Low-power-consumption main and auxiliary power supply automatic switching circuit

A power switching and automatic switching technology, which is applied to circuit devices, emergency power arrangements, electrical components, etc., can solve problems such as large circuit losses and achieve the effect of reducing losses

Pending Publication Date: 2021-07-16
浙江航芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a disadvantage in this circuit, because there is a voltage drop of a diode D1 in the middle, so the input voltage cannot be completely equal to the output voltage V CC , resulting in a large loss in the circuit

Method used

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  • Low-power-consumption main and auxiliary power supply automatic switching circuit
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  • Low-power-consumption main and auxiliary power supply automatic switching circuit

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Embodiment Construction

[0020] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are disclosed. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferenti...

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PUM

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Abstract

The embodiment of the invention provides a low-power-consumption main and auxiliary power supply automatic switching circuit which comprises a main power supply module, a power supply switching module, an auxiliary power supply module and a power supply output module, the output end of the main power supply module is connected with the first end of the power supply switching module, and the output end of the auxiliary power supply module is connected with the second end of the power supply switching module. The input end of the power supply output module is connected with the third end of the power supply switching module, the power supply switching module is used for realizing automatic switching between the main power supply module and the auxiliary power supply module through an MOS tube, when the main power supply module is connected with a power supply, the power supply output module is connected with the main power supply module through the power supply switching module, and the voltage of the main power supply module is output. When the main power supply module is not connected with the power supply, the power supply output module is connected with the auxiliary power supply module through the power supply switching module, and the voltage of the auxiliary power supply module is output. According to the embodiment of the invention, the whole circuit almost has no voltage drop, and the loss of the whole circuit is reduced.

Description

technical field [0001] The present invention relates to the technical field of electronic circuits, and more particularly, to an automatic switching circuit of main and auxiliary power supplies with low power consumption. Background technique [0002] like figure 1 shown, the external supply V USB Use the internal power supply V when not connected BAT After the external power supply is connected, it automatically switches to the external power supply, and the internal power supply is automatically disconnected. There is a drawback in this circuit, because there is a voltage drop across a diode D1 in the middle, so the input voltage cannot be completely equal to the output voltage V CC , resulting in a large loss of the circuit. SUMMARY OF THE INVENTION [0003] In order to solve the above problem, an embodiment of the present invention provides an automatic switching circuit of main and auxiliary power supplies with low power consumption. [0004] According to a first...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCH02J9/068Y04S20/20Y02B70/30
Inventor 宋佳杨
Owner 浙江航芯科技有限公司
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