GENERAL DESCRIPTION

OB5628 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 OB5628. LED current can be adjusted by the external sense resistor connected between CS pin and ground.

OB5628 offers comprehensive protection coverage with auto-recovery features including   cycle-by-cycle current limiting, built-in leading edge blanking, over temperature protection (OTP), etc.

OB5628 is offered in SOP7/SOT23-5 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 temperature protection (OTP)

APPLICATIONS

LED lighting

TYPICALICAL APPLICATION