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A power switch circuit

A power switch and circuit technology, which is applied in the field of circuits, can solve the problems of reducing the output voltage of the power supply and abnormal operation of other circuit modules, and achieve the effect of dynamic adjustment of the opening speed, avoiding failure to work normally, and reducing the impact

Active Publication Date: 2018-12-07
广州希倍思智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a power switch circuit to solve the technical problem in the prior art that the output voltage of the power supply will be reduced when the power switch of a certain hardware module is turned on, causing other circuit modules to work abnormally.

Method used

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Experimental program
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Embodiment 1

[0020] figure 1 It is a schematic structural diagram of a power switch circuit provided by Embodiment 1 of the present invention. The power switch circuit can be used to control the on and off of the current in the external power consumption module. Such as figure 1 As shown, the power switch circuit includes: a control capacitor C1, a first resistor R1, a second resistor R2, a first triode P1, and a field effect transistor Q1, wherein,

[0021] The first terminal of the control capacitor C1 is respectively connected to the output terminal of the external power supply, the first terminal of the second resistor R2 and the source of the field effect transistor Q1, and the second terminal of the control capacitor C1 is respectively connected to the The first end of the first resistor R1 is connected to the gate of the field effect transistor Q1, and is used to jointly control the turn-on time of the field effect transistor Q1 with the first resistor R1;

[0022] The first end ...

Embodiment 2

[0033] figure 2 It is a schematic structural diagram of a power switch circuit provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above embodiments, such as figure 2 As shown, the power switch circuit provided in this embodiment further includes: a second triode P2, the base of the second triode P2 is respectively connected to the second end of the first resistor R1, the second The second end of the resistor R2 is connected to the collector of the first transistor P1, and the collector of the second transistor P2 is connected to the drain of the field effect transistor Q1 and the drain of the external power module respectively. The input terminal is connected, and the emitter of the second triode P2 is grounded to form a path with the compensation capacitor at the input terminal of the external power consumption module.

[0034] Considering the complexity of the power switch circuit and the difficulty of controlling the powe...

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Abstract

The embodiment of the invention discloses a power switch circuit. The circuit comprises a control capacitor, a first resistor, a second resistor, a first triode, and a field effect transistor. A first end of the control capacitor is connected with the output end of an external power supply, a first end of the second resistor and the source of the field effect transistor, and a second end is connected with a first end of the first resistor and the gate of the field effect transistor. The first end of the first resistor is connected with the gate of the field effect transistor, and a second end of the first resistor is connected with a second end of the second resistor and the collector of the first triode. The first end of the second resistor is connected with the output end of the external power supply and the source of the field effect transistor, and the second end is connected with the collector of the first triode. The base of the first triode is connected with an external switching control module, and the emitter is grounded. The source of the field effect transistor is connected with the output end of the external power supply, and the drain is connected with the input end of an external power utilization module. Through the technical scheme, the stability of other circuit modules connected with the external power supply at the opening moment of the switch can be improved.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a power switch circuit. Background technique [0002] In recent years, mobile terminals have become an indispensable terminal device in people's daily life, and people's application of most of the functions of the mobile terminal depends on the network functions of the mobile terminal. With the development of wireless communication technology, wireless networks such as mobile networks and wireless local area networks have gradually replaced wired networks as the most commonly used means of network communication. [0003] When people use the mobile network (such as 3G network or 4G network, etc.) or wireless local area network (such as Wi-Fi, etc.) of mobile terminals, they usually need to control the opening and closing of the mobile network or wireless local area network through the mobile network switch or wireless local area network switch. . In the state of being connected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08
CPCH02M1/08
Inventor 蒋伟
Owner 广州希倍思智能科技有限公司