Non-positive inductor current detector for step down switching regulators
US8421425B1 · kind B1 · utility
6Cited by
5References
15Claims
0Family size
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Key dates
| Filing date | Sep 23, 2010 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Oct 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current detector for an output load includes a high side power transistor; a low side power transistor coupled to the high side power transistor; and a controller coupled to the high and low side power transistors to provide cycle by cycle control of the conduction of the high and low side power transistors, wherein if the controller detects zero or negative current in the output inductor, using a dead time between when the low side power transistor turns off and before the high side power transistor turns on, the low side power transistor is held off during the entirety of the next switching cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.