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Output voltage switching circuit and power supply system

A technology of output voltage and switching circuit, which is applied in the electronic field, can solve the problems of large voltage drop of the diode itself, large switching loss of the output voltage, etc., and achieve the effects of avoiding output voltage jitter, rising waveform smooth, and avoiding damage

Inactive Publication Date: 2020-10-02
SUZHOU HUAXING YUANCHUANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the output voltage switch is a MOSFET with an anti-reverse diode, the loss of the output voltage switch is relatively large due to the relatively large voltage drop of the diode itself.

Method used

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  • Output voltage switching circuit and power supply system
  • Output voltage switching circuit and power supply system
  • Output voltage switching circuit and power supply system

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0025] figure 1 It is a schematic structural diagram of an output voltage switching circuit provided by an embodiment of the present invention. Such as figure 1 As shown, the output voltage switch circuit includes a switch unit 110 and a switch control unit 120; the switch unit 110 includes at least one first switch tube 111 and at least one second switch tube 112 of the same type, any first switch tube 111 and any The gate of a second switch tube 112 is electrically connected to the first output terminal 121 of...

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PUM

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Abstract

The invention discloses an output voltage switching circuit and a power supply system. The output voltage switch circuit comprises a switch unit and a switch control unit, wherein the switch unit comprises at least one first switch tube and at least one second switch tube of the same type, the grid electrodes of any first switch tube and any second switch tube are electrically connected with the first output end of the switch control unit, the source electrode of any first switch tube and the source electrode of any second switch tube are electrically connected with the second output end of the switch control unit, the drain electrode of any first switch tube is electrically connected with the output end of an output voltage unit, and the drain electrode of any second switch tube is used as the output end of the output voltage switch circuit. According to the invention, a backflow phenomenon can be avoided so as to avoid damage to the output voltage unit, and the rising waveform of theoutput voltage can be smooth so as to avoid jittering of the output voltage.

Description

technical field [0001] The embodiments of the present invention relate to the field of electronic technology, and in particular to an output voltage switch circuit and a power supply system. Background technique [0002] In the prior art, the internal structure of the display module requires multiple supply voltages, and output voltage switches are provided in each voltage to meet the soft start and timing requirements of each voltage. Traditional output voltage switches include relay switches, separate metal-oxide-semiconductor field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) switches, and MOSFET plus anti-reverse diode switches. When the output voltage switch adopts a relay switch, it is a physical switch, and the switch is completely disconnected. When outputting high voltage, if the relay flows a large current or has a relatively large load capacitance, the contacts of the relay will be damaged due to the instantaneous large current. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/092H02M1/32
CPCH02M1/092H02M1/32H02M1/0054Y02B70/10
Inventor 樊定
Owner SUZHOU HUAXING YUANCHUANG TECH CO LTD
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