Non-isolated Buck APFC LED Driver

Description

The FC2338 is a high precision non-isolated buck

driver with active PFC, specially designed for high

mains 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 FC2338 integrates a 600V power MOSFET.

With few external components, the LED output

current can be precisely controlled.

The FC2338

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 FC2338 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 FC2338 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



±3% LED Output Current Accuracy



Excellent Line and Load Regulation



Critical Conduction Mode Operation



Ultra Low (300uA) Operating Current



LED Short Protection



LED Open Protection (OVP)



Current Sensing Resistor Open Protection



Cycle by Cycle Current Limit



VCC Under Voltage Protection



Auto Fault Recovery



Thermal Regulation Function

Applications



LED retrofit lamps, Bulb, Spot Light, GU10/E27



LED PAR30, PAR38 Lamp



LED tube, LED String



Other LED Lighting

SEMICONDUCTOR

TECHNICAL DATA

FC2338

2019. 10. 02

1/9

Revision No : 0