Dell products l.p. (20250141346). HOLD-UP TIME EXTENSION FOR TOTEM POLE BRIDGELESS POWER FACTOR CORRECTION

HOLD-UP TIME EXTENSION FOR TOTEM POLE BRIDGELESS POWER FACTOR CORRECTION

Organization Name

dell products l.p.

Inventor(s)

Danny SC Wang of New Taipei City TW

Rita Joy Fernandez Miranda of Taipei City TW

Alex Tsai of Taipei City TW

Eva Chao of New Taipei City TW

Dennis Alinea Martin of New Taipei City TW

HOLD-UP TIME EXTENSION FOR TOTEM POLE BRIDGELESS POWER FACTOR CORRECTION

This abstract first appeared for US patent application 20250141346 titled 'HOLD-UP TIME EXTENSION FOR TOTEM POLE BRIDGELESS POWER FACTOR CORRECTION

Original Abstract Submitted

in one or more embodiments, a psu comprises a bridgeless pfc circuit with a hold-up time extension. if a voltage drop is detected, a relay switches operation to a first boost converter action to store energy in a pfc choke. if voltage remains low, the pfc choke may transfer energy to a bulk capacitor, increasing the amount of time an information handling system can operate before a shut-down procedure needs to start. if power returns, selected switches are turned on in an order such that an inrush current does not damage components in the psu.