Power efficient driver circuit using charge recovery
US10734897B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2019 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Dec 2, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driver circuit and a method for driving a load. The driver circuit has a power supply to provide electrical power at a supply voltage and a PWM control switch to enable and to disable a load current through the load in an alternating manner. In addition, the driver circuit has a storage unit to be charged using the load current through the load. The driver circuit has a sensing unit to provide a charge indication. There is a recycling switch to couple and to decouple the storage unit to or from the power supply. There is a control unit to, repeatedly control the PWM control switch and the recycling switch based on the charge indication and based on a target charge value for the cumulated load current through the load within a cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.