一种LDO高精密过流保护电路
By introducing a bias circuit and an overcurrent comparator circuit into the LDO circuit, and using the positive temperature coefficient current to generate an overcurrent threshold point that does not change with temperature, the problem of low accuracy of traditional LDO overcurrent protection modules is solved, and high-precision overcurrent protection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUIZHOU ZHENHUA FENGGUANG SEMICON
- Filing Date
- 2025-11-12
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional LDO overcurrent protection modules suffer from issues such as discrete overcurrent protection point thresholds and low accuracy of overcurrent protection points across the entire temperature range, making them unsuitable for high-precision system applications.
By employing a bias circuit, an overcurrent comparator circuit, and a driver stage circuit, an overcurrent threshold point that does not change with temperature is generated using a positive temperature coefficient current, and high-precision overcurrent protection is achieved by adjusting a negative temperature coefficient voltage.
It improves the adjustment accuracy of overcurrent protection points and the stability of the circuit, ensuring overcurrent protection accuracy across the entire temperature range, and is suitable for high-precision systems.
Smart Images
Figure CN121635614B_ABST