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UCSR3654 - HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH

Datasheet Summary

Description

The UTC UCSR3654 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.
  • 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 winding inductance compensation.
  • Pow.

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Datasheet preview – UCSR3654

Datasheet Details

Part number UCSR3654
Manufacturer UTC
File Size 249.32 KB
Description HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH
Datasheet download datasheet UCSR3654 Datasheet
Additional preview pages of the UCSR3654 datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD UCSR3654 HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH CMOS IC  DESCRIPTION The UTC UCSR3654 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 UCSR3654 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 UCSR3654 achieves high precision CV/CC regulation and high power efficiency.
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