Power supply including a detection and switch system for uni-plane and split-plane devices
First Claim
1. A detection and switch system for a power supply which provides power to a device, the power supply including two voltage supplies and corresponding outputs for providing one output voltage in a uni-plane mode if the device is a uni-plane device and for providing two separate output voltages in a split-plane mode if the device is a split-plane device, said detection and switch system comprising:
- a switch circuit for coupling to the two voltage supplies and receiving a select signal for selecting between uni-plane and split-plane modes; and
a detection circuit for monitoring at least one of the outputs of the two voltage supplies and for providing said select signal to said switching circuit for selecting the appropriate mode based on the voltage level of at least one of the output voltages.
7 Assignments
0 Petitions
Accused Products
Abstract
A power supply including a detection and switch system for sensing either a uni-plane or a split-plane device connected to a socket and for providing one or two supply voltages, respectively. In one embodiment, a dual output regulator includes first and second regulators with corresponding first and second feedback circuits and comparators for regulating first and second outputs, respectively. A switch circuit connects the second feedback circuit to the comparator of the second regulator in split-plane mode for providing the second output. However, the switch circuit connects the first feedback circuit to the comparator of the second regulator in uni-plane mode where the two outputs are coupled together by a uni-plane device, so that the two outputs are regulated at the same level. A detection circuit monitors the output signals and controls the switch circuit depending upon whether a uni-plane or split-plane device is detected. The detection circuit includes a comparator which compares the output voltages, which are the same if connected to a uni-plane device or separated by a predetermined amount if connected to a split-plane device. In one regulator embodiment, the outputs are compared after reaching regulation and in a second regulator embodiment, one regulator is momentarily disabled for making the comparison while either one or both outputs voltages are increasing. In another embodiment, two separate power supplies are included for providing separate voltage levels if a split-plane device is connected, where the second power supply is disconnected if a uni-plane device is connected.
17 Citations
30 Claims
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1. A detection and switch system for a power supply which provides power to a device, the power supply including two voltage supplies and corresponding outputs for providing one output voltage in a uni-plane mode if the device is a uni-plane device and for providing two separate output voltages in a split-plane mode if the device is a split-plane device, said detection and switch system comprising:
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a switch circuit for coupling to the two voltage supplies and receiving a select signal for selecting between uni-plane and split-plane modes; and a detection circuit for monitoring at least one of the outputs of the two voltage supplies and for providing said select signal to said switching circuit for selecting the appropriate mode based on the voltage level of at least one of the output voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A dual output power supply for providing source voltage to either a uni-plane or a split-plane device, comprising:
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a first voltage regulator including a first feedback circuit for regulating a first output voltage; a second voltage regulator including a second feedback circuit for regulating a second output voltage according to a split-plane mode; and a switch circuit for disconnecting said second feedback circuit from, while coupling said first feedback circuit to, said second voltage regulator according to a uni-plane mode wherein said first and second output voltages are regulated at the same voltage level. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A system for providing source voltage to a device which is either a uni-plane device or a split-plane device, comprising:
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a first power supply providing a first output voltage to the device; a second power supply providing a second output voltage to the device; a switch circuit for coupling said second power supply to the device if split-plane and for disconnecting said second power supply if uni-plane; and a comparator circuit coupled to said first power supply and said switch circuit for controlling said switch circuit based on the voltage level of the device. - View Dependent Claims (29, 30)
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Specification