OB3332A

GENERAL DESCRIPTION

OB3332Ax is a TRIAC dimmable high power factor, highly integrated buck/buck-boost regulator with advanced features to provide high efficiency control and high precision constant current output for dimmable LED lighting applications.

The proprietary CC control scheme is used to provide features of insensitivity to inductance and line voltage. Without external large compensation capacitor, the system can achieve high power factor with proprietary PFC control scheme.

OB3332Ax offers comprehensive protection coverage with auto-recovery features including LED open loop protection, LED short circuit protection, cycle-by-cycle current limiting, built-in leading edge blanking, VDD under voltage lockout (UVLO), thermal foldback etc.

OB3332Ax is offered in SOP-8 package.

FEATURES

n Excellent TRIAC dimming performance

n Low system cost and high efficiency

n High PF（PF>0.9）@90~132Vac input

n Support buck/buck-boost topology

n High precision constant current regulation at universal AC input

n Quasi-Resonant operation

n Thermal foldback function for LED output current control

n Insensitivity to inductance and line voltage variation

n LED short circuit protection

n LED open loop protection

n Cycle-by-cycle current limiting

n Built-in leading edge blanking (LEB)

n VDD under voltage lockout with hysteresis

n Over temperature protection (OTP)

 

APPLICATIONS

n Dimmable LED lighting

 

  

TYPICAL APPLICATION

 

 

Product	BVdss(V)	Condition	90Vac~132Vac
	Min		Open Frame
OB3332AMCP-H	650	ILED<80mA	6.2W
OB3332APCP-F	300	ILED<180mA	11.5W
OB3332APCP-J	500	ILED<180mA	11.5W
OB3332ARCP-F	300	ILED<220mA	12.2W
OB3332ARCP-J	500	ILED<220mA	12.2W
OB3332ATCP-J	500	ILED<220mA	15W
OB3332AUCP-F	300	ILED<280mA	15.5W