Constant power LED driver
A technology of LED driver and constant power, applied in the field of LED linear constant current driver, can solve the problems of LED efficiency decrease, input power increase, driver efficiency decrease, etc., and achieve the effect of good LED drive efficiency
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[0034] In order to further understand the structure, features and purpose of the present invention, it will be described in detail in conjunction with the accompanying drawings and preferred specific embodiments.
[0035] Please refer to figure 2 , which shows a circuit diagram of an embodiment of the constant power LED driver of the present invention. As shown in Figure 2, an LED lighting device includes a rectifier module 100, a filter capacitor 110, an LED string 120, a filter capacitor 130 and a constant power LED driver 140, and the constant power LED driver 140 includes a voltage-to-current module 150 And an adjustable constant current module 160 .
[0036] exist figure 2 In the circuit, the constant power LED driver 140 has a voltage input terminal IN to couple with the cathode of the LED string 120, the anode of the LED string 120 is used to couple with a DC voltage VIN, the rectifier module 100 and the filter capacitor 110 In parallel, the LED string 120 is conne...
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