Switching power supply circuit and electronic device
By designing a switching power supply circuit that shares a single transformer and utilizing the interlocking mechanism of the PWM controller and switching devices, the problems of high cost and large footprint in existing technologies are solved, achieving cost reduction and space saving.
CN224343101UActive Publication Date: 2026-06-09ZHENHUA RESEARCH INSTITUTE (GUIYANG) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENHUA RESEARCH INSTITUTE (GUIYANG) CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
In the prior art, equipping electronic devices with two startup power supplies requires two transformers, resulting in high costs and large footprint.
Method used
Design a switching power supply circuit that allows two starting power supplies to share a single transformer. Through the interlocking mechanism of the PWM controller and switching devices, the other power supply is not working when one power supply is working, and the power supply voltage is generated using a single transformer.
Benefits of technology
It reduces operating costs and the footprint of the circuitry, while ensuring that electronic devices can still function properly in the event of a power failure.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224343101U_ABST
Abstract
This application provides a switching power supply circuit and electronic device. The switching power supply circuit includes: a first primary winding, a second primary winding, a secondary winding, a first switching device, and a second switching device. The first primary winding is connected in series with the first switching device and is connected to a first power input point. The second primary winding is connected in series with the second switching device and is connected to a second power input point. A first PWM controller is connected to the control terminal of the first switching device. A second PWM controller is connected to the control terminal of the second switching device. When power is connected to both the first and second power input points, one of the first and second PWM controllers is enabled, while the other is disabled. This reduces the number of transformers used, lowers operating costs, and reduces the circuit footprint.
Need to check novelty before this filing date? Find Prior Art