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OB2550 - High Precision CC/CV Primary-Side Controller

This page provides the datasheet information for the OB2550, a member of the OB2550-On High Precision CC/CV Primary-Side Controller family.

Datasheet Summary

Description

OB2550 is a high performance offline PSR controller 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, feedback loop open protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), OTP etc. OB2550 is offered in SOT23-6 package. Figure.1. Typical CC/CV Curve.

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Datasheet preview – OB2550

Datasheet Details

Part number OB2550
Manufacturer On-Bright Electronics
File Size 354.10 KB
Description High Precision CC/CV Primary-Side Controller
Datasheet download datasheet OB2550 Datasheet
Additional preview pages of the OB2550 datasheet.

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Full PDF Text Transcription

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OB2550 High Precision CC/CV Primary-Side Controller GENERAL DESCRIPTION OB2550 is a high performance offline PSR controller 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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