Integrated soft start circuits
US8564272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2008 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Sep 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Various circuits, including DC/DC converters can include an integrated soft-start circuit. The integrated soft-start circuit includes a PMOS transistor configured to receive a reference signal and control the current to a bipolar junction transistor when the reference signal is in a first state. First and second NMOS transistors are included in the soft-start circuit, and receive the reference signal to turn off (to release from reset) when the reference signal is in the first state. A capacitor coupled in parallel with one of the NMOS transistors controls the soft-start signal. Various different transistors types can be used depending on the desired implementation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.