Novel optical MOS relay

Abstract

The invention provides a novel optical MOS relay. The novel optical MOS relay is characterized in that an input end is composed of an infrared LED, a pin 1 of the input end is connected with the positive pole of the infrared LED, and a pin 2 of the input end is connected with the negative pole of the infrared LED; an output end is composed of a PDA and an MOSFET integrated with an ESD and a reverse recovery diode, the positive pole of the PDA is connected with the G pole of the MOSFET, and the negative pole of the PDA is connected with the S pole of the MOSFET; the D pole of the MOSFET is connected with a pin 4 and a pin 6 of the output end, and the S pole of the MOSFET is connected with a pin 5 of the output end; the infrared LED, the PDA, the MOSFET, the ESD and the reverse recovery diode are all located in the same plane; the input end and the output end are formed by encapsulating an inner encapsulating material and an outer-layer black encapsulating material which are made of transparent or semitransparent resin. According to the optical MOS relay, the antistatic capacity is improved, withstand voltage of media between the input end and the output end is improved, on-state and switching losses are greatly reduced, and the switching speed is also increased.

Description

technical field [0001] The invention belongs to the technical field of electrical appliances and electronics, and in particular relates to the structure of a photorelay (a solid state relay). Background technique [0002] Solid State Relays (SSR) is a non-contact electronic switch, which uses the switching characteristics of electronic components (such as switching transistors, bidirectional thyristors, MOSFETs and other semiconductor devices) to achieve non-contact and sparkless grounding. The purpose of turning on and off the circuit is to add a DC or pulse signal to its input, and the output can change from the off state to the on state (blocking state when there is no signal), that is, when the voltage is applied between the control pins , the solid state relay is turned on, and when the applied voltage between the control pins is withdrawn, the solid state relay is turned off, thereby realizing the switching function of controlling a large power load from a small power ...

AI Technical Summary

Problems solved by technology

[0007] Conventional MOSFET is an electrostatic sensitive device, its antistatic voltage is generally below 500V, and it is easily damaged by external static electricity interference

[0008] Conventional optical MOSFET structures are generally packaged in a face-to-face structure, and the dielectric withstand voltage between the input and output is generally around 2500V, which cannot meet the requirements of high-insulation industrial control applications.

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