A synchronous rectification circuit and switching power supply
By introducing isolation transmission and inverting drive circuits into the synchronous rectifier circuit, the common problem of secondary freewheeling diodes in deep CCM mode in forward topology is solved, ensuring the reliability and stability of the system.
CN224418694UActive Publication Date: 2026-06-26GUANGZHOU XUZHIYUAN TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU XUZHIYUAN TECHNOLOGY CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-06-26
Smart Images
Figure CN224418694U_ABST
Abstract
The utility model discloses a kind of synchronous rectification circuit and switching power supply, synchronous rectification circuit includes the isolation transmission circuit, inverting driver circuit and freewheeling tube driving circuit connected in turn;The isolation transmission circuit is for processing and transmission with driving signal;The inverting driver circuit is for the driving signal to be inverted, and control the freewheeling tube driving circuit;The freewheeling tube driving circuit is for according to the stress signal of freewheeling tube, output is used for controlling the freewheeling tube driving signal that freewheeling tube opens or shuts off.The utility model transmits primary side timing to the control freewheeling tube driving logic of secondary side, realize that negative pressure detection chip can use in depth CCM mode, greatly widen the application of negative pressure detection chip in high-power product.
Need to check novelty before this filing date? Find Prior Art