A drive voltage blocking circuit for a portable power supply
By designing a drive voltage blocking circuit in a portable power supply and using a voltage detection module and a protection module to block the drive signal, the problem of MOSFET performance fluctuation and damage caused by unstable drive voltage is solved, thus improving the reliability and stability of the power supply.
CN224537776UActive Publication Date: 2026-07-21厦门海索科技有限公司
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 厦门海索科技有限公司
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Unstable drive voltage in portable power supplies can cause fluctuations in MOSFET performance, changes in switching speed, signal delay, overheating, and device damage. In particular, a momentary drop in drive voltage can damage the MOSFET.
Method used
Design a drive voltage blocking circuit, including a voltage detection module and a protection module. By detecting the drive voltage of the drive chip, the drive signal can be blocked in a timely manner to prevent the MOSFET from operating in a low drive voltage and high conduction current situation for a long time.
Benefits of technology
This effectively avoids performance degradation and damage to MOSFETs due to low drive voltage, ensuring power supply reliability and stability, and extending service life.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224537776U_ABST
Abstract
The utility model discloses a drive voltage lockout circuit for portable power supply, and the lockout circuit comprises a drive chip, a voltage detection module and a protection module of the portable power supply. The voltage detection module is connected to the drive chip of the portable power supply, and the voltage detection module detects the back-stage drive voltage VCC of the drive chip of the portable power supply. Whether the voltage detection module is turned on or not is determined according to the size of the back-stage drive voltage VCC. The protection module is connected to the voltage detection module and the drive chip of the portable power supply. The protection module is turned on after the voltage detection module is turned on, and the back-stage drive signal of the drive chip of the portable power supply is locked. The drive voltage lockout circuit for the portable power supply can quickly turn off the MOS tube when the voltage is temporarily reduced, thereby ensuring the reliability of the mobile power supply.
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