GENERAL DESCRIPTION
OB5622x is a high current precision, non-isolated power switch with HV startup for LED lighting application. It works under transition mode.
It simplifies the LED lighting system design by eliminating the auxiliary winding inductance and HV startup resistor. A 500V power switch is integrated in OB5622x. LED current can be adjusted by the external sense resistor connected between CS pin and ground.
OB5622x offers comprehensive protection coverage with auto-recovery features including cycle-by-cycle current limiting, built-in leading edge blanking, over voltage protection (OVP) and thermal fold back function to avoid device damage at extreme case.
OB5622x is offered in SOP7 package.
FEATURES
HV startup
Sense and supply without auxiliary winding inductance
Low System Cost and High Efficiency
Low operation current
Transition mode operation
Cycle-by-Cycle Current Limiting
Built-in Leading Edge Blanking (LEB)
Over voltage protection (OVP)
Thermal fold back current control
APPLICATIONS
LED lighting