BP3122

High Precision PSR Constant Current LED Driver

BP3122_EN_DS_Rev.1.3

www.bpsemi.com

4

Bright Power Semiconductor Co. Confidential – Customer Use Only

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Supply Voltage Section

1mA

15

17

V

Turn on threshold voltage

13.8

V

Turn off threshold voltage

9

V

60

100

uA

150

250

uA

Current Sense Section

Threshold voltage for

peak current limit

485

500

515

mV

Leading edge blanking

time for current sense

500

ns

Switch off delay time

200

ns

Switching Frequency

Minimum working

frequency

5

kHz

LED open circuit

protection switching

frequency

90

kHz

Maximum Duty Cycle

Maximum duty cycle

42

%

MOSFET Section

Static drain-source

on-resistance

15

Ω

Drain-source breakdown

voltage

650

V

Drain-source leakage

current

10

uA

Over Temperature Protection

Thermal shutdown

threshold

150

℃

Thermal shutdown

hysteresis

25

℃

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