Power supply apparatus and method having power limiting mechanism
US11860709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2022 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Jul 14, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/3203
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a power supply apparatus having power limiting mechanism. A switch transistor is controlled by a control voltage such that a power supply unit supplies a power to a powered device when the switch transistor is controlled to be conducted, wherein the switch transistor has an operation current, an operation voltage and an operation power under conduction. A voltage detection circuit detects the operation voltage. A power-limiting circuit performs analog-to-digital conversion on the operation voltage, generates a current-limiting signal related to a current-limiting value according to the operation voltage based on a predetermined voltage-current curve and performs digital-to-analog conversion on the current-limiting signal to generate a reference voltage. A current-limiting circuit receives the reference voltage and a feedback voltage generated according to the operation current to perform comparison and generate the control voltage accordingly to control the switch transistor to keep the operation current at the current-limiting value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.