POWER SUPPLY AND SYSTEM
First Claim
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1. A power supply comprising:
- a switch, coupled to an AC voltage source;
a voltage detector, detecting a voltage level of the AC voltage source; and
a switching power supply stage, coupled to the switch, to output a DC voltage,wherein when the voltage level is larger than a predetermined voltage level, the switch is turned off to isolate the switching power supply stage from the AC voltage source.
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Abstract
The invention provides a power supply comprising a switch, a voltage detector and an SPS stage. The switch is coupled to an AC source. The voltage detector detects a voltage of the AC source. The SPS stage is coupled to the switch and outputs a DC voltage. When the voltage of the AC source is larger than a predetermined voltage, the switch is turned off to isolate the AC source from the SPS stage.
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Citations
16 Claims
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1. A power supply comprising:
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a switch, coupled to an AC voltage source; a voltage detector, detecting a voltage level of the AC voltage source; and a switching power supply stage, coupled to the switch, to output a DC voltage, wherein when the voltage level is larger than a predetermined voltage level, the switch is turned off to isolate the switching power supply stage from the AC voltage source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power supply system, coupled to an AC voltage source to output a DC voltage, comprising:
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a switch, coupled to the AC voltage source; a voltage detector, detecting a voltage level of the AC voltage source; and a switching power supply stage, coupled to the switch to transform a received AC voltage into the DC voltage, wherein when the voltage level is larger than a predetermined voltage level, the switch is turned off to isolate the switching power supply stage from the AC voltage source. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification