Back to results
US 2011/0255314 A1Published application
Switched power converter with extended hold-up time
AssigneeNXP B.V.
InventorsJohann Baptist Daniel Kuebrich, Thomas Antonius Duerbaum, Marcus Schmid, Hans Halberstadt
Life of this patent
Estimating the term…
Abstract
A power supply module having a PFC stage has a hold-up capacitor (34) for continuing output power for a time after an ac power supply (2) stops. The hold-up capacitor is charged by a winding (40) driven magnetically from a first winding (24); the first winding (24) may be the winding used in a boost converter stage, such as commonly used in a PFC stage, or alternatively the winding in an alternative stage such as a flyback converter.
Claims12
A switching power supply module, comprising
- high and low side output terminals;
- an output capacitor across the output terminals;
- high and low side dc lines;
- a first winding and a first switch arranged to switch power from the dc lines through the first winding to deliver power to the output terminals;
- a hold-up capacitor for supplying hold-up power to the dc lines;
- wherein
- a second winding is coupled to the first winding, the second winding being connected across the hold-up capacitor for charging the hold-up capacitor.
4 more elements
Dependencies are inferred from the claim text.