USR3651S Datasheet PDF - Unisonic Technologies HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH Specs

USR3651S - HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH

Datasheet Summary

Description

The UTC USR3651S is a primary control switch mode charger and adapter applications.

The controlled variable is transferred by an auxiliary winding from the secondary to the primary side.

Features

S.
High Voltage startup circuit.
Built-in 650V Power MOSFET.
±5% constant voltage regulation at universal AC input.
High precision constant current regulation at universal AC input.
Primary side control without TL431 and opto-coupler.
Programmable CV and CC regulation.
Programmable cable compensation in CV mode.
Flyback topology in DCM operation.
Frequency hopping to reduce system EMI.
Built-in leading edge blanking.
Built-in primary windin.

Datasheet Details

Part number	USR3651S
Manufacturer	Unisonic Technologies
File Size	457.74 KB
Description	HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH
Datasheet	USR3651S Datasheet
Additional preview pages of the USR3651S datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD USR3651S HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH CMOS IC  DESCRIPTION The UTC USR3651S is a primary control switch mode charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device integrates PWM controller to enhance the performance of discontinuous conduction mode (DCM) flyback converters. The UTC USR3651S operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It also provides off-time modulation to linearly decrease PWM frequency under light-load conditions so that low standby power can be achieved. The UTC USR3651S achieves high precision CV/CC regulation and high power efficiency.

Published: Jan 31, 2016 |