System and method for determining load current in switching regulators operable in pulse skipping mode
US7161333B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2004 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | May 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Novel circuitry and methodology for determining a load current in a switching regulator circuit operable in a pulse skipping mode of operation and having main and synchronous switches. The load current is determined based on a ratio of time when the synchronous switch is on in the pulse skipping mode to an average period of a switching cycle in the pulse skipping mode. The load current may be measured by a circuit that determines an average value of a switch control signal for controlling the synchronous switch. The load current determining circuit may comprise a low-pass filter for filtering the switch control signal proportional to an input voltage supplied to the switching regulator circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.