This is a reference design for a 13 W auxiliary power supply for an outdoor air-conditioner unit with the latest fifth-generation Infineon Fixed-Frequency (FF) CoolSET™ ICE5AR4770AG. The power supply is designed with a universal input compatible with most geographic regions, and two non-isolated outputs (+12V/0.85 A, +15 V/150 mA) on a single-layer PCB. The PCB has a provision to add a linear regulator to support athird output (e.g. +5 V), which is connected to a +12 V output.
Tightly regulated output voltages, high efficiency under light load and low standby powerComprehensive protection feature CoolSET™ with integrated input Line Over Voltage Protection (LOVP) andexternally implemented brown-in protection (GATE pin resistor to GND)Auto-restart protection scheme to minimize interruption and enhance end-user experience