| 摘要 |
The invention is a power converter having a transformer (T) with a primary side winding (T1A) and a secondary side winding (T1C). Both the primary side and the secondary side have switches (Q1 & Q101) which are switched on a nd off alternately. When the primary master switch (Q1) is switched on, the transformer (T) charges. When the primary master switch (Q1) is switched off , the intrinsic capacitance of the secondary slave switch (Q101) discharges generating the zero voltage switching condition for the secondary slave swit ch (Q101). The secondary slave switch (Q101) is switched on at a time determine d in accordance with the waveform generated by the transformer (T). When the secondary slave switch (Q101) is switched on, the transformer (T) discharges and ultimately the charge from an output capacitor (C101) flows into the transformer (T) as a backflow which charges the transformer (T). The seconda ry slave switch (Q101) is switched off at a time determined in accordance with a current flowing through said secondary switch (Q101). The intrinsic capacitance of primary master switch (Q1) discharges generating the zero voltage switching condition primary master switch (Q1) is then switched on a nd the cycle repeats.
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