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High-voltage relay high-side driving circuit

A high-voltage relay and drive circuit technology, applied in the direction of logic circuits using semiconductor devices, logic circuits using specific components, etc., can solve problems such as insufficient voltage resistance, achieve high voltage withstand capability, reduce failure modes, and improve reliability. Effect

Active Publication Date: 2020-04-17
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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  • High-voltage relay high-side driving circuit

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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 driver stage, a second driver 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 Connected to the input terminal IN, the back end is respectively connected to the front end of the first drive circuit and the second drive circuit; the back end of the first drive circuit and the second drive circuit are respectively connected to the first switch S1 The control terminal of the second switch S2 is connected to 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 of the second switch S2 The terminal is connected with the output terminal OUT of the driv...

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Abstract

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

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a high-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] The traditional high-voltage relay high-side drive circuit such as figure 1 Shown: IN is the command input port, and the command controls the switch S after passing through the input stage and the driver stage. The switch S is usually implemented...

Claims

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Application Information

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Patent Type & Authority Applications(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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