF second time rise of PWMDRV and it becomes 0mA setting after that.
After RSTB sets L once, the starting current can be flowed again by changing it to H.
RSTB
H
H
H
H
L
PWMPOW
L
H
L
H
L, H
PWMDRV
L
L
H
H
L, H
IC LED current
Off OFF
On Starting current decided with ISETL
Off OFF
On Current decided with ISETH
Off OFF
Attendance point of the restriction resistance input to RSTB
When the restriction resistance is input to RSTB, it is necessary to consider the input current of RSTB.
The input current of RSTB changes that depending on the power-supply voltage and the temperature reference to Figure
35.
Because the temperature characteristic of the input current is shown in Figure 35, please choose resistance for which the
voltage of the terminal can be guaranteed to 2.1V or more.
And, it has the margin in the decision of resistance, and please confirm and make sure it is no problem in a real application.
The decision example of restriction resistance
1.When use the current driver of 6 parallel
2.9V(to RSTB power-supply) - restriction resistance value × 124μA(100
restriction resistance value < (2.9-2.1)/124μA=6.45k
2.When use the current driver of 3 parallel
2.9V(to RSTB power-supply) - restriction resistance value × 430μA(100
restriction resistance value < (2.9-2.1)/430μA=1.86k
input current) > 2.1V
input current) > 2.1V
BD6583MUV-A
Power supply Limit resistor
for RSTB
RSTB input current
RSTB
terminal
Figure 35. RSTB input current
250 +100
+80
200 +25
-30
150
100
50
2.1 2.4 2.7 3 3.3 3.6
RSTB[V]
Figure 36. RSTB terminal voltage-RSTB input current
(At the time of the current driver 6 lines use)
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
In addition, the selection number of parallel number of the current driver is changed, the power-supply current of RSTB will
be increased. Because the maximum value of the consumption current at the RSTB=2.1V is indicated in the following Table
1, be careful enough when you calculate the restriction resistance.
Table1. The use parallel number of current driver at RSTB=2.1V , 100 vs. RSTB input current
Parallel numbers used for current driver
RSTB input current
6 0.12mA
5 0.23mA
4 0.33mA
3 0.43mA
2 0.53mA
1 0.63mA
0 0.74mA
Start to use PWMPOW terminal for the PWM control, PWM operating
After RSTB and PWMDRV is changing L H, input PWM to PWMPOW terminal.
There is no constraint in turn of RSTB and PWMDRV.
And, because it corresponds to PWM drive of shorter ON time than soft start time (1ms), when PWMPOW is input H more
than three times, the soft start is invalidated and it enable to correspond the high-speed drive. Until RSTB is set L,
invalidation of the soft start isn't canceled.
In case of lighting light off lighting, when it turns off the lights with PWM=L and It starts without soft start when it sets
PWM modulated light again.
But the peak current of the coil changes owing to discharge of output capacitor, It may flow to the over current limit value,
as follows Figure 37. Because soft start can be used when it turns off the lights with RSTB=L, The peak current of the coil
can be suppressed, as follows Figure 38 and this process of light off is recommended.
RSTB
PWMDRV
PWMPOW
Output Voltage
Current coil
Figure 37. Light off control of PWMPOW pin at PWM control on PWM=L
RSTB
PWMDRV
PWMPOW
Output Voltage
Current coil
Figure 38. Light off control of PWMPOW pin at PWM control on RSTB=L
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Start to use PWMDRV terminal for the PWM control, PWM operating
After RSTB and PWMPOW is changing L H, input PWM to PWMDRV terminal.
There is no constraint in turn of RSTB and PWMPOW.
When resistance is set as ISET, after RSTB and PWMPOW is changing L H as follows Figure 39, when it is not input
PWM to PWMDRV pin but input L, boost of DC/DC is unstable state because current driver doesn’t pass current.
The starting current is pulled from each LED terminal and pressure up operating is stabilized to escape from this state.
Also, the starting current can be set up by the resistance value connected to the ISETL terminal.
After starting, as the starting current in PWM brightness control become useless, the starting current is set up 0mA at the
second rise time of PWMDRV automatically as follows Figure 39.
In case of lighting light off lighting, when it turns off the lights with PWM=L and It starts without soft start because of
soft
start period was end when it sets PWM modulated light again.
But the peak current of the coil changes owing to discharge of output capacitor, It may flow to the over current limit value,
as follows Figure 40. Because soft start can be used when it turns off the lights with RSTB=L, The peak current of the coil
can be suppressed, as follows Figure 41 and this process of light off is recommended.
