The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2024
Filed:
Jun. 21, 2022
Realtek Semiconductor Corporation, Hsinchu, TW;
Rui Wang, Suzhou, CN;
Min Zhang, Suzhou, CN;
He Li, Suzhou, CN;
Qi-Cai Tang, Suzhou, CN;
Teng-Yue Zhang, Suzhou, CN;
REALTEK SEMICONDUCTOR CORPORATION, Hsinchu, TW;
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.