A switching power supply circuit with higher reliability

By introducing a combination of primary-side and secondary-side main control circuits into the switching power supply, and combining power supply judgment and temperature detection, the current and power output are dynamically controlled, solving the problem of insufficient adaptability to indoor and outdoor power supply, and improving the reliability and safety of the switching power supply.

CN121863872BActive Publication Date: 2026-06-26SHENZHEN XINZHONG TECH CO LTD
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Patent Information

Application Number
CN202610318750.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-16
Publication Date
2026-06-26
Estimated Expiration
2046-03-16

AI Technical Summary

Technical Problem

Existing switching power supplies do not differentiate between indoor and outdoor power supply environments, leading to long-term high-power operation of indoor circuits, which can cause safety hazards such as overheating, overheating, and even fires. In addition, the power supply line adaptability is insufficient.

Method used

The system employs a combination of primary and secondary main control circuits, uses an isolation communication module to determine indoor and outdoor power supply, reduces the load on indoor power lines, and combines PFC voltage regulation and temperature detection modules to dynamically control current and power output, thereby achieving closed-loop control of voltage and current loops.

Benefits of technology

It improves the reliability and safety of switching power supplies, avoids the risk of high-power operation of indoor circuits, enhances power utilization and output power accuracy, and ensures user safety.

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Abstract

The application provides a switching power supply circuit with higher reliability, comprising a primary side master control circuit, a secondary side master control circuit and an isolation communication module, the primary side master control circuit comprises a first control module, a PFC voltage regulation output circuit, a second conversion module and a PFC controller; the secondary side master control circuit comprises a second control module, and an indoor and outdoor power supply judgment module and an output voltage and current detection module connected with the second control module respectively, wherein the PFC controller controls the PFC voltage regulation output circuit to output stable conversion voltage, the second control module controls the output of the second conversion module according to the detection value of the output voltage and current detection module to realize voltage and current loop closed loop control, the second control module obtains the detection result of the indoor and outdoor power supply judgment module, and the second control module controls current derating output when supplying power for an indoor power supply line. The application can improve the safety of power utilization.
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