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OB3639A - Low THD Offline LED Lighting Controller

This page provides the datasheet information for the OB3639A, a member of the OB3639A-On Low THD Offline LED Lighting Controller family.

Datasheet Summary

Description

OB3639A is an offline LED lighting controller with high power factor, low THD and high constant current (CC) precision.

It can achieve low system cost for an isolated lighting application by primary side control in a single stage converter.

Features

  • including programmable VIN foldback, programmable VIN OVP, programmable thermal foldback, LED open loop protection, LED short circuit protection, cycle-by-cycle current limiting, built-in leading edge blanking, VDD under voltage lockout (UVLO), etc. OB3639A is offered in SOP-8 package.

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Datasheet preview – OB3639A

Datasheet Details

Part number OB3639A
Manufacturer On-Bright
File Size 859.40 KB
Description Low THD Offline LED Lighting Controller
Datasheet download datasheet OB3639A Datasheet
Additional preview pages of the OB3639A datasheet.

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Full PDF Text Transcription

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OB3639A High PF, Low THD Offline LED Lighting Controller GENERAL DESCRIPTION OB3639A is an offline LED lighting controller with high power factor, low THD and high constant current (CC) precision. It can achieve low system cost for an isolated lighting application by primary side control in a single stage converter. It significantly simplifies the LED lighting system design by eliminating the secondary side feedback components and the opto-coupler. The proprietary CC control is used and the system can achieve high power factor with constant on-time control. Quasi-resonant (QR) operation and clamping frequency greatly improve the system efficiency. The advanced start-up technology is used to meet the start-up time requirement (<0.5s).
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