RSTB
PW MP OW
P WM DRV
L
H LH LHL
Output voltage
LED pin
Current driver of
starting current
ON OFF ON OFF
Figure 39. Off timing of starting current at PWMDRV=L
RS TB
PW MP OW
P WM DRV
Output Voltage
Current coil
Figure 40. Light off control of PWMDRV pin at PWM control on PWM=L
RSTB
PWMPOW
PWMDRV
Output Voltage
Current coil
Figure 41. Light off control of PWMDRV pin at PWM control on RSTB=L
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Brightness control
There are two dimming method is available, first method is analog dimming that apply analog voltage to ISET terminal, and
second method is PWM control via digital dimming of PWMPOW or PWMDRV. Because each method has the different
merit, please choose a suitable method for the application of use.
Two techniques can be used as digital dimming by the PWM control One is PWM control of current driver, the other is PWM
control of power control.
As these two characteristics are shown in the below, selects to PWM control process comply with application.
•Efficiency emphasis in the low brightness which has an influence with the battery life
control
•LED current dispersion emphasis in the PWM brightness control
control
2) Power control PWM
1) Current driver PWM
(Reference)
PWM regulation process
Current driver
Power control
Efficiency of LED current 0.5mA
(PWM Duty=2.5%)
70%
93%
PWM frequency 200Hz
Limit dispersion capability of low duty
0.2%
0.5%
1) Current driver PWM control is controlled by providing PWM signal to PWMDRV, as it is shown Figure 42.
The current set up with ISETH is chosen as the H section of PWMDRV and the current is off as the L section. Therefore, the
average LED current is increasing in proportion to duty cycle of PWMDRV signal. This method that it lets internal circuit and
DC/DC to work, because it becomes to switch the driver, the current tolerance is a few when the PWM brightness is
adjusted, it makes it possible to brightness control until 20µs (MIN0.4% at 200Hz). And, don't use for the brightness control,
because effect of ON/OFF changeover is big under 20µs ON time and under 20µs OFF time. There is no effect of ON/OFF
changeover at 0% and 100%, so there is no problem on use. Typical PWM frequency is 100Hz to 10kHz. When resistance is
set as ISET, RSTB sets H L, so the starting current may be effective, after RSTB sets L H, it becomes PWM of the
starting current and PWM of ISETH setting current to PWM two times.
PWMDRV
ON OFF
LED current
ON OFF
Coil current
ON OFF
IC’s active current
ON
Figure 42.
2) Power control PWM control is controlled by providing PWM signal to PWMPOW, as it is shown Figure 43. The current
setting set up with PWMDRV logic is chosen as the H section and the current is off as the L section. Therefore, the
average LED current is increasing in proportion to duty cycle of PWMPOW signal. This method is, because IC can be
power-off at off-time, the consumption current can be suppress, and the high efficiency can be available, so it makes it
possible to brightness control until 50µs (MIN1% at 200Hz). And, don't use for the brightness control, because effect of
power ON/OFF time changeover is big under 50µs ON time and under 50µs OFF time. There is no effect of ON/OFF
changeover at 0% and 100%, so there is no problem on use.
Typical PWM frequency is 100Hz to 1kHz. Also, PWM can't control RSTB and PWMPOW at the same time.
After RSTB sets H, control PWM only PWMPOW.
PWMPOW
ON OFF
LED current
ON OFF
Coil current
ON OFF
IC’s active current
ON OFF
Figure 43.
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
LED current setting range
LED current can set up Normal and Starting setting current.
LED current can set up Normal current by resistance value (RISETH) connecting to ISETH voltage and LED current can set
Starting current by resistance value (RISETL) connecting to ISETL voltage.
Setting of each LED current is given as shown below.
Normal current = 20mA (24k/RISETH)
Starting constant current = 0.6/RISET L
Also, Normal current setting range is 10mA to 25mA, Starting current setting range is OFF setting or 1µA to 100µA.
LED current can set OFF setting by open setting ISETL pin.
LED current becomes a leak current MAX 1µA at OFF setting.
