Diodes Incorporated

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PSR Controller with Light-Load High Efficiency

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 The AP3190 is a high-performance offline PSR AC/DC power supply controller. It is specially designed for the applications that require the higher efficiency at light load and cost effectiveness. Using the multimode control scheme, AP3190 can also achieve high-conversion efficiency with full-load conditions.

At heavy load and low line, AP3190 will operate in QR mode to achieve high performance. When the load is decreasing, it will enter fixed switching frequency operating mode. To optimize product performance, the fixed frequency is different in high (60kHz) and low line (80kHz). At light load or no load, the IC will operate in burst mode to minimize power consumption.

The AP3190 provides comprehensive protections without additional circuitry. It includes VCC overvoltage protection, output overvoltage protection, output short-circuit protection, etc. AP3190 has adjustable OTP by external NTC resistor. Besides, AP3190 consumes less than 65mW input power at no-load condition with high-line voltage.

AP3190 is packaged in SOT26 (Type SM).


  • Burst Mode Operation for Light Load High Efficiency (at 10% Loading > 80%)
  • Primary Side Control for Eliminating Optocoupler
  • 65mW No-Load Input Power
  • Adjustable Overtemperature 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/


  • Adapters/chargers
  • Smart speakers
  • 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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