A constant voltage led drive circuit
A LED drive and circuit technology, applied in the direction of electric light source, electrical components, electroluminescent light source, etc., can solve the problems of LED aging, shortened service life, forward current reduction, etc., achieve low cost, improve conduction speed, voltage stable effect
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[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.
[0012] see figure 1 , in an embodiment of the present invention, a constant voltage LED drive circuit includes a diode D1, a diode D2, a capacitor C1, an inductor L1, a resistor R1, and a triode BG1. The emitter of the triode BG1 is respectively connected to the power supply VCC and the inductor L2. The triode BG1 The bases are respectively connected to the resistor R1 and the positive pole of the diode D2, the negative pole of the diode D2 is respectively connected to the negative pole of the diode D1, the capacitor C2 and the positive pole of the light-emitting diode LED, the positive pole of the diode D1 is respectively connected to the other end of the inductor L2 and the collector of the triode BG2, and the emitter of the triode BG2 is respectively connected to the capacit...
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