OB2203 Datasheet PDF - On-Bright Electronics Quasi-Resonant Flyback PWM Controller Specs

OB2203 - Quasi-Resonant Flyback PWM Controller

This page provides the datasheet information for the OB2203, a member of the OB2203_On Quasi-Resonant Flyback PWM Controller family.

Datasheet Summary

Description

OB2203 is a highly integrated Quasi-Resonant (QR) controller optimized for high performance offline flyback converter applications.

At normal load condition, it operates in QR mode with minimum drain voltage switching.

Features

Multi-Mode Operation.
Quasi-Resonant Operation at Normal Loading.
Pulse Frequency Modulation (PFM) Operation at Light Load.
Burst Mode at No Load.
Direct Control of the Power Supply of PFC Controller for Improved Standby Power at No/Light Load.
40KHz Minimum Frequency Limit at QR Mode.
130KHz Maximum Frequency Limit.
Internal Minimum T_off for Ringing Suppression.
45us Maximum On Time Limit.
Adaptive Slope Compensation.
Internal Leading Edg.

Datasheet Details

Part number	OB2203
Manufacturer	On-Bright Electronics
File Size	424.46 KB
Description	Quasi-Resonant Flyback PWM Controller
Datasheet	OB2203 Datasheet
Additional preview pages of the OB2203 datasheet.

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Full PDF Text Transcription

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OB2203 Quasi-Resonant Flyback PWM Controller GENERAL DESCRIPTION OB2203 is a highly integrated Quasi-Resonant (QR) controller optimized for high performance offline flyback converter applications. At normal load condition, it operates in QR mode with minimum drain voltage switching. To meet the CISPR-22 EMI starting at 150KHz, the maximum switching frequency is internally limited to 130KHz. It operates in PFM mode for high power conversion efficiency at light load condition. When the loading is very small, the IC operates in ‘Extended Burst Mode’ to minimize the switching loss. As a result, lower standby power consumption and higher conversion efficiency is achieved.

Published: Apr 2, 2010 |