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USRB01A - HIGH PRECISION CC/CV PRIMARY SIDE SWITCH

Datasheet Summary

Description

The UTC USRB01A is a primary controller for charger and adapter applications.

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

Features

  • S SOP-8.
  • ±5% constant voltage regulation at universal AC input.
  • Primary side control without TL431 and opto-coupler.
  • High precision constant current regulation at universal AC input.
  • Programmable CV and CC regulation.
  • Eliminates control loop compensation circuitry.
  • Flyback topology in DCM operation.
  • Random frequency modulation to reduce system EMI.
  • Built-in power NPN.

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Datasheet Details

Part number USRB01A
Manufacturer UTC
File Size 262.68 KB
Description HIGH PRECISION CC/CV PRIMARY SIDE SWITCH
Datasheet download datasheet USRB01A Datasheet
Additional preview pages of the USRB01A datasheet.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD USRB01A Preliminary LINEAR INTEGRATED CIRCUIT HIGH PRECISION CC/CV PRIMARY SIDE SWITCH „ DESCRIPTION The UTC USRB01A is a primary controller for charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. The UTC USRB01A operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It also eliminates the need of loop compensation circuitry while maintaining stability. The UTC USRB01A achieves high precision CV/CC regulation and high power efficiency.
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