CN211959179U

CN211959179U - Isolation driving electronic switch module

Info

Publication number: CN211959179U
Application number: CN202020284761.5U
Authority: CN
Inventors: 刘丛森; 吴晓; 黄国锋
Original assignee: Shanghai Yingzhi Technology Co Ltd
Current assignee: Shanghai Yingzhi Technology Co Ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-11-17
Anticipated expiration: 2030-03-10

Abstract

The utility model relates to an electronic switch technical field specifically is an isolation drive electronic switch module, including DC unit, high-speed opto-coupler drive unit and MOS unit are all installed on DC unit, DC unit is the isolation power, the isolation power is used for being the drive circuit power supply, high-speed opto-coupler drive unit passes through opto-coupler device and triode and constitutes, be used for driving the MOS unit, the MOS unit is N type MOS pipe, the MOS pipe is used for controlling opening and close of external circuit, whole module is applicable to the high-speed on-off control of circuit, control end and output electrical isolation, no common ground operation requirement, can establish ties the use wantonly, it is small to possess, the characteristics that switching frequency is high.

Description

Isolation driving electronic switch module

Technical Field

The utility model relates to an electronic switch technical field specifically is an keep apart drive electronic switch module.

Background

In the design of the switch drive of the circuit, an N-type MOS tube with a large load is generally selected as a main switch device, the conduction principle of the N-type MOS tube is that a G pole of the N-type MOS tube is applied with a conduction threshold voltage Vgs, wherein an S pole of the N-type MOS tube is used as a potential reference, when the S pole is connected with a system ground, the G pole of the N-type MOS tube can be a fixed level, but when the S pole is connected with a non-system ground, the G pole drive needs a drive level which is fixed relative to the S pole; when the N-type MOS tube is loaded or unloaded, the system current fluctuation is large, interference is easily caused to be conducted to the control end through a circuit, control signals are abnormal, and the use is inconvenient. In view of this, we propose an isolated drive electronic switch module.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an keep apart drive electronic switch module to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an isolation drive electronic switch module comprises a DC/DC unit, a high-speed optical coupler drive unit and an MOS unit, wherein the high-speed optical coupler drive unit and the MOS unit are both arranged on the DC/DC unit;

the high-speed optical coupler driving unit consists of an optical coupler and a triode and is used for driving the MOS unit;

the DC/DC unit is an isolation power supply which is used for supplying power to the driving circuit;

the MOS unit is an N-type MOS tube, and the N-type MOS tube is used for controlling the on-off of an external circuit;

the D pole of the N-type MOS tube is a switch positive pole, and the S pole of the N-type MOS tube is a switch negative pole;

pins

3 and 1 of the triode are respectively connected with a G pole and an S pole of the N-type MOS tube, and pin 2 of the triode is connected with pin 7 of the optocoupler through a pull-up resistor of 10K omega;

pins

4 and 3 of the isolation power supply are respectively connected with

pins

8 and 5 of the optocoupler;

the 4 pins of the isolation power supply are also connected with the 3 pins of the triode through a pull-up resistor of 350 omega;

the pin 3 of the isolation power supply is also connected with the pin 1 of the triode and the S pole of the N-type MOS tube;

a pin 1 of the optocoupler is connected with an external control power supply through a resistor 1K;

and 2 pins of the optocoupler device are used for connecting external control signals.

Preferably, the type of the optocoupler is HCPL-0630, the type of the triode is S8050, and the type of the isolation power supply is B1205S-W2R 2.

Compared with the prior art, the beneficial effects of the utility model are that: the isolation driving electronic switch module is suitable for high-speed switch control of a circuit, can effectively solve the interference problem by electrically isolating control input and N-type MOS (metal oxide semiconductor) tube output, has no common ground use requirement, can be randomly used in series, and has the characteristics of small volume and high switching frequency.

Drawings

FIG. 1 is a block diagram of the overall structure of the present invention;

fig. 2 is a circuit diagram of the overall structure of the present invention.

