An Isolated Input Zero Ripple Switching Converter
A switching converter and isolation technology, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., can solve the problems of unfavorable integration and many components, and achieve reduced ripple and high The effect of integration
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no. 1 example
[0025] figure 1 It is the schematic circuit diagram of the first embodiment of the present invention, an isolated input zero-ripple switching converter, including input voltage source Vin, transformer W1, transformer W2, inductors L1~L3, switch tubes Q1~Q4, capacitor Cr, capacitor Co and load resistor R1; the connection relationship is:
[0026] The positive end of the input voltage Vin is electrically connected to the same-named end of the primary winding P1 of the transformer W1, the opposite-named end of the transformer W1 winding is electrically connected to the drain of the switching tube Q1 and the drain of the switching tube Q2, and the source of the switching tube Q2 It is electrically connected to the negative terminal of the capacitor Cr and the terminal of the same name of the secondary winding S1 of the transformer W2, the positive terminal of the capacitor Cr is electrically connected to the drain of the switching tube Q4, the source of the switching tube Q1, the ...
no. 2 example
[0039] figure 2 It is the principle diagram of the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the positive end of the input voltage Vin is electrically connected to the end of the same name of the primary winding P1 of the transformer W1, and the primary winding of the transformer W1 The opposite terminal of P1 is electrically connected to the drain of the switching tube Q1 and the drain of the switching tube Q2, the source of the switching tube Q2 is electrically connected to the same terminal of the secondary winding S1 of the transformer W2, and the source of the switching tube Q1 and The opposite end of the secondary winding S1 of the transformer W2 is electrically connected to the negative end of the input voltage Vin; the same end of the secondary winding S2 of the transformer W2 is electrically connected to the negative end of the capacitor Cr and the positive end of the capacitor Co, and the capac...
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