Low cost overvoltage protection circuit
By using a cascaded connection of capacitor array, tip discharge, resistor voltage divider and ferrite bead filter module in the overvoltage protection circuit, the high cost problem in the prior art is solved, and low-cost multi-layer overvoltage suppression and high-frequency signal absorption are achieved, avoiding high-voltage interference coupling.
CN224481461UActive Publication Date: 2026-07-10SHENZHEN AIJINGYUAN TECHNOLOGY CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN AIJINGYUAN TECHNOLOGY CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-10
AI Technical Summary
Technical Problem
Existing overvoltage protection circuits use high-power overvoltage protectors and high-voltage, high-capacity capacitors, resulting in high costs and hindering large-scale promotion.
Method used
The capacitor array module, tip discharge module, resistor voltage divider module and ferrite bead filter module are cascaded to replace the traditional TVS and large-capacity capacitors. The series capacitors increase the withstand voltage, disperse and consume high voltage energy, and suppress transient overvoltage.
Benefits of technology
Multi-layer overvoltage suppression is achieved, reducing circuit costs while maintaining the ability to absorb high-frequency and low-frequency signals, thus preventing high-voltage interference from coupling to other circuits.
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Figure CN224481461U_ABST
Abstract
The utility model relates to EMC electromagnetic compatibility technical field, concretely is a kind of low-cost overvoltage protection circuit, connect between power input positive and negative pole and circuit output positive and negative pole, comprising: capacitor array module, sharp end discharge module, resistance voltage division module and magnetic bead filter module;The input end of capacitor array module connects power input positive and negative pole, the output of capacitor array module is connected sharp end discharge module, resistance voltage division module and magnetic bead filter module in proper order, and the output of magnetic bead filter module connects circuit output positive and negative pole.Through above-mentioned mode, four-module cascade realizes multilayer overvoltage suppression, replaces traditional TVS and large capacity capacitor, reduces cost.
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