ISETH Normal current setting example
RISETH
24k(E24)
25.5 k(E96)
27 k(E12)
28k(E96)
30k(E24)
33k(E6)
LED current
20mA
18.8mA
17.8mA
17.1mA
16.0mA
14.5mA
ISETL Starting current setting example
RISETL
6.2k(E24)
10k(E6)
47k(E6)
100 k(E6)
560 k(E12)
LED current
97µA
60µA
13µA
6µA
1.1µA
Connect to VREG pin
0mA
The separations of the IC Power supply and coil Power supply
This IC can work in separating the power source in both IC power supply and coil power supply. With this application, it can
obtain that decrease of IC power consumption, and the applied voltage exceeds IC rating 22V.
That application is shown in below Fig 44. The higher voltage source is applied to the power source of coil that is connected
from an adapter etc. Next, the IC power supply is connected with a different coil power supply. Under the conditions for
inputting from 2.7V to 5.5V into IC VBAT, please follow the recommend design in Fig 40. It connects VBAT terminal and
VREG terminal together at IC outside.
When the coil power supply is applied, it is no any problem even though IC power supply is the state of 0V. Although IC
power supply is set to 0V, pull-down resistance is arranged for the power off which cuts off the leak route from coil power
supply in IC inside, the leak route is cut off. And, there is no power on-off sequence of coil power supply and IC power
supply.
Coil Power supply
7V to 28V
Battery
10μF
4.7μH
2.2μ F
RTR02 0N05
100 m
Power
ON/OFF
200Hz
PWM
IC Power supply 2.7V to 5.5V
1μ F
SW
SE NS P
FA ILS EL
VDET
SEN SN
RSTB
PW M DRV
L ED1
PW MPOW
V BAT
L ED2
L ED3
L ED4
VRE G
LED5
GND GND GND GN D TEST ISETH ISETL LED6
24k
10LED x 6
20mA each
Figure 44. Application at the time of power supply isolation
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
The coil selection
The DC/DC is designed by more than 4.7µH. When L value sets to a lower value, it is possibility that the specific
sub-harmonic oscillation of current mode DC / DC will be happened.
Please do not let L value to 3.3µH or below.
And, L value increases, the phase margin of DC / DC becomes to zero. Please enlarge the output capacitor value when you
increase L value.
Example)
4.7µH
=
output capacitor 2.2µF/50V
1pcs
6.8µH
=
output capacitor 2.2µF/50V
2pcs
10µH
=
output capacitor 2.2µF/50V
3pcs
This value is just examples, please made sure the final judgment is under an enough evaluation.
Layout
In order to make the most of the performance of this IC, its layout pattern is very important. Characteristics such as
efficiency and ripple and the likes change greatly with layout patterns, which please note carefully.
to Power Supply
CIN
L
CBAT
PWM
Reset
CREG
to Cathode
of LED
to GND
SBD
COUT
VDET
N.C.
Tr
GND
L ED 6 LE D5 L ED 4 LE D3 LED 2
SW
RSENSE
S ENS P
TEST
LED6
LED5
LED4
GND
LED3
LED2
to Anode
of each LED
RISET
Figure 45. Layout
Connect the input bypath capacitor CIN(10µF) nearest to coil L, as shown in the upper diagram.
Wire the power supply line by the low resistance from CIN to VBAT pin. Thereby, the input voltage ripple of the IC can be
reduced. Connect smoothing capacitor CREG of the regulator nearest to between VREG and GND pin, as shown in the upper
diagram. Connect schottky barrier diode SBD of the regulator nearest to between coil L and switching transistor Tr.
And connect output capacitor COUT nearest to between CIN and GND pin. Thereby, the output voltage ripple of the IC can
be reduced.
Connect switching transistor Tr nearest to SW pin. Wire coil L and switching transistor Tr, current sensing resistor RSENSE by the
low resistance. Wiring to the SENSP pin isn't Tr side, but connect it from RSENSE side. Over current value may become low
when wiring from Tr side. Connect RSENSE of GND side isolated to SENS pin. Don’t wire between RSENSE and SNESN pin wiring
from RSENSE pin to GND pin. And RSENSE GND line must be wired directly to GND pin of output capacitor. It has the
possibility that restricts the current drive performance by the influence of the noise when other GND is connected to this GND.
Connect LED current setting resistor RISET nearest to ISETH pin. There is possibility to oscillate when capacity is added
to ISETH terminal, so pay attention that capacity isn't added. And, RISET of GND side must be wired directly to GND
pin.
When those pins are not connected directly near the chip, influence is given to the performance of BD6583MUV-A, and may
limit the current drive performance. As for the wire to the inductor, make its resistance component small so as to reduce electric
power consumption and increase the entire efficiency.
