LED (light-emitting diode) drive control circuit
A technology of LED driving and current sampling, applied in energy-saving control technology, lamp circuit layout, electric light source, etc., can solve the problem of damaging LED loads and power tubes, and achieve the effect of avoiding burnout
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[0038] The content of the present invention will be described in detail below in conjunction with the block diagram of the present invention and the schematic diagrams of specific embodiments.
[0039] Such as Figure 4 As shown, the LED drive control circuit 21 includes:
[0040] LED load sampling port FB, switch port SW, comparison port COMP;
[0041] Error amplification module 22: the error amplification module 22 inputs the LED load sampling voltage through the LED load sampling port, and compares and amplifies the LED load sampling voltage with the reference voltage;
[0042] Current sampling module 210: the current sampling module 210 samples the current flowing through the power tube in the switch module 211, and the output current sampling signal is provided to the comparison module 23 and the current limiting module 27;
[0043] A comparison module 23, the comparison module 23 compares the voltage of the comparison port COMP with the current sampling signal output b...
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