SD6901STR Datasheet PDF - SILAN MICROELECTRONICS

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SD6901STR
SILAN MICROELECTRONICS

Part Number SD6901STR
Description NON-ISOLATED LED LIGHTING DRIVE IC
Page 7 Pages


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SD690XS_Datasheet
NON-ISOLATED LED LIGHTING DRIVE IC WITH BUILT-IN HIGH-VOLTAGE
MOSFET, HIGH PFC AND HIGH CONSTANT CURRENT ACCURACY
DESCRIPTION
SD690XS is designed for non-isolated LED driving with floating
Buck structure and built-in 600V MOSFET. With this structure,
inductor current is sensed and closed-loop is formed with the
internal error amplifier for high constant current accuracy and
high input/output regulation rate. Also, high PF in full range is
available as its own PFC control. Boundary Conduction mode is
adopted for decreasing switching loss and improving the
conversion efficiency.
SD690XS integrates various protections, such as output open
circuit protection, output short circuit protection, cycle-by-cycle
current limit protection, over temperature protection and VCC
over voltage protection.
The start-up current and operating current are low and highlight APPLICATION
LED can be driven with high efficiency in full range
(85VAC~265VAC).
Bulb Lamp
T5/T8 LED Lamp
FEATURES
Various LED Lighting
Proprietary constant control method (Patent)
Built-in 600V MOSFET
Constant current with high accuracy for LED (<±3%)
PF>0.9 in full voltage range
Boundary-Conduction mode
LED short circuit protection (Patent)
LED open circuit protection
VCC over/under voltage protection
Over temperature protection
Over current protection
ORDERING INFORMATION
Part No.
SD6901STR
SD6902STR
SD6904STR
Package
SOP-7-225-1.27
SOP-7-225-1.27
SOP-7-225-1.27
Marking
SD6901S
SD6902S
SD6904S
Material
Halogen free
Halogen free
Halogen free
Packing
Tape&Reel
Tape&Reel
Tape&Reel
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:0.4
2013.04.07
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Silan
Microelectronics
SD690XS_Datasheet
BLOCK DIAGRAM
ZCD
4
ZCD
control
VCC OVP
50us
Debounce
OTP
Logic
control
S
Q
R
1
VCC
Undervoltage UVLO
lockout
22V
Internal VREF5.5V
bias
DRAIN 5/6
DRV
CS
2
Polarity
conversion
CS reference
Gm
amplifier
TON
comparator
COMP
3
GND
7
ABSOLUTE MAXIMUM RATINGS
Characteristics
Symbol
Supply voltage
Feedback voltage
Sample voltage
COMP voltage
DRAIN voltage
Junction temperature
Range
VCC
VZCD
VCS
VCOMP
VDRAIN
Tj
Storage
Range
temperature
TS
Rating
-0.3~22
-0.3~6.5
-6.5~6.5
-0.3~6.5
-0.3~600
-40~125
-65~150
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VCC=16V, Tamb=25°C)
Characteristics
Operating voltage
UVLO VH
UVLO VL
VCC OVP
Start-up current
Quiescent current
Symbol
VCC
UVLOH
UVLOL
VCCOVP
ISTART
IVCC
Test condition
After start
Before start, VCC=15V
No switching waveform
after start-up
Min.
10
15
7.5
20.5
0
800
Typ.
16
16
8.5
22
4
950
Max.
18
17
9.5
23
10
1100
Unit
V
V
V
V
V
°C
°C
Unit
V
V
V
V
μA
μA
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:0.4
2013.04.07
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Silan
Microelectronics
SD690XS_Datasheet
Characteristics
Voltage feedback
Symbol
ZCD OVP voltage
ZCDOVP
ZCD OVP delay
ZCD VL
ZCD VH
ZCD short circuit detect
voltage
Operational amplifier
ZCDSL
Input reference voltage of
transconductance
Amplifier
CSREF
Transconductance of
transconductance
Gm
Amplifier
COMP high clamp
voltage
CS peak protection
voltage
Time parameter
Max. on time
Min. on time
Max. off time
Min. off time
Max. switching frequency
High-voltage MOSFET
TON,MAX
TON,MIN
TOFF,MAX
TOFF,MIN
FMAX
On
resistance
SD6901S
SD6902S
SD6904S
RDSON
RDSON
RDSON
Drain-Source voltage
VDS
Temperature characteristics
Over temperature
protection threshold value
TSD
Over temperature
protection release point
Test condition
Increase ZCD to the
threshold value
VCOMP=3.5V
VCOMP=0V
VCC=16V
VCC=16V
VCC=16V
ID=50uA
Min.
Typ.
Max.
Unit
4.1 4.25 4.4
-- 900 --
-- 0.1 --
-- 0.3 --
0.35 0.5 0.65
V
ns
V
V
V
165 170 175
mV
-- 270 --
-- 3.5 --
-- 1000 --
-- 33 --
-- 0.4 --
-- 38 --
-- 3.2 --
-- 120 --
-- 10 --
-- 4 --
-- 2 --
-- 600 --
-- 150 --
-- 130 --
μA/V
V
mV
μs
μs
μs
μs
KHz
Ω
Ω
Ω
V
°C
°C
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:0.4
2013.04.07
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Silan
Microelectronics
PIN CONFIGURATIONS
SD690XS_Datasheet
1 VCC
2 CS
GND 7
3 COMP DRAIN 6
4 ZCD
DRAIN 5
PIN DESCRIPTION
Pin No.
1
2
Pin Name
VCC
CS
3 COMP
4 ZCD
5,6 DRAIN
7 GND
I/O
POWER
I/O
O
I
O
GND
Description
Power supply
current sense pin
Output of trans-conductance amplifier, connected to GND through a
capacitor
Inductor current zero-crossing detection pin
Drain output
Ground pin
FUNCTION DESCRIPTION
SD690XS is a non-isolated LED driver IC adopting BUCK structure. The function is described below.
Start control
Fast start-up is achieved due to very low start-up current. Large resistor can be used for external start-up
resistor. It features undervoltage protection at VCC and the on/off threshold values are 16V and 8.5V.
Hysteresis characteristics guarantees that IC can be powered by input capacitor during start-up. When the
output voltage increases to a certain value after start, VCC will be charged by output through auxiliary
winding or Zener Diode. Vz=VLED-VCC.
Boundary-conduction mode
Power MOSFET is turned on by inductor current zero-crossing detection. The zero-crossing of current can
be detected by ZCD voltage which can be measured through auxiliary winding or resistance voltage divider.
When inductor current is zero crossing, voltage at pin ZCD drops rapidly, IC detects the falling edge and
turns on Power MOSFET. Boundary-conduction mode provides low turn-on switching losses and high
conversion efficiency.
Constant current accuracy control
IC senses the whole inductor current and forms the closed-loop with internal error amplifier to obtain high
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:0.4
2013.04.07
Page 4 of 7



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SD6901STR NON-ISOLATED LED LIGHTING DRIVE IC SD6901STR
SILAN MICROELECTRONICS
SD6901STR pdf

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