Title:
STARTING CIRCUIT OF POWER MANAGEMENT CHIP, AND POWER MANAGEMENT CHIP
Document Type and Number:
WIPO Patent Application WO/2014/206178
Kind Code:
A1
Abstract:
A starting circuit (10) of a power management chip, comprising: a starting capacitor (C3) which is used for connecting a power supply via an external resistor (R2) to perform charging; a switch circuit (100) which is connected between the external resistor (R2) and the starting capacitor (C3); a voltage detection circuit (200) which is used for detecting a voltage on the starting capacitor (C3) and is connected to the switch circuit (100) so as to control the on/off switching of the switch circuit (100); and a voltage maintaining circuit (300) which is connected between the starting capacitor (C3) and an operating circuit of the power management chip and is used for acquiring a voltage that maintains the starting capacitor (C3) from the operating circuit of the power management chip, wherein when the voltage detection circuit (200) detects that the starting capacitor (C3) reaches the starting voltage of the power management chip, the broken circuit of the switch circuit (100) is controlled. Further provided is a power management chip including the above-mentioned starting circuit (10). Disconnecting an external power source from the starting capacitor after the operating circuit of the power management chip is started can reduce the electric energy consumption.
Inventors:
ZHANG NAN (CN)
Application Number:
PCT/CN2014/078912
Publication Date:
December 31, 2014
Filing Date:
May 30, 2014
Export Citation:
Assignee:
CSMC TECHNOLOGIES FAB1 CO LTD (CN)
International Classes:
H02M1/36
Foreign References:
| CN1196605A | 1998-10-21 | |||
| CN1196604A | 1998-10-21 | |||
| CN1209680A | 1999-03-03 | |||
| CN1106594A | 1995-08-09 | |||
| US4564767A | 1986-01-14 | |||
| CN1344056A | 2002-04-10 | |||
| CN1489270A | 2004-04-14 | |||
| CN103078486A | 2013-05-01 | |||
| CN201213252Y | 2009-03-25 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
广州华进联合专利商标代理有限公司 (CN)
广州华进联合专利商标代理有限公司 (CN)
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