Title:
METHOD AND DEVICE FOR CONTROLLING FLYBACK DIODE AND POWER SUPPLY SWITCHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/042280
Kind Code:
A1
Abstract:
Embodiments of the present application provide a method and a device for controlling a flyback diode and a power supply switching device. The method comprises: determining whether the sum of a first pulse width value of a flyback diode obtained according to the law of inductive current and a third pulse width value of a main control transistor satisfies a first preset condition, so as to obtain a determination result; and further determining, according to the determination result, whether to control conduction of the flyback diode according to the first pulse width value or a second pulse width value of the flyback diode obtained by means of the volt-second balance principle. The method and the device for controlling a flyback diode and the power supply switching device provided in the embodiments of the present application achieve flexible application of different pulse width values to control conduction of the flyback diode according to different operation scenarios of the power supply switching device, such that the power supply switching device achieves continuous transmission of the energy therein in one direction from an input end to an output end, thereby ensuring a circuit system is reliable.
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Inventors:
JIANG CHENGFENG (CN)
LIANG HONGFENG (CN)
LIANG HONGFENG (CN)
Application Number:
PCT/CN2018/102736
Publication Date:
March 07, 2019
Filing Date:
August 28, 2018
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02M1/08; H02M3/158
Foreign References:
| CN107482885A | 2017-12-15 | |||
| CN103166442A | 2013-06-19 | |||
| CN102624211A | 2012-08-01 | |||
| CN103066825A | 2013-04-24 | |||
| US5189601A | 1993-02-23 | |||
| CN201710777928A | 2017-09-01 |
Other References:
See also references of EP 3667881A4
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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