PWM controller for multi-topology power supplies
Control features include dead-time control and frequency control, letting you set the oscillator timing and adjust the overlap between the two outputs. No synchronous rectifier drive or clock sync is built in — this is a straightforward PWM core for isolated and non-isolated designs where you handle the SR externally.
Switching frequency range — transformer sizing
The 1 kHz to 300 kHz range lets you trade off transformer size against core losses. At the low end you use a larger magnetics but get lower switching losses; at the high end you shrink the transformer but need faster diodes and careful layout. The TL494CPWR gives you the flexibility to pick the sweet spot for your power level and cost target.