Current-mode DC/DC converter and method therefor
US10020729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2017 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Nov 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0029
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current-mode DC-DC converter includes a power switch and a reset circuit for providing a resettable input signal to the switch. A first feedback loop, coupled to the switch, provides a control signal to the reset circuit to instigate the resettable input signal when a ramp voltage reaches a target peak current value. An inductor is coupled to the switch. A second current control feedback loop includes a current sense circuit that monitors an inductor current influenced by an output of the switch, and a slope compensation circuit for introducing a ramp voltage to a sensed voltage of the switch to control power switch on/off to limit the inductor current. The converter is characterized by a slope compensation effect cancellation circuit coupled to the current sense circuit via the second feedback loop for sensing an inductor peak current and controlling power switch on/off in response to the inductor peak current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.