| 摘要 |
A power supply having a mixed regulator is able to provide the suitable power source according to the changing load by a switching mode voltage circuit and a series pass controlling circuit. The series pass controlling circuit has high sensitivity in detecting the changing the load, thus the power supply offers the suitable power source according to the changing of the load. The switching mode voltage circuit controls the transformer to output voltage by a PWM IC, so that the transistors for driving the transformer need not be powerful transistors which generate excessive heat. Thus a heat sink is not necessary and the power supply can accordingly be of a compact size.
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