Apparatus and method for a switching power converter
First Claim
1. A power converter, comprising:
- a first terminal configured to receive an input voltage;
a charging converter coupled in a current path from the first terminal to a second terminal and including a first switch and configured to;
provide power from a power source to a rechargeable storage unit that is internal to the power converter during a charging mode; and
provide power from the rechargeable storage unit to an external electronic device that is externally connected to the power converter during an on-the-go mode;
a system power converter coupled in a current path from the second terminal to a third terminal, the system power converter including a second switch and configured to;
provide power to internal system components of the power converter from the rechargeable storage unit and an input power source; and
control logic coupled to the charging converter and the system power converter and configured to control the charging converter and the system power converter by;
determining whether a short exists;
distinguishing whether the short exists at the first terminal or the third terminal using a current sensor;
in response to detecting a short at the first terminal, causing the charging converter to open the first switch; and
in response to detecting a short at the third terminal, causing the system power converter to open the second switch.
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Accused Products
Abstract
A charging converter includes a plurality of switches configured to switchably operate to either step up an input voltage or step down the input voltage and generate a charging voltage on a second terminal to charge to a rechargeable storage unit, and control logic configured to operate the plurality of switches in one of a step up mode and a step down mode based on a determination of a voltage level of the input voltage relative to the desired charging voltage. A method includes determining a desired charging voltage to charge a rechargeable storage unit, switchably controlling a charging converter to step up the input voltage if an input voltage is lower than the desired charging voltage to generate a charging voltage, and switchably controlling the charging converter to step down the input voltage if the input voltage is higher than the desired charging voltage to generate the charging voltage.
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Citations
22 Claims
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1. A power converter, comprising:
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a first terminal configured to receive an input voltage; a charging converter coupled in a current path from the first terminal to a second terminal and including a first switch and configured to; provide power from a power source to a rechargeable storage unit that is internal to the power converter during a charging mode; and provide power from the rechargeable storage unit to an external electronic device that is externally connected to the power converter during an on-the-go mode; a system power converter coupled in a current path from the second terminal to a third terminal, the system power converter including a second switch and configured to; provide power to internal system components of the power converter from the rechargeable storage unit and an input power source; and control logic coupled to the charging converter and the system power converter and configured to control the charging converter and the system power converter by; determining whether a short exists; distinguishing whether the short exists at the first terminal or the third terminal using a current sensor; in response to detecting a short at the first terminal, causing the charging converter to open the first switch; and in response to detecting a short at the third terminal, causing the system power converter to open the second switch. - View Dependent Claims (2, 3, 4)
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5. An electronic device, comprising:
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first, second, and third terminals; a charging converter coupled in a current path from the first terminal to the second terminal, the charging converter including a first switch and configured to; provide power from a power source to a rechargeable storage unit that is internal to the electronic device during a charging mode; provide power from the rechargeable storage unit to an external electronic device that is externally connected to the electronic device during an on-the-go mode; and a system power converter coupled in a current path from the second terminal to the third terminal, the system power converter including a second switch and configured to; provide power to internal system components of the electronic device from at least one of the rechargeable storage unit and an input power source; and control logic coupled to the charging converter and the system power converter and configured to control the charging converter and the system power converter by; determining whether a short exists; distinguishing whether the short exists at the first terminal or the third terminal using a current sensor; in response to detecting a short at the first terminal, causing the charging converter to open the first switch; and in response to detecting a short at the third terminal, causing the system power converter to open the second switch. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for operating a rechargeable storage unit of an electronic device, the method comprising:
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charging a rechargeable storage unit housed within the electronic device through a charging converter responsive to receiving an input voltage provided by an external power source through a first terminal during a charging mode, the charging converter coupled in a current path from the first terminal to a second terminal and including a first switch; providing power, by the charging converter, from the rechargeable storage unit to an external electronic device that is externally connected to the electronic device during an on-the-go mode; providing power, by a system power converter coupled in a current path from the second terminal to a third terminal, to internal system components of the electronic device from the rechargeable storage unit and an input power source, the system power converter including a second switch; controlling, by control logic, the charging converter and the system power converter coupled to the control logic; determining whether a short exists using a current sensor; determining whether the short exists at the first terminal or the third terminal; in response to detecting a short at the first terminal, causing the charging converter to open the first switch; and in response to detecting a short at the third terminal, causing the system power converter to open the second switch. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification