This passive valley-fill PFC circuit provides good power factor (>0.9) and low total harmonic distortion, or THD (30%), but has a major drawback: the dc bus ripple is 50%.

San Marcos, Calif. – Taiyo Yuden (U.S.A.) Inc.'s 150-watt PAS150 is a universal input/single output switch-mode power supply for 1U-height applications, especially telecom. The supply employs passive ...

Groomed for compact, single-output medical applications, the 1U-high PAM150 switching power supply employs passive PFC technology, versus what is said to be more complex and less ...