Electronic relay and its control method

Abstract

The invention discloses an electronic relay and a control method of the electronic relay. The electronic relay comprises a control input device, an input circuit, an integrated circuit, a main control circuit, a drive circuit and a high-power switching tube, wherein the output end of the control input device is connected with the main control circuit, the input end of the input circuit is connected with a power supply, the output end of the input circuit is connected with the main control circuit, the first control end of the main control circuit is connected with the controlled end of the high-power switching tube through the drive circuit, the second control end of the main control circuit is connected with the integrated circuit, the high-power switching tube is connected between the power supply and a load in series, and the high-power switching tube is an NMOS tube. According to the scheme, the NMOS tube is adopted, and the load is connected to the lower portion of the NMOS tube. The integrated circuit boosts the voltage and then outputs the boosted voltage to the drive circuit, and therefore the drive circuit has the voltage and current large enough to drive the NMOS tube to work. The main control circuit controls the working state of the integrated circuit and the working state of the drive circuit, and therefore the NMOS tube is indirectly controlled. The electronic relay and the control method of the electronic relay are suitable for circuit control of automobiles and gasoline and diesel engines.

Description

technical field [0001] The invention relates to circuit control equipment, in particular to an electronic relay used in automobiles and a control method thereof. Background technique [0002] The birth of automobiles has a history of nearly a hundred years. As a traditional component of automobile electrical appliances, relays play an indispensable role in the use of automobiles. However, many years of practice have proved that the traditional mechanical relay has the following significant disadvantages: First, it has a single function and can only play the role of switching the power supply. The principle of electrical appliances or related standards to work, so it caused a lot of undue damage to the car electrical appliances. Secondly, most of the relays currently used in automobiles are traditional mechanical relays. Because they are often impacted by high-voltage arcs, the contacts of mechanical relays and the conductive sheets often adhere due to ablation. Cause the b...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the technical problem that the N-channel FET can not be used as the switching tube in the prior art to realize the layout control on the upper load and the lower, especially the high-power N-channel FET in the pulse width modulation mode. application, providing an electronic relay that can output a higher voltage to drive a high-power N-channel FET connected to the load, and the invention also provides a method for controlling the electronic relay, so that the internal control of the electronic relay Voltage remains stable

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