Synchronous rectification driving circuit of flyback converter
A flyback converter and synchronous rectification technology, applied in the direction of DC power input conversion to DC power output, instruments, electrical components, etc., can solve problems affecting circuit efficiency or reliability, and achieve simple application, reliable shutdown, and circuit simple effect
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[0019] figure 2 This is a circuit schematic diagram of a flyback converter applying the best specific embodiment of the synchronous rectification drive circuit of the present invention. The flyback converter includes an input part, a converter part, an output part, a drive circuit and a PWM chip U1. The input part, the converter part and the output part belong to the prior art, and the driving circuit is the object to be protected by the present invention. The drive circuit can be applied to all flyback converters using synchronous rectification.
[0020] The input part includes a filter capacitor C1; the converter part includes a power transformer T1, a switch tube Q1 and a synchronous rectifier tube Q2; the output part includes an output capacitor CL; one end of the filter capacitor C1 is grounded, and the other end is connected to the primary winding of the power transformer T1 The same name terminal 1 of the power transformer T1 is connected to the same name terminal 1 ...
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