Switching type power convertor and its synchronous rectifier control method
A technology of synchronous rectifiers and power converters, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve problems such as high cost, large volume, and large loss
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[0043] In order to clearly illustrate the detailed technical features of the prior art and the improved technology proposed by the present invention, the current and voltage changes after the primary-side synchronous rectifier is turned off are firstly analyzed here. Figure 10 is the detailed main waveform timing diagram, figure 2 is the main power asymmetrical half-bridge circuit topology corresponding to the waveform timing diagram.
[0044] see figure 2 , which is a topological structure diagram of an asymmetric control half-bridge circuit. Among them, the switching power converter has an input voltage source V in , a first switching device Q 1 and a second switching device Q 2 , a transformer T, and a first synchronous rectifier S 2 and a second synchronous rectifier S 1 A rectifier circuit. The first switching device Q 1 connected to the input voltage source V in the high voltage side, the second switching device Q 2 connected to the input voltage source V i...
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