UV-LED lamp constant current control circuit

Abstract

A UV-LED lamp constant-current control circuit comprises a main control circuit, a DC-DC step-down circuit, a driving power supply circuit, a current detection circuit, an input detection circuit anda communication circuit, the main control circuit comprises a main control chip U2; the DC-DC step-down circuit is connected with the main control circuit and is used for converting direct-current voltage output by an external AC-DC power supply into constant-current output to drive multiple paths of UV-LED lamps to work; the driving power supply circuit is connected with the main control circuitand the DC-DC voltage reduction circuit; the current detection circuit is connected with the DC-DC voltage reduction circuit and the main control circuit, the input detection circuit is connected withthe main control circuit, and the communication circuit is used for receiving an external communication signal through an RS485 communication interface and transmitting the external communication signal to the main control circuit. The UV-LED lamp constant current control circuit provided by the invention is adjustable in output current, free of overshoot current, good in stability and high in compatibility, and also has multiple circuit protection functions.

Description

technical field [0001] The invention relates to the technical field of UV-LED power supply control, in particular to a UV-LED lamp constant current control circuit. Background technique [0002] The traditional UV-LED lamp constant current circuit is controlled by hardware closed-loop, and the output current of the power supply needs to be adjusted by modifying the hardware parameters. It is extremely inconvenient to adjust the output current, and the flexibility is poor. Generally, different parameters need to be selected according to the actual number of lamp beads in series. DC power supply, poor compatibility. In addition, most of the existing UV-LED power supplies are low-power power supplies. If a high-power power supply is to be produced, the cost is high, troubleshooting is extremely difficult, and the reliability is poor. Contents of the invention [0003] In order to solve the shortcomings of the prior art, the present invention discloses a UV-LED lamp constant ...

AI Technical Summary

Problems solved by technology

[0002] The traditional UV-LED lamp constant current circuit is controlled by hardware closed-loop, and the output current of the power supply needs to be adjusted by modifying the hardware parameters. It is extremely inconvenient to adjust the output current, and the flexibility is poor. Generally, different parameters need to be selected according to the actual number of lamp beads in series. DC power supply, poor compatibility

In addition, most of the existing UV-LED power supplies are low-power power supplies. If a high-power power supply is to be produced, the cost is high, troubleshooting is extremely difficult, and the reliability is poor.

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