Driving circuit for MOSFET driving

Abstract

The invention relates to the electrical field and particularly relates to a driving circuit for MOSFET driving. The driving circuit includes a switch circuit and a voltage division circuit, wherein afirst end of the switch circuit is connected with a first control end, a second end is connected with the voltage division circuit, a third end is connected with a common ground, the switch circuit isused for leading a gate voltage of an MOSFET to a common ground voltage when the switch circuit is turned on; a first end of the voltage division circuit is connected with a second control end and the switch circuit, a second end is connected with a gate of the MOSFET, a third end is connected with the common ground, and the voltage division circuit is used for increasing the gate voltage of theMOSFET to driving the MOSFET when the switch circuit is turned off. The driving circuit is advantaged in that 1, when the switch circuit is turned on, the gate voltage of the MOSFET can be rapidly ledto the common ground voltage, and rapid turn off of the MOSFET is achieved; and 2, the circuit structure is further simplified, driving of the MOSFET can be achieved only through a triode, and the cost is saved.

Description

technical field [0001] The invention relates to the electrical field, in particular to a driving circuit for MOSFET driving. Background technique [0002] Metal-Oxide Semiconductor Field-Effect Transistor, referred to as Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), is a field-effect transistor (field-effect transistor) that can be widely used in analog circuits and digital circuits ). According to the polarity of its "channel" (working carrier), MOSFET can be divided into two types: "N-type" and "P-type", which are usually called NMOSFET and PMOSFET. Other abbreviations include NMOS, PMOS, etc. . [0003] Due to the advantages of small size, light weight and high efficiency, switching power supply has become more and more popular. Due to the advantages of fast switching speed, easy parallel connection, and low driving power required, MOSFET has become one of the most commonly used power switching devices for switching power supplies. The quality of the dri...

AI Technical Summary

Problems solved by technology

The drive circuit contains 4 triodes, the cost is high, and the response speed of the MOSFET is slow

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