The main challenge for controlling a phase-shifted full-bridge (PSFB) in space is the lack of commercially available radiation-hardened (rad-hard) control chips for PSFB. However, control can be achieved using various discrete rad-hard components. This work presents the implementation of control scheme consisting of a PWM, discrete dead-time circuit, and phase-shifting logic using high-speed CMOS chips. The design and implementation of a discrete PSFB controller are presented, and its performance is tested on a 300W PSFB with a high-voltage output of 600V. The results demonstrate the feasibility and reliability of this approach, providing a viable solution for high-voltage space applications.