The layout pattern in consideration of these is shown in next page.
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Recommended layout pattern
BD6583MUV-A
Datasheet
CREG
CBAT
L
Tr
CIN
COUT
RISET
RSENSE
Figure 46. Frontal surface <Top view>
Figure 47. Rear surface <Top view>
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6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Selection of external parts
Recommended external parts are as shown below.
When to use other parts than these, select the following equivalent parts.
Coil
Value
4.7μH
4.7μH
4.7μH
Manufacturer
TOKO
TOKO
TOKO
Product number
A915AY-4R7M
B1015AS-4R7M
A1101AS-4R7M
Vertical
5.2
8.4
4.1
Size
Horizontal
5.2
8.3
4.1
Height (MAX)
3.0
4.0
1.2
DC current
(mA)
1870
3300
1400
DCR
()
0.045
0.038
0.115
4.7μH
TDK
LTF5022T-4R7N2R0
5.0
5.2
2.2
2000
0.073
4.7μH
TDK
VLP6810T-4R7M1R6
6.3
6.8
1.0
1600
0.167
10μH
TDK
VLP6810T-100M1R1
6.3
6.8
1.0
1100
0.350
Capacitor
Value Pressure Manufacturer Product number
Size
Vertical Horizontal
Height
TC
Cap
Tolerance
[ Supply voltage capacitor ]
10μF
10μF
4.7μF
4.7μF
25V
10V
25V
25V
MURATA
MURATA
MURATA
MURATA
GRM31CB31E106K
GRM219R61A106K
GRM319R61E475K
GRM21BR61E475K
3.2
2.0
3.2
2.0
1.6 1.6±0.2 B +/-10%
1.25 0.85±0.15 X5R +/-10%
1.6 0.85±0.1 X5R +/-10%
1.25 1.25±0.1 X5R +/-10%
[ Smoothing capacitor for built-in regulator ]
1μF 10V MURATA GRM188B10J105K
1.6
0.8 0.8±0.1 B +/-10%
[ Output capacitor ]
1μF 50V
MURATA GRM31MB31H105K
3.2
1.6
1.15±0.1
B
+/-10%
1μF
50V
MURATA GRM21BB31H105K
2.0
1.25 1.25±0.1
B
+/-10%
2.2μF
0.33μF
50V
50V
MURATA
MURATA
GRM31CB31H225K
GRM219B31H334K
3.2
2.0
1.6 1.6±0.2
1.25 0.85±0.1
B
B
+/-10%
+/-10%
Resistor
Value Tolerance Manufacturer
Product number
Size
Vertical Horizontal
Height
[ Resistor for LED current decision <ISETH pin> ]
30k
±0.5%
ROHM
MCR006YZPD3002
0.6
0.3 0.23
[ Resistor for over current decision <SENSP pin> ]
100m
±1%
ROHM
MCR10EZHFLR100
2.0
1.25 0.55
SBD
Pressure
Manufacturer
Product number
Size
Vertical Horizontal
Height
60V ROHM
RB160M-60
3.5 1.6 0.8
MOS FET Nch
Pressure
Manufacturer
Product number
Size
Vertical Horizontal
Height
Current Driving
ability voltage
45V ROHM
RTR020N05
2.8 2.9 1.0 2A 2.5V
60V ROHM
RSH065N06
6.0 5.0 1.75 6.5A 4.0V
The coil is the part that is most influential to efficiency. Select the coil whose direct current resistor (DCR) and current -
inductance characteristic is excellent. BD6583MUV-A is designed for the inductance value of 4.7µH. Don’t uses the
inductance value less than 2.2µH. Select a capacitor of ceramic type with excellent frequency and temperature
characteristics. Further, select Capacitor to be used with small direct current resistance, and pay sufficient attention to the
layout pattern shown in Page.21.
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Attention point of board layout
In board pattern design, the wiring of power supply line should be low Impedance, and put the bypass capacitor if necessary.
Especially the wiring impedance must be lower around the DC/DC converter.
About heat loss
In heat design, operate the DC/DC converter in the following condition.
(The following temperature is a guarantee temperature, so consider the margin.)
1. Periphery temperature Ta must be less than 85 .
2. The loss of IC must be less than dissipation Pd.
Application example
LED current setting controlled ISETH resistor.
19.6k: 24.5mA
24k: 20mA
30k: 16mA
33k: 14.5mA
Brightness control
Please input PWM pulse from PWMPOW or PWMDRV terminal.
