OB2212 Datasheet PDF (Primary-Side Regulation PWM Power Switch)

OB2212 - Primary-Side Regulation PWM Power Switch

This page provides the datasheet information for the OB2212, a member of the OB2211-On Primary-Side Regulation PWM Power Switch family.

Description

OB2211/OB2212 is an offline PWM Power switch for low power AC/DC charger and adaptor applications.

It operates in primary-side sensing and regulation.

Consequently, opto-coupler and TL431 could be eliminated from design.

Features

including Cycle-by-Cycle current limiting, VDD over-voltage clamp and UVLO, fail-safe protection for open loop fault condition. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output with No-Y cap design.

Datasheet Details

Part number	OB2212
Manufacturer	On-Bright
File Size	330.00 KB
Description	Primary-Side Regulation PWM Power Switch
Datasheet	OB2212 Datasheet
Additional preview pages of the OB2212 datasheet.

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Full PDF Text Transcription

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OB2211/OB2212 Primary-Side Regulation PWM Power Switch GENERAL DESCRIPTION OB2211/OB2212 is an offline PWM Power switch for low power AC/DC charger and adaptor applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated from design. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. Device operates in fixed frequency mode at large load conditions, frequency reduction mode at light/medium load and ‘Extended burst mode’ at No/light load conditions.

Published: Oct 14, 2014 |