In the figure: 100. a DC/DC unit; 200. a high-speed optocoupler drive unit; 300. and a MOS unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of this patent, it is noted that the terms "connected" and "connected," unless otherwise expressly specified or limited, are intended to be broadly construed, and can for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

The utility model provides an keep apart drive electronic switch module, as shown in figure 1, including DC/DC unit 100, high-speed opto-coupler drive unit 200 and MOS unit 300 are all installed on DC/DC unit 100, DC/DC unit 100 is isolation power, isolation power is used for supplying power for drive circuit, high-speed opto-coupler drive unit 200 passes through opto-coupler device and triode and constitutes, be used for driving MOS unit 300, MOS unit 300 is N type MOS pipe, N type MOS pipe is used for controlling the opening and close of external circuit, whole module is applicable to the high-speed on-off control of circuit, control end and output electrical isolation, no common ground operation requirement, can use in series connection wantonly, it is small to possess, the high characteristics of switching frequency.

In the embodiment, the model of the optocoupler is HCPL-0630, the model of the triode is S8050, the model of the isolation power supply is B1205S-W2R2, and a matching circuit and a power supply of the electrical element are also provided by the manufacturer; furthermore, the present invention relates to circuits, electronic components and modules, which are known in the art, and can be implemented by those skilled in the art without exception, and the present invention also does not relate to improvements to software and methods.

As shown in fig. 2, the D electrode of the N-type MOS transistor is a switch positive electrode, and the S electrode of the N-type MOS transistor is a switch negative electrode;

pins

4 and 3 of the isolation power supply are respectively connected with

pins

8 and 5 of the optocoupler;

and a pin 2 of the optical coupler device is used for connecting an external control signal.

The isolation drive electronic switch module of this embodiment is when using, the isolation drive electronic switch wholly passes through DC/DC unit 100, high-speed opto-coupler drive unit 200 and MOS unit 300 are constituteed, wherein, high-speed opto-coupler drive unit 200 and MOS unit 300 are all installed on DC/DC unit 100, DC/DC unit 100 is the isolation power supply, the isolation power supply is used for supplying power for drive circuit, high-speed opto-coupler drive unit 200 passes through opto-coupler device and triode and constitutes, be used for driving MOS unit 300, MOS unit 300 is N type MOS pipe, N type MOS pipe is used for controlling opening and close of external circuit, it is specific:

when the input signal of the pin 2 of the optical coupler device is low level, the input end of the optical coupler device is connected, the pin 7 of the output end of the optical coupler device is pulled down, the

pins

1 and 3 of the triode are disconnected, the level of the G pole of the N-type MOS tube is pulled up, and the D, S pole of the N-type MOS tube is connected;

when the input signal of the 2 pin of the optical coupler device is at a high level, the input end of the optical coupler device is not conducted, the 7 pin of the output end of the optical coupler device is pulled high, the 1 pin and the 3 pin of the triode are connected, the G pole level of the N-type MOS tube is pulled low, and the D, S pole of the N-type MOS tube is disconnected;

when the 2 pin input signal of opto-coupler device is PWM pulse signal, N type MOS pipe follows the PWM signal and carries out high-speed on-off control, adjust the duty cycle of PWM signal and just also changed the on/off time ratio of N type MOS pipe switch, reach the purpose of meticulous regulation, and carry out electrical isolation to control input and N type MOS pipe output and can effectively solve the interference problem, do not have common ground operation requirement, can use by random series connection, possess small, the high characteristics of switching frequency, be convenient for popularize and promote.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An isolated drive electronic switch module, comprising a DC/DC unit (100), a high-speed optical coupling drive unit (200) and a MOS unit (300), characterized in that: the high-speed optical coupling driving unit (200) and the MOS unit (300) are both arranged on the DC/DC unit (100);

the high-speed optical coupler driving unit (200) consists of an optical coupler and a triode and is used for driving the MOS unit (300);

the DC/DC unit (100) is an isolated power supply which is used for supplying power to the driving circuit;

the MOS unit (300) is an N-type MOS tube, and the N-type MOS tube is used for controlling the on-off of an external circuit;

pins 3 and 1 of the triode are respectively connected with a G pole and an S pole of the N-type MOS tube, and pin 2 of the triode is connected with pin 7 of the optocoupler through a pull-up resistor of 10K omega;

pins 4 and 3 of the isolation power supply are respectively connected with pins 8 and 5 of the optocoupler;

a pin 1 of the optocoupler is connected with an external control power supply through a resistor of 1K omega;

2. The isolated drive electronic switch module of claim 1, wherein: the type of the optocoupler device is HCPL-0630, the type of the triode is S8050, and the type of the isolation power supply is B1205S-W2R 2.