Recently I got given a board that was part of an automatic swing door opener. It supplies a PWM'd voltage to a reversing DC motor. The board has a 30V DC power supply rated at maybe 7-10 amps and a discrete 25CN10N H-bridge with L6384E level shifting mosfet drivers. I'm thinking of seeing how well it would operate as a filterless class D amplifier. 30VDC rail should give a little over 50 wrms into 8 ohms. There is no provision for NFB so I'll skip that for the moment. What would people recommend for a suitable IC to provide the drive waveforms. 0-5V needed
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For filterless (BD) modulation, you need a ramp generator, two comparators and a truly differential input. TL494/LM319 should be easy to find.