BP5131D

High Voltage Linear LED Driver

Description Features
BP5131D is a high current precision Linear LED  High integration，all SMTs in small size.
Driver ， integrated with High Voltage regulation  No ECAPs and magnetics
switchers and JFET supply, specially designed for  Integrated with 500V HV MOS, saved on
AC line LED strings forwarded with high voltage safety components.
 Fast startup
and low current.
 LED current set by external resistors with ±5%
In application, it supports a quite small BOM accuracy.
benefit from no ECAP and no Magnetics, compile  On chip thermal regulation.
 Compensation for line regulation
with EMI and safety standard.
 In TO252-3 package.
BP5131D can drive precision constant current by
option of an external resistor, and set up the LED
Application
strings in group linear compile with THD
performance. Typical 40mA LED current is  GU10/E27 LED retrofit lamps
optimized for 220V line voltage.  LED candle
 Other LED lighting

Typical Application

BP5131D
XXXXXY
XYYZ

AC D GND CS
1 2 3

RCS

Fig.1 BP5131D Typical Application

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High Voltage Linear LED Driver

Order Information

Part Number Package Temperature Packing Method Mark

Tape:2,500 pcs/reel BP5131D

BP5131DB TO252-3 -40 ℃to115 ℃ XXXXXY
2 reels/box XYYB
Tape:2,500 pcs/reel BP5131D
BP5131DC TO252-3 -40 ℃to125 ℃ XXXXXY
2 reels/box XYYC

BP5131D-XXXXXY-XYYZ

Package Lot code Year Week product category code

D:TO252-3 B:Tc=115℃
C:Tc=125℃

Pin mapping

BP5131D
XXXXXY
XYYZ

D GND CS
1 2 3

Fig 2 BP5131D Pin Mapping

Pin Descriptions
Pin No. Pin Name Descriptions

1 D Drain for LED string

2 GND IC ground

3 CS Current sense，connect the current sense resistor to GND

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High Voltage Linear LED Driver

Absolute Limit (Note1)

Symbol Parameter Range Unit

D 500V HV interface 500 V

ID_MAX Saturation current @ TJ_max 80 mA

CS Low voltage pins -0.3~6 V

PDMAX Power dissipation (note 2) 1.8 W

θJA Thermal Resistor 70 ℃/W

TJ Junction Temperature -40 to 155 ℃

TSTG Storage temperature range -55 to 150 ℃

ESD (Note 3) 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

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High Voltage Linear LED Driver

Electrical Characteristics (note4, 5) （unless specified, otherwise TA =25 ℃）

Symbol description Test condition Min. Typ. Max. UNIT

Operation Current

ICC Operation current D=30V 90 160 uA

Current Sense

VREF Ref. for string1 D=30V，Rcs=120Ω 600 mV

Thermal Regulation
Thermal
TREG BP5131DB 140 ℃
Regulation
Thermal
TREG BP5131DC 150 ℃
Regulation
Note 4: Production testing of the chip is performed at 25°C.

Note 5: The maximum and minimum parameters specified are guaranteed by test, the typical value are guaranteed by design, characterization and statistical

analysis

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High Voltage Linear LED Driver

Block Diagram

Drian

VDD JFET
HV Supply

MOS
LDO
REFERENCE Constant GT
Current

Thermal
&OTP

GND CS

Fig3 BP5131D Block Diagram

3 Current configuration
Application Information
BP5131D supports high precision LED current
BP5131D is designed for linear driving LED
set by external resistors.
strings with high forward voltage low LED current
in line condition. Current for LED string defined as：

1 Supply
Vref
I LED 
After system power on, the chip is supplied by Rcs
JEFT through D, starting work once voltage on D
As recommended, in application case of 220V
above 10V.
line condition, set the LED less than 40mA
2 Operation principle depend on thermal capability of heatsinking.

BP5131D auto adjust the LED strings in working 4 Thermal regulation

according to line voltage and extend the LED BP5131D has thermal regulation available on
working slots in every main cycles with purpose chip to balance the power delivering and
of output lm maintenance and LED availability temperature increasing. To improve the system
improvement. For different application, the reliability, the output current to be regulated lower
forward voltage should match the input voltage to down refer to the junction temperature.
obtain higher efficiency, like 110V and 220V
respectively.

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High Voltage Linear LED Driver
5 PCB Layout design

Suggestion for BP5131D PCB layout：

GND: Use the trace for current sense resistor as

short as possible. Extend the copper area for D
Pin to improve good thermal condition.

Heat sinking: BP5131D adopted TO252-3

package to strengthen the thermal dissipation, so
that extend thermal pad for further.

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High Voltage Linear LED Driver

Package

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