Flyback switcher for 22 W isolated supplies
The ICE3AR10080JZXKLA1 is an offline flyback switcher from Infineon's CoolSET™F3R series, integrating a CoolMOS™ power MOSFET with an 800 V breakdown rating. It delivers up to 22 W in isolated flyback topologies, switching at 100 kHz. The 800 V breakdown gives headroom for universal AC input designs (85–265 VAC) where reflected voltage and leakage spikes can push the drain well above the rectified DC bus. The 100 kHz switching frequency keeps the transformer core size manageable for a 22 W output.
Protection set and operating envelope
Built-in fault protection covers over-load, over-temperature, and over-voltage conditions — the controller latches off or auto-restarts depending on the fault, so the supply doesn't run into thermal runaway or deliver an unregulated output. The start-up voltage is 17 V, and the Vcc operating range runs from 10.5 V to 27 V, which accommodates the auxiliary winding voltage variation across load and line. Maximum duty cycle is 75%, typical for a flyback controller in continuous-conduction mode. Junction temperature range is -40°C to 150°C — the 150°C absolute maximum allows the part to survive fault conditions and high ambient temperatures in enclosed power supplies, though the 22 W output derates above 85°C ambient depending on the thermal impedance of the board.
Package and board integration
Housed in a 7-lead PG-DIP-7-1 package (8-DIP footprint with one pin omitted), this through-hole part suits low-cost single-layer boards and hand-assembly or wave-solder production. The tube packaging keeps the leads aligned for auto-insertion. The through-hole DIP package simplifies prototyping and rework compared to surface-mount alternatives — a technician can replace it with a standard soldering iron and desoldering wick.
ROHS3 compliant, so it meets the current EU restriction directive for lead and other substances. The CoolSET™F3R series is a mature, broadly deployed family. No pin-compatible second-source is listed, but the parametric range (800 V, 22 W, 100 kHz) has functional equivalents from other vendors if a BOM hedge is needed — confirm the controller pinout and compensation before substituting.