Standby power supply circuit and electronic equipment

A backup power supply and circuit technology, applied in battery circuit devices, circuit devices, charging/discharging current/voltage regulation, etc., can solve problems such as high charging current, power supply output performance requirements, unfavorable power supply costs of electronic equipment, etc., to achieve reduction Requirements, the effect of reducing power supply costs

Pending Publication Date: 2021-11-30
HUIZHOU BOSHIJIE TECH CO LTD
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Problems solved by technology

[0004] However, in the application using farad capacitors as backup power supply, the instantaneous charging current of farad capacitors is too high, which will pull the current of the power supply beyond the limit current of overcurrent protection, which has higher requirements on the output performance of the power supply. Not conducive to reducing the power supply cost of electronic equipment

Method used

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  • Standby power supply circuit and electronic equipment
  • Standby power supply circuit and electronic equipment
  • Standby power supply circuit and electronic equipment

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Embodiment Construction

[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the description of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0037] It can be understood that the terms "first", "second", etc. used in the present application may b...

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Abstract

The invention provides a standby power supply circuit and electronic equipment. According to the invention, an energy storage unit and a switch unit are connected between a first power supply end and a grounding end, and within a preset time after the first power supply end is connected with a first power supply, a control unit outputs a preset duty switch control signal to control the on and off states of the switch unit, so that the value of the average charging current of the first power supply for charging the energy storage unit is controlled to be a preset value; and within the preset time after the first power supply end is connected with the first power supply, the charging current of the energy storage unit cannot be increased to the overcurrent protection value of the first power supply, so that the requirement on the output performance of the first power supply can be reduced, and the power supply cost of the electronic equipment can be further reduced.

Description

technical field [0001] The invention relates to the technical field of power management, in particular to a backup power circuit and electronic equipment. Background technique [0002] On some terminal devices, after the power supply is cut off, a backup power supply is required for emergency power supply, so that the terminal device can make emergency warnings, report or save relevant data. [0003] Traditional terminal equipment usually uses batteries as backup power, but batteries have the problems of large environmental pollution, large volume, short life, high and low temperature resistance, and high cost. Therefore, in some existing terminal equipment, a large-capacity farad capacitor (also called a super capacitor) is used to connect to the output terminal of the power supply as a backup power supply. [0004] However, in the application using farad capacitors as backup power supply, the instantaneous charging current of farad capacitors is too high, which will pull ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J9/06
CPCH02J7/007H02J7/00304H02J9/061Y02B70/30Y04S20/20
Inventor 马颖杰掲育运宁志敏
Owner HUIZHOU BOSHIJIE TECH CO LTD
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