| 摘要 |
An exemplary multi-output switching power supply ( 2 ) includes a switching power supply controller ( 21 ) for generating a pulse signal; a transformer device ( 20 ) for providing a first and a second AC voltages according to the pulse signal; a first half wave rectifier ( 23 ) and a first filter circuit ( 25 ) connected in series for transforming the first AC voltage to a first DC voltage; a second half wave rectifier ( 24 ) and a second filter circuit ( 26 ) connected in series for transforming the second AC voltage to a second DC voltage; a first output ( 27 ) for providing the first DC voltage to a first load circuit ( 210 ); a feedback circuit configured for generating a feedback signal according to the first DC voltage and the second DC voltage, and providing the feedback signal to the switching power supply controller; and a voltage limiting circuit ( 29 ) connected between the first output and ground.
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