Switching power supply apparatus and semiconductor device
US9024613B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2013 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Nov 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply apparatus includes: an input terminal; an output terminal; a switching element; an input and output converting unit which converts input voltage applied through the switching element into output voltage to supply output power to a load; an output voltage feedback unit which outputs a feedback signal, based on the output voltage; a switch current detecting unit which detects current flowing through the switching element; an oscillating frequency setting unit which sets the switching frequency of the switching element, based on the feedback signal; a peak current setting unit which controls turn-off of the switching element by setting a current threshold such that a switch current peak (i) is constant regardless of a change in the output power and (ii) increases as the input voltage increases; and a switching control unit which controls switching operation of the switching element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.