描述 Description

The BP2338J is a high precision non-isolated buck

driver with active PFC, specially designed for universal

input offline constant current LED lighting. The driver

with on-chip PFC circuit achieves high power factor

and low THD. Operating in critical conduction mode,

the power MOSFET switching loss is reduced and the

inductor is fully utilized.

The BP2338J integrates a 600V power MOSFET.

With few external components, the LED output

current can be precisely controlled.

The BP2338J utilizes patented floating ground

structure. The inductor current is sensed during the

whole switching cycle. So it achieves high precision

output current control, and excellent line regulation and

load regulation.

The BP2338J utilizes patented start up technology

with HV JFET. So it achieves fast start up, reduce

count of external components, and realize smaller

form factor.

The BP2338J offers rich protection functions to

improve the system reliability, including LED open

circuit protection, LED short circuit protection, VCC

under voltage protection, CS resistor open circuit

protection and cycle by cycle current limit. 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 over temperature.

特性 Features

? Fast start up and power supply with HV JFET

? Integrated with 600V Power MOSFET

? Active PFC for High Power Factor and Low THD

? System Efficiency up to 95

? ±3 LED Output Current Accuracy

? Excellent Line and Load Regulation

? Critical Conduction Mode Operation

? 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