开关电源系统、过流补偿模块、控制电路及过流补偿方法
By introducing an overcurrent compensation module and control circuit into the switching power supply system and adjusting the overcurrent protection voltage, the problem of instability at the overcurrent point caused by input voltage changes is solved, and precise control and stability of overcurrent protection are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CRM ICBG (WUXI) CO LTD
- Filing Date
- 2021-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
In the prior art, the instability of the actual overcurrent protection point caused by input voltage variation is a problem, especially in AC-DC power supply systems with flyback topologies, where the overcurrent protection point changes with the input voltage, affecting the stability of the system.
An overcurrent compensation module for a switching power supply is adopted, including a first compensation module and a second compensation module. By charging and discharging the overcurrent protection voltage in the on and off states of the power switching transistor, the overcurrent protection voltage is gradually adjusted using a multi-stage compensation module to overcome the influence of input voltage changes.
It achieves precise control of the overcurrent point under different input voltage conditions, improves the stability and accuracy of overcurrent protection, and reduces the impact of delay time on the overcurrent point.
Smart Images
Figure CN115276385B_ABST