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AP3983R - PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER

General Description

The AP3983R is a power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, and improved protection functions.

Typical applications include chargers and adapters.

Key Features

  • Built-in N Channel MOSFET with 700 BVDSS.
  • Less than 75mW Standby Power Consumption.
  • Meet Efficiency Requirement of COC Trier 2.
  • Valley Turn-on to Reduce Switching Loss and Improve EMI.
  • Piecewise Frequency Reduction to Enhance Conversion Efficiency and Suppress Audio Noise.
  • Overvoltage Protection (OVP).
  • Over-Temperature Protection (OTP).
  • Short Circuit Protection (SCP) with Hiccup Operating Frequency Jitter Function for Conductive EMI Suppression.
  • Tota.

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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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A D V A N CNEEDW IPNRF ODRUMCATT I O N AP3983R PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER Description Pin Assignments The AP3983R is a power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, and improved protection functions. Typical applications include chargers and adapters. The AP3983R with built-in MOSFET, regulates the output voltage and current in the primary side by piecewise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode when the load current equals to the maximum system output current.