Flyback power stage with 800 V CoolMOS™ — what the 54 W rating buys you
The Infineon ICE2QR2280ZXKLA1 is an integrated offline flyback switcher from the CoolSET™-Q1 family, combining a PWM controller with a 800 V avalanche-rated CoolMOS™ power MOSFET in a single through-hole PG-DIP-7-4 package. The 800 V breakdown voltage gives real margin for universal AC input (85–265 VAC) designs: the reflected voltage plus leakage spike stays well within the MOSFET's safe operating area, even with a loosely coupled transformer. The 52 kHz switching frequency is a practical middle ground — the transformer core is small enough for a compact footprint, yet the switching losses stay low enough that a through-hole DIP package can dissipate the heat without a heatsink in many 30–40 W designs. Fault protection covers the common failure modes: current limiting, overload, over-temperature, and over-voltage are all on-chip, so the controller latches off or auto-restarts without external supervision. The output is isolated, meaning the feedback loop crosses the isolation barrier via an optocoupler — standard for mains-isolated supplies.
Through-hole PG-DIP-7-4 — why it matters for your assembly line
The PG-DIP-7-4 package is a 7-lead through-hole DIP with a 0.300-inch body width. It is a direct fit for wave-solder or hand-assembly lines, and it stands up to vibration better than a surface-mount part in the same power range — something to consider if the supply lives on a motor drive or in an industrial cabinet. The 7-lead variant includes the drain tab as a dedicated pin for thermal conduction to the PCB copper. The supply voltage range of 10.5 V to 27 V on Vcc gives flexibility for bias winding design: you can set the auxiliary winding for a nominal 15 V or 18 V and still have headroom during start-up transients. The start-up voltage threshold is 18 V, after which the internal start-up current source turns off, reducing power dissipation in the IC.
No special handling or exemption tracking is needed.