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.

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