Gate drive circuit without static power consumption

Abstract

The invention discloses a gate drive circuit without static power consumption, and belongs to the technical field of electronic circuits. A floating power supply ground module is used for generating afloating power supply ground signal and a high side reset signal, wherein a low voltage-high voltage level shifting module is used for shifting a low voltage driving signal of a front stage to a highvoltage side to control a high side power transistor; a high voltage-low voltage level shifting module is used for feeding back a high side signal of the floating power supply to a low side, and closing an input stage in the low voltage-high voltage level shift module through a logic control module to ensure that the gate drive circuit provided by the invention is free from static power consumption; and a drive output module drives the high side power transistor and a low side power transistor respectively by using the high side drive output unit and the low side drive output unit, and the logic control module provides logic control. The gate drive circuit is free from static power consumption, and meanwhile the problem of voltage resistance of a gate source is solved well.

Description

technical field [0001] The invention relates to electronic circuit technology, in particular to a gate drive circuit without static power consumption. Background technique [0002] Gate drive circuits are involved in many chips, such as DC / DC converters, LED drivers, motor drivers, and Class D audio amplifiers. The traditional gate drive circuit is the level shifter (level shift) + inverter cascaded driving method, such as figure 1 As shown, this driving method has the following two disadvantages: [0003] 1. The circuit has static power consumption, which is not suitable for low power consumption systems. [0004] 2. The gate-source withstand voltage of the MOS tube. Since the cascade drive of the inverter is used, the withstand voltage between the gate and the source of the MOS tube must be greater than the power supply voltage, which will be limited by the process. [0005] Therefore, it is necessary to design a gate drive circuit with low static power consumption and ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above disadvantages, the present invention provides a gate drive circuit without static power consumption, which is driven by a floating power supply mode, and the high-side power tube HMP and the low-side power tube HMN are driven separately, which is a good solution The problem of gate-source withstand voltage

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