Please refer electrical characteristic p.3 and function (p.12).
15inch panel
Battery
10μF
4.7μH
2.2μF *
10LED x 6 parallel
RTR020N05
47m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10 ~25mA
Figure 48. 10 series×6 parallel, LED current 20mA setting
Current driver PWM application
13 to 14inch panel
Battery
10μF
4.7μH
2.2μF *
8LED x 6 parallel
RTR020N05
51m
Power
ON/OFF
100Hz~1kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 49. 8 series× parallel, LED current 20mA setting
Power control PWM application;:n
Battery
10μF
4.7μH
2.2μF *
8LED x 6 parallel
RTR020N05
51m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 50. 8 series×6 parallel, LED current 20mA setting
Current driver PWM application
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TSZ22111 15 001
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TSZ02201-0G3G0C400180-1-2
03.Dec.2012 Rev.001


BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
LED current setting controlled ISETH resistor.
19.6k: 24.5mA
24k: 20mA
30k: 16mA
33k: 14.5mA
Brightness control
Please input PWM pulse from PWMPOW or PWMDRV terminal.
Please refer electrical characteristic page.3 and function (page.12).
10 to 12inch panel
Battery
10μF
4.7μH
2.2μF *
7LED x 6 parallel
RTR020N05
56m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
30k
Each 16mA
Can be set up to each 10~25mA
Battery
10μF
4.7μH
2.2μF *
10LED x4 parallel
RTR020N05
56m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 51. 7 series×6 parallel, LED current 16mA setting
Current driver PWM application
7inch panel
Battery
10μF
4.7μH
2.2μF *
8LED x 3 parallel
RTR020N05
68m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 52. 10 series×4 parallel, LED current 20mA setting
Current driver PWM application
Battery
10μF
4.7μH
2.2μF *
6LED x 4 parallel
RTR020N05
68m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 53. 8 series×3 parallel, LED current 20mA setting
Current driver PWM application
Figure 54. 6 series×4 parallel, LED current 20mA setting
Current driver PWM application
* Please select the capacitor which the little bias fluctuation.
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TSZ02201-0G3G0C400180-1-2
03.Dec.2012 Rev.001


BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
LED current setting controlled ISETH resistor.
19.6k: 24.5mA
24k: 20mA
30k: 16mA
33k: 14.5mA
Brightness control
Please input PWM pulse from PWMPOW or PWMDRV terminal.
Please refer electrical characteristic page.3 and function (page.12).
7inch panel
Battery
10μF
4.7μH
2.2μF *
4LED x 6 parallel
RTR020N05
68m
Power
ON/OFF
100Hz~1kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Battery
10μF
4.7μH
2.2μF *
8LED x 3 parallel
RTR020N05
68m
Power
ON/OFF
100Hz~1kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 40mA
Can be set up to each 20~50mA
Figure 55. 4 series×6 parallel, LED current 20mA setting
Power control PWM application
5inch panel
Battery
10μF
4.7μH
2.2μF *
8LED x 2 parallel
RTR020N05
82m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 56. 8 series×3 parallel, LED current 40mA setting
Power control PWM application
Battery
10μF
4.7μH
2.2μF *
8LED x 2 parallel
RTR020N05
82m
Power
ON/OFF
100Hz~1kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 40mA
Can be set up to each 20~50mA
Figure 57. 8 series×2 parallel, LED current 20mA setting
Current driver PWM application
Figure 58. 8 series×2 parallel, LED current 40mA setting
Power control PWM application
* Please select the capacitor which the little bias fluctuation.
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© 2012 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0G3G0C400180-1-2
03.Dec.2012 Rev.001


BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
LED current setting controlled ISETH resistor.
19.6k: 24.5mA
24k: 20mA
30k: 16mA
33k: 14.5mA
Brightness control
Please input PWM pulse from PWMPOW or PWMDRV terminal.
Please refer electrical characteristic page.3 and function (page.12).
5inch panel
Battery
10μF
4.7μH
2.2μF *
4LED x 4 parallel
RTR020N05
82m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Battery
10μF
4.7μH
2.2μF *
8LED x 2 parallel
RTR020N05
82m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 60mA
Can be set up to each 30~75mA
Figure 59. 4 series×4 parallel, LED current 20mA setting
Current driver PWM application
Figure 60. 8 series×2 parallel, LED current 60mA setting
Current driver PWM application
Battery
10μF
4.7μH
2.2μF *
3LED x 5 parallel
RTR020N05
82m
Power
ON/OFF
100Hz~1kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 61. 3 series×5 parallel, LED current 20mA setting
Power control PWM application
* Please select the capacitor which the little bias fluctuation.
