High-end power control circuit based on digital logic and anti-interference method

Abstract

The invention discloses a high-end power control circuit based on digital logic and an anti-interference method. The high-end power control circuit comprises a digital trigger module, the output end of the digital trigger module is connected with the grid electrode of the first PMOS tube and the grid electrode of the second PMOS tube at the same time, and the control end of the digital trigger module is connected with the output end of the output drive circuit. And at the moment, the digital trigger module takes an output signal of the output driving circuit as a clock control signal, so that the digital trigger module is triggered when the output signal is in a rising edge time period, and the output end of the digital trigger module is always in a low level state. The anti-interference method is carried out based on the high-end power control circuit, so that the drain potential of the first LDMOS tube is pulled up when the output signal is in the rising edge stage, and the noise pulse width is reduced. The high-end power control circuit has the advantages of being simple in structure and small in chip size, and noise interference is more effectively eliminated through the high-end power control circuit and the anti-interference method.

Description

technical field [0001] The invention relates to the technical field of electronics and microelectronics, in particular to a digital logic-based high-end power control circuit and an anti-interference method. Background technique [0002] Power integrated circuits are an important product of the combination of electronic technology and microelectronic technology. The power integrated circuit includes a main chip, an interface circuit, a power control circuit, a protection circuit, a detection circuit, and a high-voltage power device, etc., and can simultaneously realize information collection, amplification, processing, and loading. And because of its advantages of strong reliability and small size, it is widely used in aerospace, new energy and smart home and other fields. [0003] The power control circuit is the core component of the power integrated circuit, and the high-end power control circuit is the core component of the power control circuit. The high-end power con...

AI Technical Summary

Problems solved by technology

[0004] The high-end level shift circuit is mainly composed of LDMOS transistors and resistors connected in series, but affected by the manufacturing process of the LDMOS transistor itself, there is a parasitic capacitance in its drain

However, when the floating reference of the circuit changes, noise interference will be generated. At this time, the noise will form a path to the ground through the parasitic capacitance. If the noise is too large, a large voltage drop will be formed on the load resistance.

At this time, the post-stage circuit will mistake the noise as a normal signal and transmit it downward, which will cause the power integrated circuit to lock up, and even cause the entire power integrated circuit to burn out

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