Architecture for controlling a dual polarity, single inductor boost regulator used as a dual polarity supply in a hard disk drive dual stage actuator (DSA) device
US8232790B2 · kind B2 · utility
33Cited by
9References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 15, 2009 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Aug 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1584
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dual supply circuit uses a dual feedback control, single inductor, dual polarity boost architecture with a low side power FET for end of current recirculation sensing. A dual feedback system tracks the output voltage variations and a low side power FET end of current recirculation sensing utilizes the internal current limit sensing system. Logic defining the state of operations allows the regulator to operate in both single and dual mode to cater to wide application ranges. The positive boost regulator can be operated in a buck mode making the output voltage constant with high input supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.