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UPSR105 - POWER SUPPLY CONTROLLER

General Description

controller for battery charger and adapter applications.

It can meet less than 10mW standby power for “Super Star” charger criteria.

Key Features

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  • Primary Side Control for Eliminating Opto-coupler.
  • 10mW No-load Input Power.
  • Flyback Topology in DCM Operation.
  • External Adjustable Line Compensation for CC.
  • External Adjustable Cable Compensation for CV.
  • Multiple PWM/PFM Control Mode to Improve Audio Noise Efficiency.
  • VCS Jitter to Reduce System EMI.
  • Valley-on for the Higher Efficiency and Better EMI.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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UNISONIC TECHNOLOGIES CO., LTD UPSR105 Advance PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER CMOS IC  DESCRIPTION The UTC UPSR105 is a high performance AC/DC power supply controller for battery charger and adapter applications. It can meet less than 10mW standby power for “Super Star” charger criteria. SOP-8 The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. The UTC UPSR105 provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation circuitry while maintaining stability.