System and method for power stage current-sense accuracy improvement in a power system
US11444533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2020 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Jan 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1588
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power stage includes a power converter having high- and low-side switches, a driver circuit that drives the switching power converter based upon a PWM signal, and a current sensing circuit that detects a low-side current level on the low-side switch, and provides a current level signal that includes the low-side current level. The power stage turns on the low-side switch at a first time, and estimates a first low-side current level at the first time. In estimating the first low-side current level, the power stage detects a second low-side current level at a second time while the low-side switch is turned on, the second time being after the first time, and detects a third low-side current level at a third time while the low-side switch is turned on, wherein the third time is after the second time. The first low-side current level is estimated based upon the second and third low-side current levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.