Signal based ignition with inductive flyback power
US10389347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2017 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Feb 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0081
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method includes configuring a switching control circuit to operate a power switch to apply power to an inductive device in response to a control signal. The switching control circuit includes a voltage regulator configured to generate a supply voltage from the control signal to power the switching control circuit when the control signal is at or above an operating voltage of switching control circuit. Further, the switching control circuit is configured to controllably discharge the inductive device after power has been applied to the inductive device for a maximum dwell time. The method further includes sampling a flyback voltage off the discharging inductive device, and generating, from the sampled flyback voltage, the supply voltage to power the switching control circuit when the control signal has dropped below the operating voltage of switching control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.