Power supply circuit and lamp

By designing a power circuit that includes chip capacitors and chip inductors, and through a specific filtering connection relationship, the problem that existing LED driver power supplies cannot meet the conduction and radiation testing standards under miniaturization, achieving the miniaturization of the power circuit size and the satisfaction of the test standards.

CN222674527UActive Publication Date: 2025-03-25SHENZHEN SUNRICHER TECH CO LTD
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Patent Information

Application Number
CN202421225317.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-30
Publication Date
2025-03-25
Estimated Expiration
2034-05-30

AI Technical Summary

Technical Problem

Existing LED driver power supplies cannot meet the standards of conduction test and radiation test when they meet the miniaturization.

Method used

A power supply circuit is designed, including a first capacitor module, a second capacitor module, an inductance module and a constant current module. Through the use of chip capacitors and chip inductors, the size of the power supply circuit is reduced, and the voltage output from the power supply power is filtered through a specific connection relationship to meet the standards of conduction test and radiation test.

Benefits of technology

It realizes the size of the power supply circuit, and meets the standards of conduction testing and radiation testing, and is suitable for space-constrained application scenarios such as magnetic guide rail lamps.

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Abstract

The utility model belongs to the field of electronic circuits, and provides a power supply circuit and a lamp. The power supply circuit comprises a first capacitor module, a second capacitor module, an inductor module and a constant current module, the first end of the first capacitor module is connected with the first end of the inductor module and the positive electrode of the power supply, and the second end of the first capacitor module is connected with the second end of the inductor module and the negative electrode of the power supply. The third end of the inductance module is connected with the first end of the second capacitor module and the first end of the constant current module, the fourth end of the inductance module is connected with the second end of the second capacitor module and the second end of the constant current module, and the third end of the constant current module is connected with the positive electrode of the light-emitting device. The fourth end of the constant-current module is connected with the cathode of the light-emitting device; wherein capacitors in the first capacitor module and the second capacitor module are chip capacitors, and inductors in the inductor module are chip inductors. The power supply circuit provided by the utility model can meet the standards of conduction test and radiation test under the condition that the size is miniaturized.
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