TIDT219 February 2023
This reference design uses the UCC2897A active clamp forward controller to convert 176–264-VAC input to a 24-VDC output with a maximum power of 150 W. The UCC5304 isolated gate driver is used to drive the high-voltage clamp FET. The design achieves > 92% efficiency with diode rectification. Secondary-side current sense provides precise overcurrent protection through a constant-current regulation loop. This design is tested for CISPR 32 Class B conducted emissions.