A high-voltage gate drive circuit with anti-noise

Abstract

An anti-noise high-voltage gate drive circuit belongs to the technical field of analog integrated circuits. It includes a high-voltage level shift module, a common-mode noise elimination circuit, an RS latch and a drive module. The high-voltage level shift module improves the signal level through LDMOS tubes, and converts the input two-way low-voltage pulse control signals. The high voltage pulse signal is output to the common mode noise cancellation circuit together with the high voltage common mode signal. The common mode noise cancellation circuit uses the principle of the differential mode amplifier to eliminate the common mode noise. The RS latch and the drive module will eliminate the noise. The pulse signal is converted into an output signal for driving the high-side power tube. The invention can eliminate various common mode interference noises, can be applied to narrower narrow pulse input signals, and has lower circuit power consumption.

Description

technical field [0001] The invention belongs to the technical field of analog integrated circuits, and relates to an anti-noise high-voltage gate drive circuit. Background technique [0002] In power chips or integrated circuit driver chips, there are high-voltage gate drive circuits, which use high-voltage level shift technology to realize the conversion from low voltage to high voltage to drive high-side power transistors. The high-voltage gate drive circuit is a typical circuit of the high-voltage integrated circuit (HVIC). This type of high-voltage gate drive circuit has a wide range of applications in the fields of motor drive, flat panel display and other consumer electronics. The low-voltage control signal is converted into a high-voltage control signal to drive the high-end circuit to work. Generally, this type of high-voltage gate drive circuit system adopts a half-bridge topology. [0003] The half-bridge driver chip is mainly used to drive the power tube of the e...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of interference noise, narrow pulse width requirement and power consumption in the above-mentioned traditional high-voltage gate drive circuit, the present invention provides a high-voltage gate drive circuit capable of resisting noise interference, so as to eliminate common-mode noise interference without Affects the transmission of normal signals, lower power consumption and can be applied to narrower narrow pulse signals

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