LED driving power supply control circuit and LED lamp by using same

Abstract

The invention relates to an LED driving power supply control circuit. The LED driving power supply control circuit comprises an EMI filter and rectifier module, a DC-DC isolation constant current driver module, an input under-voltage lag protection module, and an output current protection module, wherein the EMI filter and rectifier module is used for performing EMI filter and full-wave rectification on an alternating-current voltage input by a power supply to generate a direct-current voltage; the DC-DC isolation constant current driver module is used for processing the direct-current voltage so as to generate a constant output current for the work of the LED power supply; the input under-voltage lag protection module is used for clamping and splitting the direct-current voltage so as togenerate an enable signal and controlling the DC-DC isolation constant current driver module to start or not to start according to the enable signal; and the output current protection module is used for detecting the constant output current and controlling the DC-DC isolation constant current driver module to stop generating the output current while the constant output current exceeds a current threshold. The invention also relates to an LED lamp. The LED driving power supply control circuit and the LED lamp realize the alternating-current inputting and constant-current outputting in a wide range and have the input clamping lag protection and the output overvoltage protection functions.

Description

technical field [0001] The invention relates to the technical field of lighting, more specifically, to an LED driving power supply control circuit and an LED lamp using the circuit. Background technique [0002] LED light sources have the advantages of high efficiency, energy saving, long life, and low-voltage controllability, so they are widely used in various lighting fields. In practical applications, the driving current of the LED light source has a direct impact on the luminous efficiency and lifetime. [0003] Considering the particularity of the use environment, the on-board power supply network is different from the common mains power supply. The on-board power supply system may supply power to multiple load devices at the same time, resulting in large fluctuations in output voltage. big. At the same time, the current marine LED lamps are only suitable for narrow input voltage ranges, resulting in poor vibration resistance, low luminous efficiency, short life, shor...

AI Technical Summary

Problems solved by technology

[0003] Considering the particularity of the use environment, the on-board power supply network is different from the common mains power supply. The on-board power supply system may supply power to multiple load devices at the same time, resulting in large fluctuations in output voltage. Big

At the same time, the current marine LED lamps are only suitable for narrow input voltage ranges, resulting in poor vibration resistance of LED light sources, low luminous efficiency, short life, short maintenance cycles, insufficient protection functions, and large EMI interference, so they are not suitable for use on ships. long-term use

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