| 摘要 |
A charge pump circuit of a switching source includes: a transformer; a rectifier diode of a secondary side of the transformer located at a ground side of a secondary winding wire; a capacitor for a charge pump; a power source of which a voltage is applied so as to charge accumulated in the capacitor; and a boosting transistor connected between the capacitor and the power source. A transformer voltage generated at a cathode side of the rectifier diode is at least partially used as a gate-driving voltage of the boosting transistor.
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