The UC2844D8TR is a current-mode PWM controller from Texas Instruments designed for isolated and non-isolated DC-DC converters. The part supports boost, buck, and flyback/forward configurations, all driven by a single transistor driver output. Switching frequency runs up to 500 kHz, which lets you shrink the magnetics compared to a 100 kHz design, but keep an eye on the gate-drive losses at the high end — the 12 V to 28 V supply range gives you headroom for a robust gate signal even with a 12 V rail.
Active status — no LTB scramble needed
It is not automotive-grade (no AEC-Q100 in the record), so for under-hood or engine-bay use you would look at the LM5150QURUMRQ1 which carries that qualification and a wider 150°C junction rating.