Diodes Incorporated

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PSR Controller with Wide Output Voltage Range at CC

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The AP3190T is a high-performance offline PSR AC/DC power supply controller. It is specially designed for the application that require the higher efficiency at light load and cost effectiveness.

Using the multi-mode control scheme, the AP3190T can also achieve high conversion efficiency with full load conditions. At heavy load and low line, the AP3190T will operate in QR mode to achieve high performance. When the load decreasing, it will enter into fixed switching frequency operating mode. To optimize product performance, the fixed frequency is different in high line (60kHz) and low line (80kHz).

The AP3190T is traditional PSR CVCC controller. The controller samples the VCS peak current and the demagnetization pulse to regulation the output current. The current and output power setting can be adjusted externally by the sense resistor at CS pin.

The AP3190T provides comprehensive protections without additional circuitry. It contains VCC over voltage protection, output over voltage protection, output short circuit protection, etc.

The AP3190T has adjustable OTP by external NTC resistor. It consumes less than 65mW input power at no load condition with high line voltage.

The AP3190T is packaged in SOT26 (Type SM).


  • Primary Side Control for Eliminating Opto-Coupler
  • 65mW No-Load Input Power
  • Ultra-Low Under Voltage Protection
  • Adjustable Over Temperature Protection
  • Multiple QR/AM Mode to Improve Audio Noise and Efficiency
  • QR for Higher Efficiency and Better EMI
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Power tools
  • Set-top box power supplies
  • Network adaptors

Product Specifications

Product Parameters

OperatingCurrent (µA) 450
StandbyPower (Max) (mW) 65
CableCompensation 2%
Power Rating (W) 45
Release Date 202306

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