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OB25111 - High Precision CC/CV Primary-Side PWM Power Switch

This page provides the datasheet information for the OB25111, a member of the OB25111-On High Precision CC/CV Primary-Side PWM Power Switch family.

Datasheet Summary

Description

OB2511x is a high performance offline PSR power switch for low power AC/DC charger and adapter applications.

It operates in primary-side sensing and regulation.

Consequently, opto-coupler and TL431 could be eliminated.

Features

  • including Cycle-by-Cycle current limiting, VDD over voltage protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), OTP etc. OB2511x is offered in CDFN8-7 package. Vo ±5% Io ICC Fig.1. Typical CC/CV Curve.

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Datasheet preview – OB25111

Datasheet Details

Part number OB25111
Manufacturer On-Bright Electronics
File Size 1.49 MB
Description High Precision CC/CV Primary-Side PWM Power Switch
Datasheet download datasheet OB25111 Datasheet
Additional preview pages of the OB25111 datasheet.

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Full PDF Text Transcription

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OB2511x High Precision CC/CV Primary-Side PWM Power Switch Controller GENERAL DESCRIPTION OB2511x is a high performance offline PSR power switch for low power AC/DC charger and adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. 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. In addition, good load regulation is achieved by the built-in cable drop compensation.
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