OB3333 - Dimmable High PF/PSR LED Controller

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.

On-Bright

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Datasheet Details

Part number	OB3333
Manufacturer	On-Bright
File Size	715.21 KB
Description	Dimmable High PF/PSR LED Controller
Datasheet	OB3333 Datasheet
Additional preview pages of the OB3333 datasheet.

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Full PDF Text Transcription

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OB3333 Dimmable High PF, PSR LED Controller GENERAL 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.

Published: Nov 4, 2025 |