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N-channel metal oxide semiconductor (NMOS) transistor-based high-power electronic switch

An electronic switch, high-power technology, applied in the field of high-power DC solid-state electronic switches, can solve the problems of high loss, inability to meet high-power devices, and low load power.

Inactive Publication Date: 2012-05-30
上海复莱信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the current design of electronic switches, there are often disadvantages such as high cost, slow response, and high loss, and due to design limitations, the load power of many electronic switches is relatively low, which cannot meet the needs of some high-power devices.

Method used

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  • N-channel metal oxide semiconductor (NMOS) transistor-based high-power electronic switch
  • N-channel metal oxide semiconductor (NMOS) transistor-based high-power electronic switch
  • N-channel metal oxide semiconductor (NMOS) transistor-based high-power electronic switch

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Experimental program
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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, the electronic switch of the present invention includes an input terminal (1), an output terminal (2), a control terminal (3), a ground terminal (4), an NMOS tube (5), a linear voltage stabilizing step-down circuit (6), Square wave pulse generator (7), charge pump circuit (8). When the input of the control terminal (3) is a high level (≥2V), the control circuit generates a positive driving voltage suspended at the S pole level of the NMOS transistor (5), which is about 15V, and the NMOS transistor (5) is turned on; When the voltage of the control terminal (3) is 0 level, the control circuit stops working, and the NMOS tube (5) is turned off.

[0022] Such as figure 2 As shown, the schematic diagram of the electronic switch is shown in Figure 4. The power supply of the control circuit is composed of a linear voltage stabilizing and...

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Abstract

The invention provides a high-power direct-current solid electronic switch adopting an N-channel power metal oxide semiconductor (MOS) transistor as a switch element. A control circuit consists of a linear voltage-stabilizing and voltage-reducing circuit, a square wave pulse generator and a charge pump circuit, wherein the linear voltage-stabilizing and voltage-reducing circuit provides a power supply to the whole control circuit and the square wave pulse generator provides a low-power signal while the charge pump circuit accumulates energy for the purpose of controlling a high-power circuit by the low-power signal. The high-power electronic switch of the invention has the advantages of low cost, quick responses and low loss, and is capable of adapting with a logical circuit and reliable in operation.

Description

Technical field: [0001] The invention belongs to the field of electronic switches, and relates to a stable and reliable high-power direct-current solid-state electronic switch which uses NMOS tubes as switching devices and is compatible with logic circuits. Background technique: [0002] The electronic switch is an operating unit that uses power electronic devices to realize circuit on-off. It includes at least one controllable electronic valve device. According to the scope of use, it can be divided into DC electronic switches and AC electronic switches. [0003] Electronic switches generally consist of pulse width modulation (PWM) control ICs and MOSFETs. Compared with the linear power supply, the cost of the electronic switch increases with the increase of the output power, but the growth rate of the two is different. At a certain output power point, the cost of linear power supply is higher than that of electronic switch, which is called the cost reversal point. With t...

Claims

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Application Information

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IPC IPC(8): H03K17/567H03K17/04
Inventor 徐小科何兵
Owner 上海复莱信息技术有限公司
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