Title:
POWER SUPPLY COMBINING CIRCUIT, CONTROL METHOD, AND VEHICLE-MOUNTED WIRELESS COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2019/095947
Kind Code:
A1
Abstract:
The present application provides a power supply combining circuit, a control method, and a telematics box. When the output voltage of a master power supply is low, a switch is controlled to be turned on to turn on a standby power supply; at this time, the master power supply and the standby power supply simultaneously supply power to a boost and combining circuit, and the boost and combining circuit boots the master power supply and the standby power supply to ensure that the power supply loss of a combiner is reduced when the master power supply and the standby power supply are combined, thereby improving the power supply utilization rate, the standby power supply having a low output voltage can be used to supply power to a post-stage unit of a telematics box, and a stable voltage can be maintained during the switching of the master power supply and the standby power supply.
Inventors:
LU HUIQI (CN)
WANG XUN (CN)
WANG XUN (CN)
Application Number:
PCT/CN2018/111638
Publication Date:
May 23, 2019
Filing Date:
October 24, 2018
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02J9/00
Foreign References:
| CN102510121A | 2012-06-20 | |||
| CN204068287U | 2014-12-31 | |||
| CN102710010A | 2012-10-03 | |||
| US8358489B2 | 2013-01-22 |
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