A High Efficiency and Low Cost Forward and Flyback DC-DC Converter Topology
A technology of DC-DC and converter, applied in the field of switching power supply
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[0027] The following describes preferred embodiments according to the present invention with reference to the accompanying drawings. In the accompanying drawings, similar reference numerals represent similar elements, so they will not be described in detail again. "U" and "V" are symbols representing voltage , are used indiscriminately below.
[0028] image 3 shows an equivalent circuit diagram of an active-clamp forward-flyback DC-DC converter topology according to an embodiment of the present invention, in image 3 Among them, Lr and Lm represent the leakage inductance and excitation inductance separated from the actual transformer equivalent model, respectively, and the transformer is an ideal transformer. Depend on image 3 It can be seen that the topology of the DC-DC converter according to this embodiment includes a high frequency transformer, a main switch T1, an active clamp circuit, rectifier diodes D1 and D2, a resonant circuit and an output capacitor C0.
[0029...
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