LED Flyback booster circuit LED backlight driving circuit and liquid crystal display

摘要

The flyback type step-up circuit includes a transformer, a switch module, a drive module, and an output diode, wherein the duty ratio of the switch module is D, and the transformer has n (n Wherein the switch module includes n switch elements, and the same name of the n primary coils corresponds to one-to-one correspondence with the n switch elements And the other ends of the n primary coils are connected to an input voltage, respectively, and the turns ratio of the secondary coil and each primary coil is K; The driving module sends control signals to the n switch elements to control the n switch elements to sequentially turn ON one of the n switch elements within a time period of a duty ratio D, An output capacitor is connected between the cathode of the output diode and the ground, and the cathode of the output diode is connected to the load of the load Lt; / RTI The present invention also provides a liquid crystal display device including the LED backlight driving circuit and the backlight driving circuit including the flyback type booster circuit.