Title:
METHOD AND CIRCUIT FOR SUPPRESSING SURGE CURRENT OF DIRECT CURRENT POWER SOURCE
Document Type and Number:
WIPO Patent Application WO/2015/196632
Kind Code:
A1
Abstract:
A method and circuit for suppressing a surge current of a direct current power source. The method comprises: accessing, by a secondary power source, a supply power source, and charging an energy storage unit via a constant-current source circuit (10); driving, by a voltage detection circuit (12), a delay circuit (14) after detecting that a voltage of an energy storage capacitor (C2) in the energy storage unit reaches a pre-determined voltage value; driving, by the delay circuit (14), a switch unit (16) to open slowly until the switch unit (16) is completely conducted; and bypassing, by the switch unit (16), the constant-current source circuit (10), and charging the energy storage unit. By means of the above-mentioned technical solution, an impulse current can be suppressed, and a voltage drop in opening a soft-start switch is also reduced.
Inventors:
YAN YONGHONG (CN)
Application Number:
PCT/CN2014/088519
Publication Date:
December 30, 2015
Filing Date:
October 13, 2014
Export Citation:
Assignee:
ZTE CORP (CN)
International Classes:
G06F1/26
Foreign References:
| CN201726130U | 2011-01-26 | |||
| CN103699169A | 2014-04-02 | |||
| CN101217252A | 2008-07-09 | |||
| CN102955550A | 2013-03-06 | |||
| US20060132999A1 | 2006-06-22 | |||
| JP3156693B2 | 2001-04-16 |
Attorney, Agent or Firm:
KANGXIN PARTNERS,P.C. (CN)
北京康信知识产权代理有限责任公司 (CN)
北京康信知识产权代理有限责任公司 (CN)
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