Feedback circuit, method and isolated switching power supply applying the same
CN114465461BActive Publication Date: 2026-07-07XIAN SILERGY SEMICON TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN SILERGY SEMICON TECH CO LTD
- Filing Date
- 2021-12-31
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
Existing isolated switching power supplies have relatively large optocoupler currents under light load and no-load conditions, resulting in high power consumption and affecting efficiency.
Method used
By designing a secondary feedback module in the feedback circuit to convert the load current signal into an intermediate signal, and using an optocoupler circuit to make the optocoupler feedback current have the same trend as the load current, the optocoupler feedback current can be reduced under light load and no-load conditions, thereby reducing losses.
Benefits of technology
It effectively reduces the power consumption of isolated switching power supplies under light load and no-load conditions, and improves the overall efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN114465461B_ABST
Abstract
The application discloses a feedback circuit and an isolated switching power supply applying the same. By making the photocoupling feedback current and the load current have the same variation trend, the photocoupling feedback current is very small or even zero at light load and no load, so as to reduce or eliminate the loss caused by the photocoupling feedback current at light load and no load, and greatly reduce the light load and no load power consumption of the whole machine.
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