System and method for protecting low voltage transceiver
First Claim
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1. A method comprising:
- detecting a first voltage at a connector wherein at least a transceiver module portion of an integrated circuit is operable to be powered through the connector;
electrically decoupling the transceiver module from the connector in response to the first detected voltage having a value greater than a first voltage value, the transceiver module to send and receive information external the integrated circuit; and
powering the transceiver module through the connector prior to electrically decoupling the transceiver and powering the transceiver through a different connector coupled to a battery in response to the first voltage having a value greater than the first voltage value.
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Abstract
A transceiver module can share a common connector with a rechargeable battery connection. The transceiver module can be protected from the high voltages applied by a battery charger. Determining when the voltage applied at a connector exceeds a reference voltage and electrically decoupling the transceiver module from the connector when the reference voltage is exceeded can protect the transceiver module. The reference voltage can be set at a level so that the transceiver is decoupled from the connector when the voltage at the connector reaches a voltage that is unsafe for the transceiver.
22 Citations
19 Claims
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1. A method comprising:
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detecting a first voltage at a connector wherein at least a transceiver module portion of an integrated circuit is operable to be powered through the connector; electrically decoupling the transceiver module from the connector in response to the first detected voltage having a value greater than a first voltage value, the transceiver module to send and receive information external the integrated circuit; and powering the transceiver module through the connector prior to electrically decoupling the transceiver and powering the transceiver through a different connector coupled to a battery in response to the first voltage having a value greater than the first voltage value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system, comprising:
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a connector; an integrated circuit, comprising, a transceiver module comprising an input to provide a supply voltage to at least a portion of the transceiver module; a first comparator comprising an input coupled to the connector and an output to indicate when a voltage at the connector is greater than a first voltage; and a control module comprising a first input coupled to the output of the first comparator, a second input coupled to the connector, a third input coupled to the output of a second comparator and an output coupled to the transceiver module wherein the output is electrically decoupled from the second input in response to the first comparator indicating the voltage at the connector is greater than the first voltage, and the output is electrically coupled to the connector in response to the first comparator indicating the voltage at the connector is less than the first voltage and the output is electrically decoupled from the connector in response to the second comparator indicating the voltage at the connector is less than the second voltage, wherein the second voltage is less than the first voltage. - View Dependent Claims (15, 16, 17)
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18. A system, comprising:
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a connector; an integrated circuit, comprising, a transceiver module comprising an input to receive a supply voltage to power at least a portion of the transceiver module; a first comparator comprising an input coupled to the connector and an output to indicate when a voltage at the connector is greater than a first voltage; and a control module comprising a first input coupled to the output of the first comparator, a second input coupled to the connector, and an output coupled to the transceiver module wherein the output is electrically decoupled from the second input in response to the first comparator indicating the voltage at the connector is greater than the first voltage, and the output is electrically coupled to the connector in response to the first comparator indicating the voltage at the connector is less than the first voltage; wherein the transceiver module is capable of communicating with universal serial bus (USB) systems, and the control module further comprises a third input coupled to the transceiver module to receive an indication when a USB OTG session has been initiated wherein the output is electrically coupled to the second input in response to receiving at the third input the indication that a USB on-the-go (OTG) session has been initiated.
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19. A method comprising:
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detecting a first voltage at a connector wherein at least a transceiver module portion of an integrated circuit is operable to be powered through the connector, wherein the transceiver module is capable of communicating with universal serial bus (USB) systems and the connector comprises a USB VBUS connection; electrically decoupling the transceiver module from the connector in response to the first detected voltage having a value greater than a first voltage value, the transceiver module to send and receive information external the integrated circuit; and electrically coupling the transceiver module to the connector in response to a USB on-the-go (OTG) session being initiated.
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Specification