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AP3790 - COMPATIBLE AC/DC PSR CONTROLLER

Description

The AP3790 is a high accuracy and low cost switching mode power supply controller to drive power bipolar transistor for battery charger/adapter applications.

Features

  • Compatible to MediaTek Pump ExpressTM Protocol.
  • Ultra-Low Standby Power Consumption.
  • Valley-turn On to Reduce Switching Loss and Benefit for EMI.
  • Piece-wise Frequency Reduction to Enhance Conversion Efficiency and Suppress Audio Noise.
  • ±5% Constant Voltage Accuracy for 5V Output.
  • Audio Noise Suppression.
  • Open Circuit Protection (OCkP).
  • Current Sense Resistor Short Protection.
  • Over Voltage Protection (OVP).
  • Over Temperature Protection (OTP).

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Full PDF Text Transcription

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NEW PRODUCT A Product Line of Diodes Incorporated AP3790 PUMP EXPRESSTM COMPATIBLE AC/DC PSR CONTROLLER Description Pin Assignments The AP3790 is a high accuracy and low cost switching mode power supply controller to drive power bipolar transistor for battery charger/adapter applications. The controller regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The controller uses adaptive source current to optimize driving current to reduce driving loss. The system operating frequency reduces linearly from heavy load to light load in each interval of the pPFM, and enters constant current mode when the load current is equal to the maximum system output current.
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