Load voltage compensation circuit for light-emitting diode (LED) driving
A technology of LED drive and load voltage, applied in the field of compensation circuit, can solve the problems of increasing circuit cost and achieve the effects of high output current accuracy, simplified application circuit, and simplified peripheral circuit
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[0019] The working principle of the present invention will be further described in detail below with reference to the drawings and preferred solutions.
[0020] As attached Figure 4 Shown is the circuit block diagram of the present invention, specifically a block diagram of a load voltage compensation circuit for LED driving. The circuit includes a transformer, a current detection module, a demagnetization detection module, a control drive module, a switch tube (Q6), Sampling resistor (RC6), voltage divider resistors (RA6, RB6), load voltage detection module, sample and hold module and load voltage compensation module. The transformer only includes the main winding (Lp), the load voltage detection module, the sample and hold module, and the load voltage compensation module are connected in series in sequence; the output end of the load voltage compensation module is connected to the control drive module; A feedback detection terminal (FB) is also led out. After the feedback dete...
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