CCM PFC controller for power supplies
The Infineon ICE2PCS05XKLA1 is a Continuous Conduction Mode (CCM) power factor correction controller designed for off-line AC-DC power supplies. It operates from an 11V to 25V supply rail, making it suitable for universal input (85-265 VAC) applications where the PFC stage runs from a regulated auxiliary winding or a bias supply. A 65 kHz setting is common for standard ferrite cores; pushing above 100 kHz shrinks the boost inductor but demands faster recovery diodes and tighter layout to manage ringing.
Housed in an 8-DIP (0.300", 7.62mm) through-hole package (PG-DIP-8), this controller is friendly to hand-assembly and rework. The 2.54 mm pin pitch and wide body leave room for a socket if you need to swap parts during prototyping. The through-hole format also handles thermal cycling in industrial gear better than a small-outline package — the leads absorb board flex without cracking the mold compound.
The startup current draw is 450 µA typical, which keeps the power dissipation in the start-up resistor low enough to use a standard 1/4 W resistor from the rectified DC bus. Once the auxiliary winding takes over, the controller runs from the VCC pin with the internal bias regulator holding the supply steady.
Sourcing posture
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