Power supply controller to actively drive a load current when the load current exceeds a set point
US7616462B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Mar 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control circuit for a switching power supply reacts to an over current condition in the switching power supply to bring its operating point to a safe condition. The control circuit senses both the direction and the magnitude of the load current in the switching power supply, and then uses this sensed information to control the active power switches in the switching power supply. In an over current condition, the switches are controlled to actively drive the load current toward zero, even if the sensed information is delayed or heavily filtered, or the switch signals from the control circuit are delayed in reaching the switches. The resulting operation of the switching power supply is more resistant to abnormal load conditions and is maintained in the presence of transient short circuits or arcs. The switching power supply hardware is also better protected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.