Multiway LED constant current controller and control method
A current controller and constant current control technology, which is applied in the direction of lamp circuit layout, electrical components, electroluminescence light source, etc., can solve the load state change, the influence of constant current control accuracy and efficiency, and the loop response speed cannot adapt to the load state To improve the transient response speed and speed up the loop response speed
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[0046] Hereinafter, various embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the drawings are not drawn to scale.
[0047] reference figure 2 , Which shows a schematic circuit diagram of an LED constant current controller 100 adopting a hysteresis control method according to the prior art. The LED constant current controller 100 includes a hysteresis comparator 101 and a flip-flop 102. The non-inverting terminal of the hysteresis comparator 101 is connected to an external current sampling unit (such as a sampling resistor) to receive the current feedback signal VFB, and the inverting terminal receives the reference voltage Vref. The output terminal of the hysteresis comparator 101 is connected to the flip-flop 102. The output terminal of the flip-flop 102 is connect...
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