Charge storage and power routing for dongles and adapters
First Claim
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1. A dongle comprising:
- a first plug to couple to a host device receptacle on a host device;
a housing coupled to the first plug;
a first receptacle in the housing to receive a second plug coupled to a charger;
a second receptacle in the housing to receive a third plug coupled to an accessory;
a first regulator having an output coupled to a power supply terminal in the second receptacle;
a first switch having a first terminal coupled to a power supply terminal in the first plug and a power supply terminal in the first receptacle and a second terminal coupled to an input of the first regulator;
a charge storage circuit having an input coupled to the output of the first regulator; and
a second switch having a first terminal coupled to an output of the charge storage circuit and a second terminal coupled to the second terminal of the first switch and the first regulator.
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Accused Products
Abstract
Circuits, methods, and apparatus where a dongle or adapter may provide continuous power in the event of a disconnection of a charging device. One example may provide a dongle having a charge storage circuit. A charging device connected to the dongle may be used to power an accessory also connected to the dongle. Following a disconnection of the charging device, the dongle may use the charger storage circuit to provide power to the accessory for a first duration. After the first duration, a host device also connected to the dongle may provide power to the accessory via the dongle.
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Citations
20 Claims
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1. A dongle comprising:
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a first plug to couple to a host device receptacle on a host device; a housing coupled to the first plug; a first receptacle in the housing to receive a second plug coupled to a charger; a second receptacle in the housing to receive a third plug coupled to an accessory; a first regulator having an output coupled to a power supply terminal in the second receptacle; a first switch having a first terminal coupled to a power supply terminal in the first plug and a power supply terminal in the first receptacle and a second terminal coupled to an input of the first regulator; a charge storage circuit having an input coupled to the output of the first regulator; and a second switch having a first terminal coupled to an output of the charge storage circuit and a second terminal coupled to the second terminal of the first switch and the first regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of providing power to an accessory using a dongle, the method comprising, with the dongle:
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receiving power at a first receptacle and using the power received at the first receptacle to provide power to a first plug and a second receptacle, and to charge a charge storage circuit in the dongle; detecting that the power received at the first receptacle is no longer being received;
thenproviding a signal to the first plug that power is not being received at the first receptacle; providing power to the second receptacle using the charge storage circuit;
then, after a first duration; andreceiving power at the first plug and using the power received at the first plug to provide power to the second receptacle. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An electronic system comprising:
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a host device having a receptacle; and a dongle having a plug to mate with the receptacle on the host device, the plug connected to a housing of the dongle, the housing having a first receptacle to connect to a charger and a second receptacle to connect to an accessory, the dongle further comprising; a first switch to couple a power supply received at the first receptacle to the second receptacle; detect circuitry to detect that the power supply received at the first receptacle is no longer being received and to send a signal to the host device indicating that the power supply received at the first receptacle is no longer being received; and a second switch to couple a charge storage circuit to provide a power supply to the second receptacle, wherein the host device further comprises; logic to receive the signal from the dongle indicating that the power supply received at the first receptacle of the dongle is no longer being received and to provide a power supply to the plug of the dongle within a first duration, and wherein the first switch of the dongle couples the power supply received from the host device on the plug to the second receptacle. - View Dependent Claims (18, 19, 20)
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Specification