Over-voltage protection arrangement for a low voltage power supply
First Claim
1. An electrical power supply, comprising:
- a power input interconnected with a power source that supplies input power having a voltage exceeding a predetermined voltage threshold;
a power conversion arrangement interconnected with the power input for converting input power to output power having a voltage at or below the predetermined voltage threshold;
a power outlet for receiving output power from the power conversion arrangement; and
an over-voltage protection arrangement for detecting the voltage of the output power from the power supply, wherein the over-voltage protection arrangement is operable to discontinue the supply of power to the power outlet in response to the output power having a voltage exceeding the predetermined voltage threshold..
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Abstract
An electrical power supply includes a power input interconnected with a power source that supplies input power having a voltage exceeding a predetermined voltage threshold, e.g. a low voltage threshold. A power conversion arrangement converts the input power to output power having a voltage at or below the voltage threshold, and the low voltage power is supplied to a power outlet. An over-voltage protection arrangement, in the form of a voltage sensing circuit, is operable to detect the voltage of output power from the power supply and to discontinue the supply of power to the power outlet in the event power supplied to the power outlet has a voltage that exceeds the low voltage threshold. The over-voltage protection circuit is incorporated in a circuit board adapted to be plugged into a primary circuit board of the power supply. The over-voltage protection circuit establishes a path through which power is communicated from the power conversion arrangement to the power outlet, and creates a short circuit condition when power supplied to the power outlet exceeds the low voltage threshold.
32 Citations
19 Claims
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1. An electrical power supply, comprising:
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a power input interconnected with a power source that supplies input power having a voltage exceeding a predetermined voltage threshold;
a power conversion arrangement interconnected with the power input for converting input power to output power having a voltage at or below the predetermined voltage threshold;
a power outlet for receiving output power from the power conversion arrangement; and
an over-voltage protection arrangement for detecting the voltage of the output power from the power supply, wherein the over-voltage protection arrangement is operable to discontinue the supply of power to the power outlet in response to the output power having a voltage exceeding the predetermined voltage threshold.. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. In an electrical power supply that receives input power from a power source having a voltage exceeding a low voltage threshold and having a low voltage power output for outputting power having a voltage at or below the low voltage threshold, the improvement comprising an over-voltage protection arrangement configured to discontinue the output of power to the power output in the event power supplied to the power output exceeds the low voltage threshold.
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13. A method of protecting the output of a low voltage power supply having a power input for receiving power from a power source having a voltage exceeding a voltage threshold and having a power output for outputting power having a voltage at or below the voltage threshold, comprising the steps of:
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sensing the voltage of power supplied to the power output; and
discontinuing the supply of power to the power output in response to the power supplied to the power output having a voltage exceeding the voltage threshold. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification