Infineon Technologies


12W auxiliary SMPS for energy-efficient refrigerator using ICE5QR2270AZ

Topologie: Flyback
Eingangsspannung (min.): 85.00 V
Eingangsspannung (max.): 264.00 V
Ausgang 1: 12.00 V / 1.000 A

Erstveröffentlichung am 26.03.2019, Version 1


This document is a reference design for a 12 W auxiliary SMPS for a refrigerator with the latest fifth-generation Infineon QR CoolSET™ ICE5QR2270AZ. The power supply is designed with a universal input compatible with most geographic regions and isolated output (+12 V/1 A) on a single-layer PCB, as typically employed in most home appliances.


  • Novel quasi-resonant switching scheme
  • Rapid and adjustable start-up with cascode configuration
  • 2 level selectable active burst mode level
  • Built-in digital soft-start
  • Cycle by cycle peak current limitation
  • Digital frequency reduction with decreasing load for higher efficiency
  • Adjustable line input over-voltage and brown IN/OUT protection
  • VCC and CS pin short to ground protection
  • OLP, output short, output over-voltage, OTP with hysteresis and VCC over/under voltage protection
  • Auto-restart for all protection features


  Artikel Nr. SPEC Produktserie L
RDC max.
RDC typ.
n ISAT 1
IR 1
(V (AC))
Montageart Muster
7447462022 PDF WE-TI Tonneninduktivität 2.2 6.3 0.02 0.01 65
750343586 PDF MID-CMCP Power Common Mode Choke 39 1:1 5 0.89 1 1500 THT
750344229 PDF Offline Transformer