Light-emitting diode (LED) driving circuit and LED lamp
A technology of LED driving and LED light source, applied in the direction of electric light circuit layout, electric light source, lighting device, etc., can solve the problems of reduced LED working current, LED can not work at full load, and user inconvenience.
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[0019] Such as figure 1 , figure 2 As shown, an LED driving circuit provided in this embodiment is used to drive the LED light source 300 . The LED driving circuit includes a voltage regulation module 100 and a constant current module 200 . The output terminal of the voltage regulation module 100 provides an adjustable voltage signal for the constant current module 200 , and the constant current module 200 provides different constant currents for the LED light source 300 according to different voltage signals of the voltage regulation module 100 .
[0020] The voltage regulation module 100 can provide an adjustable voltage signal to the outside. The voltage regulation module 100 includes a Zener diode U2, a potentiometer R1 and a first voltage dividing resistor R2. The first voltage dividing resistor R2 is connected in series with the potentiometer R1, the other end of the potentiometer R1 is connected to the anode of the Zener diode U2 and grounded at the same time, the o...
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