Abstract: Pulsed xenon lamp is often used for performance testing of solar cells because its spectrum is most

similar to sunlight. The pulsed xenon lamp power supply is the key factor to ensure the reliable operation of the

pulsed xenon lamp and improve the photoelectric conversion efficiency. In order to solve the problems of the

traditional pulsed xenon lamp power supply with large volume，large noise interference and low reliability，a highreliability pulsed xenon lamp power supply was designed. Staggered parallel Buck was adopted to reduce the output ripple，and the digital control scheme of the improved nested working sequence was used to improve the working reliability of the pulsed xenon lamp. By building an experimental prototype and testing，it is proved that the pulsed power supply can make the pulsed xenon lamp light up 100% and keep working stably.

      Key words: pulse xenon lamp；high reliability；staggered parallel Buck