System and method for wireless power transfer using automatic power supply selection
First Claim
1. An electronic system comprising:
- an electronics module;
a primary power supply that receives power from a primary external power source and supplies the received power to the electronics module when operative;
a secondary power supply that receives power from a secondary external power source and supplies the received power to the electronics module when operative; and
a selection module having first and second input rails coupled to the primary and secondary power supplies, respectively, an output rail coupled to the electronics module, a first switch coupled between the first input rail and the output rail, and a second switch coupled between the second input rail and the output rail;
wherein;
when the primary power supply is operative, the selection module selects the primary power supply to supply power to the electronics module and disables the secondary power supply, wherein the first switch is closed and the second switch is open;
when the primary power supply is not operative and the secondary power supply is operative, the selection module selects the secondary power supply to supply power to the electronics module, wherein the first switch is open and the second switch is closed; and
when the secondary power supply is disabled, the secondary power supply disables the secondary external power source;
and wherein when the first or second switch is open, reverse leakage current is blocked from flowing from the output rail towards the input rail corresponding to the open switch.
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Accused Products
Abstract
A system and method of wireless power transfer using automatic power supply selection includes an electronic system. The electronic system includes an electronics module, a primary power supply that receives power from a primary external power source, a secondary power supply that receives power from a secondary external power source, and a selection module. When the primary power supply is operative, the selection module selects the primary power supply to supply power to the electronics module and disables the secondary power supply. When the primary power supply is not operative and the secondary power supply is operative, the selection module selects the secondary power supply to supply power to the electronics module. When the secondary power supply is disabled, the secondary power supply disables the secondary external power source.
6 Citations
10 Claims
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1. An electronic system comprising:
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an electronics module; a primary power supply that receives power from a primary external power source and supplies the received power to the electronics module when operative; a secondary power supply that receives power from a secondary external power source and supplies the received power to the electronics module when operative; and a selection module having first and second input rails coupled to the primary and secondary power supplies, respectively, an output rail coupled to the electronics module, a first switch coupled between the first input rail and the output rail, and a second switch coupled between the second input rail and the output rail;
wherein;when the primary power supply is operative, the selection module selects the primary power supply to supply power to the electronics module and disables the secondary power supply, wherein the first switch is closed and the second switch is open; when the primary power supply is not operative and the secondary power supply is operative, the selection module selects the secondary power supply to supply power to the electronics module, wherein the first switch is open and the second switch is closed; and when the secondary power supply is disabled, the secondary power supply disables the secondary external power source; and wherein when the first or second switch is open, reverse leakage current is blocked from flowing from the output rail towards the input rail corresponding to the open switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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conducting power from a wireless power receiver to a system power supply rail through a closed first switch; detecting a turn-on of a wired power receiver; after detecting the turn-on of the wired power receiver; opening the first switch; disabling the wireless power receiver, wherein disabling the wireless power receiver includes disabling a wireless power transmitter engaged with the wireless power receiver; closing a second switch; and conducting power from the wired power supply to the system power supply rail through the closed second switch; wherein when the first switch is open, reverse leakage current is blocked from flowing from the system power supply rail towards the power supply corresponding to the first switch; and when the second switch is open, reverse leakage current is blocked from flowing from the system power supply rail towards the power supply corresponding to the second switch. - View Dependent Claims (10)
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Specification