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A low-side drive circuit for a high-voltage relay

A high-voltage relay and drive circuit technology, applied in relays, circuits, electrical components, etc., can solve problems such as insufficient withstand voltage, and achieve the effect of improving reliability and reducing failure modes.

Active Publication Date: 2021-11-02
58TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-side driving circuit of a high-voltage relay to solve the problem of insufficient withstand voltage of the existing low-side driving circuit of a high-voltage relay

Method used

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  • A low-side drive circuit for a high-voltage relay
  • A low-side drive circuit for a high-voltage relay
  • A low-side drive circuit for a high-voltage relay

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Embodiment 1

[0026] The invention provides a low-side driving circuit of a high-voltage relay, the principle of which is as follows figure 2 As shown, it includes a first input stage, a second input stage, a first driver stage, a second driver stage, a first switch S1 and a second switch S2; wherein,

[0027] The front ends of the first input stage and the second input stage are connected to the input terminal IN, and the rear ends are respectively connected to the front ends of the first drive circuit and the second drive circuit; the first drive circuit and the The rear end of the second drive circuit is respectively connected to the control end of the first switch S1 and the control end of the second switch S2; the output end of the first switch S1 is connected to the input end of the second switch S2 , the input end of the first switch S1 is connected to the output end OUT of the driving circuit; the output end of the second switch S2 is grounded to GND.

[0028] see image 3 , the ...

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Abstract

The invention discloses a low-side driving circuit of a high-voltage relay, which belongs to the technical field of integrated circuits. The high-voltage relay low-side drive circuit includes a first input stage, a second input stage, a first driver stage, a second driver stage, a first switch, and a second switch; the first input stage and the second input stage The front ends of both are connected to the input terminal IN, and the rear ends are respectively connected to the front ends of the first driving circuit and the second driving circuit; the rear ends of the first driving circuit and the second driving circuit are connected to the first driving circuit respectively. A control terminal of a switch and a control terminal of the second switch; the output terminal of the first switch is connected to the input terminal of the second switch, and the input terminal of the first switch is connected to the output terminal OUT of the driving circuit ; The output terminal of the second switch is grounded to GND. The voltage resistance capability of the output terminal OUT of the low-side driving circuit of the high-voltage relay of the present invention is improved, the failure mode of the output terminal is reduced, and the reliability of the low-side driving circuit of the high-voltage relay is improved.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a low-side drive circuit for a high-voltage relay. Background technique [0002] Relay is an automatic switch with isolation function, which is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. The relay drive circuit is a supporting component of the relay. According to the use of the relay, the relay drive circuit is divided into: low-side drive circuit and high-side drive circuit. For high-voltage and high-power relays, the withstand voltage capability, overcurrent capability, and low failure mode of the relay drive circuit are very critical. [0003] Traditional high-voltage relay low-side drive circuit such as figure 1 Shown: IN is the command input port, the command passes through the input stage and the driver stage to control the switch S, S is usually realized by a high-voltage MOSFET or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H47/02
CPCH01H47/02
Inventor 肖培磊胡小琴朱琪阮建新
Owner 58TH RES INST OF CETC
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