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Title:
ADAPTIVE THERMAL OVERSHOOT AND CURRENT LIMITING PROTECTION FOR MOSFETS
Document Type and Number:
WIPO Patent Application WO/2019/169611
Kind Code:
A1
Abstract:
An apparatus, an integrated circuit and a method for protecting a MOSFET are disclosed. The apparatus (400) includes: a first metal oxide semiconductor field effect transistor (MOSFET) (409) coupled between a first input terminal (402) for receiving a supply voltage and an output terminal (404) for coupling to a load, and having a first gate terminal; an enable terminal (406) coupled to the first gate terminal for receiving an enable signal; a first current mirror (412) coupled between the first input terminal and a first terminal of a first series resistor (432) and having an input coupled to the first gate terminal; and a second MOSFET (434) coupled between the first gate terminal and the output terminal, and having a second gate terminal coupled to the first terminal of the first series resistor, the first series resistor having a second terminal coupled to the output terminal. The apparatus, the integrated circuit and the method can realize the thermal and current limit protection of the MOSFET.

Inventors:
XU, Wei (Room 90, Building 14Zhongyuan Road, Suzhou Industrial Par, Suzhou Jiangsu 1, 210021, CN)
XU, Jingwei (5801 Furneauz Drive, Plano, TX, 75093, US)
WANG, Yang (No. 58 Huoxiang Road, Pudong New Area, Shanghai 3, 201203, CN)
MA, Qingjie (Room 601, Building 57Zhengli Road No. 711, Yangpu, Shanghai 3, 200433, CN)
Application Number:
CN2018/078444
Publication Date:
September 12, 2019
Filing Date:
March 08, 2018
Export Citation:
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Assignee:
TEXAS INSTRUMENTS INCORPORATED (12500 Ti Boulevard, MS 3999Dallas, TX, 75243, US)
TEXAS INSTRUMENTS JAPAN LIMITED (24-1 Nishi-Shinjuku 6-Chome, Shinjuku-ku, Tokyo, 160-8366, JP)
International Classes:
H02H3/08; H02H9/02
Foreign References:
US20180048140A12018-02-15
US8154346B22012-04-10
US20030169025A12003-09-11
JP2002111480A2002-04-12
EP0927920A11999-07-07
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (Unit 2202, Tower A Beijing Marriott Center, No. 7,Jian Guo Men South Avenue, Beijing 5, 100005, CN)
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