BATTERY CHARGE CONTROL CIRCUIT
First Claim
1. A DC-DC voltage down-converter for an electronic device supplied by a battery and having a bus interface for the interconnection with another electronic device capable of supplying electric power, the DC-DC voltage down-converter including:
- a terminal adapted to be coupled to a voltage supply line of the bus interface and operable to receive an input current from the another electronic device;
an electric energy storage element coupled between the battery and the terminal, the electric energy storage element being operable to store/release electric energy;
a drive circuit arranged to control the storage/release of the electric energy storage element, so as to cause electric power generated by the input current supplied by the another electronic device through the voltage supply line to re-charge the battery; and
an input current feedback control circuit coupled to the terminal and arranged to monitor a value of the input current and generate a corresponding input current indication related to the monitored value of the input current, wherein the drive circuit is configured to control the storage/release of the electric energy storage element according to the input current indication.
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Accused Products
Abstract
A DC-DC voltage down-converter for an electronic device supplied by a battery and having a bus interface for the interconnection with another electronic device capable of supplying electric power is provided. The DC-DC voltage down-converter includes a terminal coupled to a voltage supply line of the bus interface and operable to receive a input current from the another electronic device. The DC-DC voltage down-converter further includes an electric energy storage element coupled between the battery and the terminal, the electric energy storage element being operable to storage/release electric energy and a drive circuit arranged to control the storage/release of the electric energy storage element, so as to cause an electric power generated by the input current supplied by the another electronic device through the voltage supply line to re-charge the battery. The DC-DC voltage down-converter still further includes a input current feedback control circuit coupled to the terminal and arranged to monitor a value of the input current and generate a corresponding input current indication; the drive circuit configured to control the storage/release of the electric energy storage element according to the input current indication.
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Citations
11 Claims
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1. A DC-DC voltage down-converter for an electronic device supplied by a battery and having a bus interface for the interconnection with another electronic device capable of supplying electric power, the DC-DC voltage down-converter including:
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a terminal adapted to be coupled to a voltage supply line of the bus interface and operable to receive an input current from the another electronic device; an electric energy storage element coupled between the battery and the terminal, the electric energy storage element being operable to store/release electric energy; a drive circuit arranged to control the storage/release of the electric energy storage element, so as to cause electric power generated by the input current supplied by the another electronic device through the voltage supply line to re-charge the battery; and an input current feedback control circuit coupled to the terminal and arranged to monitor a value of the input current and generate a corresponding input current indication related to the monitored value of the input current, wherein the drive circuit is configured to control the storage/release of the electric energy storage element according to the input current indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling the transfer of electric power to an electronic device supplied by a battery, the electric power being supplied by another electronic device adapted to be interconnected to the electronic device through a bus interface, the method comprising:
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receiving a input current from the another electronic device through a voltage supply line of the bus interface; storing/releasing electric energy into/from an electric energy storage element; controlling the storage/release of the electric energy storage element, so as to cause an electric power generated by the input current supplied by the another electronic device through the voltage supply line to re-charge the battery; monitoring a value of the input current; and generating a corresponding input current indication related to the monitored value of the input current, the storing/releasing electric energy into/from electric energy storage element being carried out according to the input current indication.
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Specification