Power supply device having two AC power inputs
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United States of America Patent
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-
Mar 18, 2003
Grant Date -
Oct 10, 2002
app pub date -
May 15, 2001
filing date -
Apr 4, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power supply device having two AC power inputs includes a power unit that has first and second AC power inputs and a power output, a step-down and filter unit, a power regulator unit, and a detecting and switching unit. The step-down and filter unit converts the AC from the power unit to a low-voltage DC power. The power regulator unit maintains the low-voltage DC power as a stable power. The detecting and switching unit detects whether a power failure occurs on the first AC power input and subsequently switches the power supply to the second AC power input to keep a stable power supply so as to avoid any damage caused from the failure of the power supply.
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