LED landscape lighting drive circuit design

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In the context at home and abroad to promote environmental protection and energy saving, along with significant progress in recent years, LED luminous efficiency, life and light color on the semiconductor light-emittin g diode (LED) with energy saving, long life, drive many kinds of light color The advantages have been widely used in landscape lighting, digital traffic information display, to ease identification, outdoor full color display and illumination less demanding indoor and outdoor lighting, and other fields.

For the application status of the downlight led in the city lighting, I use the power electronic rectifier and constant current design produced a LED landscape lighting, it has a low-cost, reliable, long life, simple control, according to the actual needs expansion.

A low-power LED driver

Low-power LED products widely used in the form of two drive circuit, constant current driver and regulator driven. The former circuit output current is constant, the output voltage changes with the load; which the output voltage is fixed, the output current with the load (LED number) increase or decrease. According to the power input and output circuit in the form can also be divided into isolation driven and non-isolated driver, the former represented by the switching power supply, while the latter mainly including capacitor step-down and led lights for homes current / constant voltage IC its performance, power