LED driving circuit with the temperature compensation
A technology of light-emitting diodes and driving circuits, which is applied in the directions of electroluminescent light sources, electric lamp circuit arrangements, light sources, etc., and can solve the problems of changes in the chromaticity and brightness of light-emitting diodes
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[0079] image 3 and Figure 4 It is a plurality of embodiments of an LED driving circuit according to the present invention, wherein the LEDs 20-25 are connected in series. A voltage source V IN It is to supply the light-emitting diodes 20-25. A control circuit 100 is coupled to the LEDs 20-25. image 3 It is shown that the power supply of the control circuit 100 is provided by a voltage source VCC. Figure 4 It is shown that the power supply of the control circuit 100 is provided directly by the voltage source VIN. An output terminal OUT of the control circuit 100 generates a LED current for controlling the LEDs 20 - 25 . A first resistor 57 is connected to the control circuit 100 for determining the current value of the LED current. A control terminal IN of the control circuit 100 is used to receive a control signal V CNT , to turn on / off the LED current, and determine the duty cycle of the LED current. A detection terminal VS of the control circuit 100 is connected to...
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