Invention Grant
- Patent Title: Voltage detection method and circuit and associated switching power supply
- Patent Title (中): 电压检测方法及电路及相关开关电源
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Application No.: US14490825Application Date: 2014-09-19
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Publication No.: US09407140B2Publication Date: 2016-08-02
- Inventor: Yunlong Han
- Applicant: Silergy Semiconductor Technology (Hangzhou) LTD
- Applicant Address: CN Hangzhou
- Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
- Current Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
- Current Assignee Address: CN Hangzhou
- Agent Michael C. Stephens, Jr.
- Priority: CN201310441482 20130925
- Main IPC: H02M3/15
- IPC: H02M3/15 ; H02M3/335 ; H02M3/155 ; G01R19/00 ; H02M3/156 ; H02M1/00

Abstract:
In one embodiment, a method of detecting a voltage can include: (i) generating a first current according to a first voltage and a converting resistor; (ii) charging a detection capacitor by the first current during a first time period of a switching cycle of a switching power supply; (iii) charging the detection capacitor by a second current during a second time period of the switching cycle; (iv) detecting a voltage across the detection capacitor to obtain a detection voltage at an end time of the second time period, where the first time period includes a rising portion of a current flowing through the inductor, and the second time period includes a decreasing portion of the inductor current; and (v) determining a state of a present output voltage of the switching power supply according to the detection voltage.
Public/Granted literature
- US20150084608A1 VOLTAGE DETECTION METHOD AND CIRCUIT AND ASSOCIATED SWITCHING POWER SUPPLY Public/Granted day:2015-03-26
Information query
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