Versatile battery charging system and control method
AssigneeHalo Microelectronics International
InventorRui Liu
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Abstract
A battery charging system includes a buck switching converter configured to operate in either a buck mode or a boost mode depending on a system reconfiguration, a linear charger having a first terminal and a second terminal, wherein at least one terminal of the first terminal and the second terminal of the linear charger is used for the system reconfiguration, and a switched capacitor converter configured to operate in either a 2:1 charge pump mode or a 1:2 reverse charge pump mode depending on the system reconfiguration.
Claims25
A reconfigurable battery charging system suitable for charging either a single-cell battery or a dual-cell battery, comprising:
- a buck switching converter;
- a switched capacitor converter;
- and
- a linear charger having a first terminal and a second terminal, wherein power switches of the linear charger and the switched capacitor converter are in a first integrated circuit package mounted on a printed circuit board, and the second terminal of the linear charger is directly connected to a pad on the printed circuit board, and wherein when the reconfigurable battery charging system is configured to charge the single-cell battery, the second terminal of the linear charger is connected to an input terminal of the switched capacitor converter through a first connection trace on the printed circuit board, and the switched capacitor converter is operating at a 2:1 down converting mode to receive current from the linear charger to charge the single-cell battery, and when the reconfigurable battery charging system is configured to charge the dual-cell battery, the first terminal of the linear charger is connected to the input terminal of the switched capacitor converter through a second connection trace on the printed circuit board, and the switched capacitor converter is operating at a 1:2 up converting mode to provide current to the linear charger to charge the dual-cell battery.
A method comprising:
- reconfiguring a reconfigurable battery charging system for charging a single-cell battery through applying a plurality of single-cell charging connection patterns to the reconfigurable battery charging system;
- and
- reconfiguring the battery charging system for charging a dual-cell battery through applying a plurality of dual-cell charging connection patterns to the reconfigurable battery charging system, wherein the reconfigurable battery charging system comprises a switch, a buck switching converter, a linear charger and a switched capacitor converter, and wherein:
- when the reconfigurable battery charging system is configured to charge the single-cell battery, a second terminal of the linear charger is connected to an input terminal of the switched capacitor converter, and the switched capacitor converter is operating at a 2:1 down converting mode to receive current from the linear charger to charge the single-cell battery;
- and
- when the reconfigurable battery charging system is configured to charge the dual-cell battery, a first terminal of the linear charger is connected to the input terminal of the switched capacitor converter, and the switched capacitor converter is operating at a 1:2 up converting mode to provide current to the linear charger to charge the dual-cell battery, and wherein the second terminal of the linear charger is directly connected to a pad on a printed circuit board and further connected to the input terminal of the switched capacitor converter through a connection trace on the printed circuit board.
Dependencies are inferred from the claim text.