Battery charger reverse-boosting detection
AssigneeQUALCOMM Incorporated
InventorsRicardo T. Goncalves, Jennifer A. Hagstrom
Life of this patent
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Abstract
Exemplary embodiments are related to detecting a reverse-boosting operation of a battery charger. A device may include a plurality of switches for receiving an input voltage at an input port and conveying an output voltage. The device may also include a first sensing device coupled to the input port configured to detect if an input current is less than a threshold current. Further, the device may include a second sensing device selectively coupled to the input port to detect if the input voltage is less than a threshold voltage.
Claims22
A device, comprising:
- a plurality of switches for receiving an input voltage at an input port and conveying an output voltage;
- a first sensing device coupled to the input port configured to detect if an input current is less than a threshold current;
- and
- a second sensing device selectively coupled to the input port to detect if the input voltage is less than a threshold voltage.
A device, comprising:
- a battery charger, comprising;
- an input port for coupling to a power source;
- a plurality of switches for receiving coupled to the input port;
- a first sensing device coupled to the input port and configured to convey a first signal indicative of a comparison of a current through the input port and a threshold current;
- and
- a second sensing device selectively coupled to the input port and configured to convey a second signal indicative of a comparison of a voltage at the input port and a threshold voltage;
- and
- a control module configured to receive the first signal and the second signal, the control module further configured to convey a control signal for disabling the battery charger in response to the voltage at the input port being less than the threshold voltage and the current through the input port being less than the threshold current.
A method, comprising:
- comparing an input current level of a battery charger to a threshold current;
- comparing an input voltage level of the battery charger to a threshold voltage;
- and
- disabling the battery charger if the input current level is less than the threshold current and the input voltage level is less than the threshold voltage.
A method, comprising:
- determining if an input current and an input voltage of a charger are less than respective threshold values;
- determining if a transistor selectively coupling an output node of the charger to a battery is in a conductive state;
- and
- disabling the charger if the input current and an input voltage are less than the respective threshold values and the transistor is in the conductive state.
A device, comprising:
- means for comparing an input current level of a battery charger to a threshold current;
- means for comparing an input voltage level of the battery charger to a threshold voltage;
- and
- means for disabling the battery charger if the input current level is less than the threshold current and the input voltage level is less than the threshold voltage.
A device, comprising:
- means for determining if an input current and an input voltage of a charger are less than respective threshold values;
- and
- means for determining if a transistor selectively coupling an output node of the charger to a battery is in a conductive state;
- and
- means for disabling the charger if the input current and an input voltage are less than the respective threshold values and the transistor is in the conductive state.
Dependencies are inferred from the claim text.