A soft start control circuit based on output voltage feedback

By introducing an output voltage feedback mechanism into the soft-start circuit and using buffer and control circuits to form a feedback loop, the problems of slow response speed and output voltage overshoot in traditional soft-start circuits are solved, achieving smooth voltage curve and precise soft-start time control.

CN224385074UActive Publication Date: 2026-06-19NANJING ZHILINGXIN TECH CO LTD +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NANJING ZHILINGXIN TECH CO LTD
Filing Date
2025-06-10
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Traditional soft-start circuits have slow response speeds and lack feedback mechanisms, resulting in output voltage overshoot and uncontrollable soft-start time.

⚗Method used

A soft-start control circuit based on output voltage feedback is adopted. A feedback loop is formed by a buffer circuit and a control circuit. High-precision voltage control is achieved through an operational amplifier and a voltage divider component to ensure a smooth voltage curve and avoid overshoot. The soft-start time is precisely controlled by a drive voltage detection circuit.

🎯Benefits of technology

This improves system response speed, avoids output voltage overshoot, and enables precise control of the charging process and controllable soft-start time.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of soft-start control circuit based on output voltage feedback, soft-start control circuit includes buffer circuit and control circuit, the buffer circuit includes operational amplifier;The buffer circuit is used to prevent the overshoot phenomenon of output voltage, makes output voltage curve change smooth;The control circuit includes capacitor, control tube, voltage divider component and discharge tube, the capacitor is connected with the drain of the discharge tube and the operational amplifier, the voltage divider component is connected with the capacitor and the control tube respectively;The control circuit is used to control soft-start time.The utility model can improve the response speed of soft-start control circuit, avoid appearing output voltage overshoot phenomenon;And it can accurately control soft-start time, effectively controllable limit in power-on process inrush current.
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