A wide voltage input protection circuit for voltage lifting of MOS transistor

By introducing a floating ground circuit and a filter capacitor into the MOSFET circuit, the stability problem of the MOSFET drive circuit over a wide voltage range is solved, achieving high reliability and low failure rate, making it suitable for scenarios such as electrical control of engineering machinery and electric vehicles.

CN224305412UActive Publication Date: 2026-05-29WUXI TAILIANXIN TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WUXI TAILIANXIN TECHNOLOGY CO LTD
Filing Date
2025-07-14
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The existing MOSFET drive circuits have a limited voltage input range and cannot adapt to voltage fluctuations of 18V to 32V, which makes the devices prone to damage and affects the circuit's load capacity and reliability.

Method used

A floating ground circuit is adopted, which uses Zener diodes and voltage divider resistors to generate a floating ground that varies with the power supply voltage fluctuations, ensuring that the gate-source voltage of the PMOS transistor is within a safe range. Combined with a filter capacitor, high-frequency noise is filtered out, and a stable DC voltage is provided.

Benefits of technology

It significantly improves the power adaptability and reliability of MOSFET circuits, reduces the failure rate caused by power fluctuations, simplifies circuit design, reduces maintenance costs, and improves the stable operation of industrial automation equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a MOS tube circuit, especially a kind of wide voltage input protection circuit for the voltage lifting of MOS tube, comprising: power input end, for receiving input voltage in wide voltage range;Filtering capacitor C1 is connected with the power input end;Floating ground circuit, including voltage stabilizing diode D1 and voltage dividing resistor R1, the cathode of voltage stabilizing diode D1 is connected with the power input end, the anode of voltage stabilizing diode D1 is connected with filtering capacitor C1 and voltage dividing resistor R1, the anode of voltage stabilizing diode D1 is as floating ground GND_D, voltage dividing resistor R1 is connected with base circuit GND, to make the anode of voltage stabilizing diode as the reference ground of PMOS tube gate control signal.The utility model provides a kind of wide voltage input protection circuit for the voltage lifting of MOS tube through floating ground circuit, significantly improves MOS tube circuit power adaptability and operating reliability.
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