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A high-voltage relay high-side drive circuit

A high-voltage relay and drive circuit technology, which is applied to logic circuits using semiconductor devices, logic circuits using specific components, etc., can solve problems such as insufficient withstand voltage, and achieve the effect of improving reliability and reducing failure modes

Active Publication Date: 2022-08-02
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 high-side driving circuit of a high-voltage relay to solve the problem of insufficient withstand voltage of the existing high-side driving circuit of a high-voltage relay

Method used

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  • A high-voltage relay high-side drive circuit
  • A high-voltage relay high-side drive circuit
  • A high-voltage relay high-side drive circuit

Examples

Experimental program
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Embodiment 1

[0025] The invention provides a high-voltage relay high-side drive circuit, the principle of which is as follows figure 2 As shown, it includes a first input stage, a second input stage, a first driving stage, a second driving stage, a first switch S1 and a second switch S2; the front ends of the first input stage and the second input stage are both It is connected to the input terminal IN, and the rear end is connected to the front end of the first driving circuit and the second driving circuit respectively; the rear end of the first driving circuit and the second driving circuit are respectively connected to the first switch S1 and the control terminal of the second switch S2; the input terminal of the first switch S1 is connected to the power supply VDD, and the output terminal is connected to the input terminal of the second switch S2; the output terminal of the second switch S2 The terminal is connected to the output terminal OUT of the driving circuit.

[0026] see i...

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Abstract

The invention discloses a high-side drive circuit of a high-voltage relay, which belongs to the technical field of integrated circuits. The high-voltage relay high-side drive circuit includes a first input stage, a second input stage, a first drive stage, a second drive stage, a first switch and a second switch; the first input stage and the second input stage The front ends of the first and second drive circuits are connected to the input terminal IN, and the rear ends are respectively connected to the front ends of the first and second drive circuits; the rear ends of the first and second drive circuits are respectively connected to the The control end of a switch and the control end of the second switch; the input end of the first switch is connected to the power supply VDD, and the output end is connected to the input end of the second switch; the output end of the second switch is connected to The output terminal OUT of the driving circuit is connected. In the present invention, the withstand voltage capability of the output terminal is improved, and the failure mode of the output terminal is reduced.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a high-side drive circuit of a high-voltage relay. Background technique [0002] Relay is an automatic switch with isolation function, which is widely used in remote control, telemetry, communication, automation 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 high-side drive circuits such as figure 1 Shown: IN is the command input port. The command controls the switch S after the input stage and the driver stage. The switch S is usually realized by a high-voltage MOSFET ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/08
CPCH03K19/08
Inventor 肖培磊胡小琴朱琪
Owner 58TH RES INST OF CETC
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