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© 2012 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0G3G0C400180-1-2
03.Dec.2012 Rev.001


BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
LED current setting controlled ISETH resistor.
19.6k: 24.5mA
24k: 20mA
30k: 16mA
33k: 14.5mA
Brightness control
Please input PWM pulse from PWMPOW or PWMDRV terminal.
Please refer electrical characteristic page.3 and function (page.12).
For the application of 22V and more
Coil power supply
6~30V
Battery
10μF
4.7μH
2.2μF *
8LED x 6 parallel
RTR020N05
51m
Power
ON/OFF
200Hz
PWM
2.7~22V
IC
power
supply
1μF
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PW MDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 62.
For big current LED
Battery
10μF
4.7μH
2.2μF *
8LED x 1 parallel
RTR020N05
82m
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
120mA
Can be set up to 60~150mA
Figure 63.
The separation of less than an IC power supply 5V and the coil power supply
Coil power supply
6~30V
Battery
10μF
4.7μH
2.2μF *
10LED x 6 parallel
RTR020N05
51m
Power
ON/OFF
200Hz
PWM
2.7~5.5V
IC
power
supply
1μF
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PW MDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24k
Each 20mA
Can be set up to each 10~25mA
Figure 64.
* Please select the capacitor which the little bias fluctuation.
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Application example of Analog dimming
Control LED current to charged D/A voltage.
Show application example and typ control.
Please decide final value after you evaluated application, characteristic.
B atter y
10 μF
4 .7μH
2.2μF *
8LED x 6 parallel
RTR 020N05
51m
Power
ON/OFF
1 μF
SW
SE NSP
SE NS N
FAILSEL VDET
RSTB
P W MP OW
LE D1
PW MDRV
VB AT
LE D2
LE D3
LE D4
V REG
L ED5
GND GND GND GND TEST ISETH ISETL L ED6
470k
24k
Each 20m A
D/A
Figure 65. Analog style optical application
D/A
0.05V
0.2V
0.4V
0.5V
0.6V
0.7V
LED current
19.4mA
14.4mA
7.7mA
4.4mA
1.0mA
0mA
LED current =
ISET voltage ISET voltage -D/A
470k+
24k
×800
typ LED current =
0.6V
470k
+
0.6V-D/A
24k
×800
* Please select the capacitor which the little bias fluctuation.
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BD6583MUV-A (ROHM)
6-Channel White LED Driver

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BD6583MUV-A
Datasheet
Operational Notes
(1) Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can
break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any
special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety
measures including the use of fuses, etc.
(2) Operating conditions
These conditions represent a range within which characteristics can be provided approximately as expected. The
electrical characteristics are guaranteed under the conditions of each parameter.
(3) Reverse connection of power supply connector
The reverse connection of power supply connector can break down ICs. Take protective measures against the breakdown due
to the reverse connection, such as mounting an external diode between the power supply and the IC’s power supply
terminal.
(4) Power supply line
Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. In this regard,
for the digital block power supply and the analog block power supply, even though these power supplies has the same
level of potential, separate the power supply pattern for the digital block from that for the analog block, thus suppressing
the diffraction of digital noises to the analog block power supply resulting from impedance common to the wiring patterns.
For the GND line, give consideration to design the patterns in a similar manner.
Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal.
At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the capacitor to be
used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant.
(5) GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient.
(6) Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can
break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between
the terminal and the power supply or the GND terminal, the ICs can break down.
(7) Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
(8) Inspection with set PCB
On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress.
Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set
PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the
jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In
addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention
to the transportation and the storage of the set PCB.
(9) Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the
parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the
input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals
a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage
to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is
applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of
electrical characteristics.
(10) Ground wiring pattern
If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND
pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that
resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the
small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well.
(11) External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a
degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
(12) Thermal shutdown circuit (TSD)
When junction temperatures become 175°C (typ) or higher, the thermal shutdown circuit operates and turns a switch OFF.
The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is not aimed
at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit operating or use the
LSI assuming its operation.
(13) Thermal design
Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in
actual states of use.
(14) Selection of coil
Select the low DCR inductors to decrease power loss for DC/DC converter.
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BD6583MUV-A.pdf
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