LED constant current drive circuit and LED light fixture
A constant current drive and circuit technology, applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., can solve the problems of low efficiency, large loss, and increase the complexity of the circuit, so as to achieve a simple circuit structure, improve overall efficiency, and reduce energy. The effect of loss
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[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0020] See figure 1 , Is a schematic diagram of the structure of the LED constant current drive circuit provided by the present invention, including LED 110, switch circuit 120, current sampling circuit 130, auxiliary power supply circuit 140 and PWM control chip 150, auxiliary power supply circuit 140 includes auxiliary power supply inductor 141, auxiliary power supply Diode 142 and auxiliary power supply capacitor 143. The LED 110, the...
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