LED lamp and power supply control module thereof

Abstract

The embodiment of the invention provides an LED lamp and a power supply control module thereof. The power supply control module is connected between an external power supply and an LED light source module, and comprises a step-down transformer and a control circuit, wherein a primary winding and a secondary winding of the step-down transformer are respectively connected to the external power supply and the LED light source module and used for converting high-voltage DC voltage input by the external power supply into a predetermined voltage range and then outputting the high-voltage DC voltageto the LED light source module connected with the secondary winding; and the control circuit is connected to the external power supply and the primary winding of the step-down transformer and used forcontrolling the working state of the step-down transformer. The power supply control module provided by the embodiment of the invention carries out control on the step-down transformer through the control circuit, the step-down transformer converts the high-voltage DC voltage input by the external power supply into the predetermined voltage range and then supplies the high-voltage DC voltage to the LED light source module, and the primary winding and the secondary winding of the step-down transformer are mutually isolated, so that the safety of power utilization is effectively guaranteed, andthe power supply for a longer distance can be realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of LED lamps, in particular to an LED lamp and a power control module thereof. Background technique [0002] At present, LED lamps mainly use DC12V or DC24V input voltage. The AC mains power supplied by the mains grid needs to be stepped down by switching power supply and other power supply devices and converted from AC to DC before being input to LED lamps. The LED lamps in the same area are connected in parallel. Due to the different distances from the power supply device, the line loss and voltage drop of the power supply line of the LED lamp farther away from the power device is relatively large. In order to achieve long-distance power supply, most of the power supply devices of LED lamps need to use high-voltage direct current for power supply, and then through the power control module inside the LED lamp to perform step-down processing to achieve power supply, but most of the ...

AI Technical Summary

Problems solved by technology

In order to achieve long-distance power supply, most of the power supply devices of LED lamps need to use high-voltage direct current for power supply, and then through the power control module inside the LED lamp to perform step-down processing to achieve power supply, but most of the existing power control modules use voltage conversion chips Step-down processing, so the input and output of the power supply will be in the same circuit, and the effective isolation between the input and output of the power supply cannot be achieved, resulting in poor safety of the overall circuit, which is not conducive to installation and maintenance. Moreover, the current Some voltage conversion chips generally can only step down the power supply device whose output voltage is less than DC48V, so the distance of power supply still has certain limitations.

Images