OB3333
DESCRIPTION
The OB3333 is a dimmable, high power factor, monolithic flyback controller with advanced features to provide high efficiency control and high accuracy constant current output for LED lighting applications.
OB3333 offers fast startup feature by charging VDD through the SW pin, a constant on-time control for power factor correction (PFC), zero current detector (ZCD) to ensure transition mode (TM) operation, an error amplifier for accurate current regulation and on-chip MOSFET for switching.
OB3333 offers a dimmable function, the LED current can be controlled by setting the duty cycle of PWM waveform into the DIM pin.
OB3333 offers prehensive protection coverage including VDD under voltage lockout (UVLO), VDD over voltage protection, load voltage over voltage protection, cycle-by-cycle current limiting, over temperature protection, LED string open/short protection, driver output clamping for external power MOSFET protection.
OB3333 is offered in SOP8 package.
FEATURES
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