Output current compensation circuit of LED driving circuit
A technology of LED driving and output current, applied in the direction of electric lamp circuit layout, electric light source, adjusting electric variables, etc., can solve the problems of affecting the life of LED load, affecting the stability of light emission, poor current stability characteristics of LED driving circuit, etc. Effects of Flow Properties
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[0055] The content of the present invention will be further described below in conjunction with the accompanying drawings.
[0056] as attached figure 1 When the LED driving circuit (partial circuit structure) shown is driving the LED load, the LED driving circuit is connected with an external LED circuit to form an LED driving circuit system. The system structure is as follows figure 2 As shown: the external LED circuit includes a serial connection of sampling resistor Rsense, LED load, inductor and Schottky diode D1; the sampling resistor Rsense is connected across the Vin port and CS port of the LED drive circuit; the LED The positive pole of the load is connected to the CS port of the LED driving circuit, the negative pole is connected to one end of the inductor, and the other end of the inductor is connected to the SW port of the LED driving circuit; the Schottky diode D1 is connected across the Vin port of the LED driving circuit With the SW port, its PN junction is fo...
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