Universal power converter with single, shared power transformation circuit
First Claim
1. A power converter for converting an input voltage signal to a DC output voltage signal for driving a DC load, said power converter comprising:
- a first set of input terminals for receiving an AC input voltage signal;
a second set of input terminals for receiving a DC input voltage signal;
a single, shared power transformation circuit directly connected to said first set and said second set of input terminals, said power transformation circuit comprising;
a first voltage stage coupled to said first set of input terminals;
a second voltage stage coupled to said second set of input terminals; and
a third voltage stage coupled to said first and second voltage stages for convening said input voltage signal to said DC output voltage signal, said third voltage stage further including a set of output terminals connected to said DC load; and
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a controller driver connected between said first and second set so input terminals and said first and second voltage stages for during a selected one of said first and second voltage stages.
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Accused Products
Abstract
A power conversion method and apparatus convert an AC input voltage signal or a DC input voltage signal to a DC output voltage signal suitable for driving a DC load. The power converter includes a first voltage stage coupled to a first pair of input terminals to receive a rectified AC input voltage signal. A second voltage stage is coupled to a second pair of input terminals to receive a DC input voltage signal from a battery source. A transistor drive circuit is connected between the input terminals and the first and second voltage stages. The drive circuit causes energy to be stored in either the first or second voltage stage depending upon whether an AC or a DC voltage signal is applied to the input terminals. The stored energy is released to a third voltage stage to produce a DC output voltage at output terminals coupled to a power supply of a portable device, such as a personal computer.
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Citations
30 Claims
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1. A power converter for converting an input voltage signal to a DC output voltage signal for driving a DC load, said power converter comprising:
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a first set of input terminals for receiving an AC input voltage signal; a second set of input terminals for receiving a DC input voltage signal; a single, shared power transformation circuit directly connected to said first set and said second set of input terminals, said power transformation circuit comprising; a first voltage stage coupled to said first set of input terminals; a second voltage stage coupled to said second set of input terminals; and a third voltage stage coupled to said first and second voltage stages for convening said input voltage signal to said DC output voltage signal, said third voltage stage further including a set of output terminals connected to said DC load; and
;a controller driver connected between said first and second set so input terminals and said first and second voltage stages for during a selected one of said first and second voltage stages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A power converter for converting an input voltage signal to a DC output voltage signal for driving a DC load, said power converter comprising:
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a first set of input terminals for receiving art AC input voltage signal; a second set of input terminals for receiving a DC input voltage signal; a single, shared transformer comprising a first primary winding directly connected to said first set of input terminals, a second primary winding directly connected to said second set of input terminals, and a secondary winding connected to a set of output terminals, wherein said set of output terminals is further connected to said DC load; and a transistor drive circuit connected between said first and second sets of input terminals and said primary windings of said transformer for driving a selected one of said primary windings to convert said input voltage signal to said DC output voltage signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification