| 摘要 |
An SMPS(Switching Mode Power Supply) multi-output feedback power source is provided to decrease a power consumption at a load by stabilizing an output voltage of an output stage. An SMPS multi-output feedback power source includes an AC power input unit(10), a main switch IC block(11), a main transformer(12), a first rectifier block(13), a first output stage(14), a second rectifier block(15), a second output stage(16), and a feedback unit(17). A thermistor is implemented between the main transformer and the second rectifier block. A resistance of the thermistor is changed in an opposite direction with respect to a current. During an operation mode, the resistance of the thermistor is decreased to be close to zero. During a standby mode, the resistance of the thermistor is increased, so that an output voltage is stabilized.
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