BP2327A Datasheet PDF - BPS


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BP2327A
BPS

Part Number BP2327A
Description Non-isolated Buck APFC LED Driver
Page 8 Pages

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BP2327A
Non-isolated Buck APFC LED Driver
Description
The BP2327A is a high precision non-isolated buck
APFC LED driver, specially designed for universal
mains with constant current control. The driver with
on-chip PFC circuit achieves high power factor, low
THD and high efficiency.
The BP2327A integrates a 650V power MOSFET,
utilizes patent pending floating ground structure, and
operates in Critical Conduction Mode. The switching
loss is reduced and the inductor is fully utilized. The
inductor current is sensed during the whole switching
cycle and limited cycle by cycle. With few external
components, it achieves high precision output
current, excellent line regulation and load regulation.
The BP2327A offers full of protection functions to
improve the system reliability, including LED load
open circuit protection, LED load short protection,
VCC under voltage protection, Current Sense
resistor open circuit protection, and over
temperature protection. All the protection functions
are auto-recovery. The system reliability is further
improved by the thermal regulation function. The
output current is reduced when the driver is in
condition of over temperature.
Features
Active PFC for High Power Factor and Low THD
Integrated with 650V Power MOSFET
System Efficiency up to 95%
±3% LED Output Current Accuracy
Excellent Line and Load Regulation
Critical Conduction Mode Operation
Ultra Low (33uA) Start Up Current
Ultra Low (300uA) Operating Current
LED Short/Open Protection
Current Sensing Resistor Open Protection
Cycle by Cycle Current Limit
VCC Under Voltage Protection
Auto Fault Recovery
Thermal Regulation Function
Available in SOP-8 Package
Applications
LED retrofit lamps, Bulb, Spot Light, GU10/E27
LED PAR30, PAR38 Lamp
LED tube, LED String
Other LED Lighting
Typical Application
AC
BP2327A
5 DRAIN
FB 4
6 DRAIN
CS 8
3 VCC
1 COMP
CS 7
GND 2
BP2327A_EN _DS_Rev.1.3
Figure 1. Typical application circuit for BP2327A
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Ordering Information
Part Number
Package
BP2327A
SOP8
BP2327A
Non-isolated Buck APFC LED Driver
Operating
Temperature
-40 to 105
Package Method
Tape
2,500 Piece/Roll
Marking
BP2327A
XXXXXY
WXYY
Pin Configuration and Marking Information
Pin Definition
Pin No.
Name
1 COMP
2 GND
3 VCC
4 FB
5,6 DRAIN
7,8 CS
COMP
GND
VCC
FB
CS
CS
DRAIN
DRAIN
Figure 2. Pin configuration
XXXXXY: Lot Code
W: Sign
X: Year
YY: Week
Description
Loop Compensation Node. This pin connects a capacitor to GND for
stabilization of the control loop, achieving accurate LED current, high
Power Factor and low THD.
Ground.
Power Supply Pin. Connect a bypass capacitor from this pin to GND.
Feedback Voltage detection Pin. This pin detects the inductor
demagnetization signal and the output voltage.
Internal HV Power MOSFET Drain.
Current Sense Pin. Connect a resistor to GND to sense the inductor
current.
BP2327A_EN _DS_Rev.1.3
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BP2327A
Non-isolated Buck APFC LED Driver
Absolute Maximum Ratings (note1)
Symbol
Parameters
Range
Units
VDS
ICC_MAX
COMP
Internal HV MOSFET Drain to Source voltage
VCC pin maximum sink current
Compensation pin voltage
-0.3~650
10
-0.3~6
V
mA
V
FB Feedback Voltage detection Pin
-0.3~6
V
CS Current sense pin
-0.3~6
V
PDMAX
θJA
TJ
TSTG
Power dissipation (note2)
Thermal resistance (Junction to Ambient)
Operating junction temperature
Storage temperature range
0.45
145
-40 to 150
-55 to 150
W
/W
ESD (note3)
2 KV
Note 1: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. Under “recommended operating
conditions” the device operation is assured, but some particular parameter may not be achieved. The electrical characteristics table defines the operation
range of the device, the electrical characteristics is assured on DC and AC voltage by test program. For the parameters without minimum and maximum value
in the EC table, the typical value defines the operation range, the accuracy is not guaranteed by spec.
Note 2: The maximum power dissipation decrease if temperature rise, it is decided by TJMAX, θJA, and environment temperature (TA). The maximum power
dissipation is the lower one between PDMAX = (TJMAX - TA)/ θJA and the number listed in the maximum table.
Note 3: Human Body mode, 100pF capacitor discharge on 1.5KΩ resistor
Recommended Operation Conditions
Symbol
VCC
ILED 1
ILED 2
Parameter
Power supply voltage
Output LED current @ Vout=72V
(Input voltage 176V265V)
Output LED current @ Vout=36V
(Input voltage 176V265V)
Range
8.5 ~ 20
< 240
< 330
Unit
V
mA
mA
BP2327A_EN _DS_Rev.1.3
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BP2327A
Non-isolated Buck APFC LED Driver
Electrical Characteristics (Notes 4, 5) (Unless otherwise specified, VCC=17V and TA =25 )
Symbol
Parameter
Conditions
Min Typ
Supply Voltage Section
VCC_ON
VCC Turn On Threshold
VCC Rising
17
VCC_UVLO
VCC Turn Off Threshold
VCC Falling
7.8
VCC_CLAMP
ICC_UVLO
ICC
VCC Clamp Voltage
VCC Startup Current
VCC Operating Current
VCC Rising,
VCC= VCC_ON - 1V
FOP=10kHz,
20
33
300
Feedback Section
VFB_FALL
FB Falling Edge
Threshold Voltage
VFB_HYS
FB Hysteresis Voltage
VFB_OVP
FB Over Voltage
Protection Threshold
TON_MAX
Maximum On Time
FB Falling
FB Rising
0.2
0.15
1.6
20
TOFF_MIN
Minimum Off Time
3
TOFF_MAX
Maximum Off Time
100
Current Sense Section
VCS_LIMIT
TLEB_CS
TDELAY
CS Peak Voltage Limitation
Leading Edge Blanking
Time for Current Sense
Switch off Delay Time
1.5
350
200
Compensation Section
VREF
VCOMP_LO
VCOMP
VCOMP_HI
Internal Reference Voltage
COMP Low Clamp
Voltage
COMP Linear Operating
Voltage Range
COMP High Clamp
Voltage
0.194 0.2
1.5
1.5
4.0
Max Units
V
V
V
50 uA
500 uA
V
V
V
us
us
us
V
ns
ns
0.206
V
V
3.9 V
V
BP2327A_EN _DS_Rev.1.3
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Bright Power Semiconductor Co. Confidential Customer Use Only
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