ATX PSU PWM chip

Would like to modify a 250W ATX PSU to 13.8V and use it to power ham radio gear. There's quite a bit of helpful info available on the net, but I haven't found any data on the PWM controller IC used which is marked HP1001WA-1. The IC package is a DIP14, the PSU itself is a Dell HP-P2507F3CP.

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Markus L
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