Battery charge system and method capable of operating in different configurations
First Claim
1. A controller that is configurable to operate according to a selected one of a plurality of battery charger configurations, said controller comprising:
- a mode terminal and a control terminal;
mode logic, coupled to said mode terminal, that is configured to detect a mode value via said mode terminal wherein said mode value is indicative of one of an NVDC battery charging mode and a standard battery charging mode and that asserts a mode signal indicative thereof; and
control logic, coupled to said control terminal, that is configured to operate according to a selected one of said NVDC battery charging mode and said standard battery charging mode based on said mode signal and that operates a control signal provided to said control terminal indicative of said selected one of said NVDC battery charging mode and said standard battery charging mode.
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Accused Products
Abstract
A controller configurable to operate in either in an NVDC mode or a standard mode. The controller includes mode logic that detects a mode value indicative of the selected mode and that asserts a corresponding mode signal, and control logic that is configured to operate according to the selected battery charging mode based on the mode signal and that provides a control signal accordingly. In the standard mode, the control signal is in either an on or off state depending upon presence of an external adapter and the charge state of the battery. In the NVDC mode, the control signal may operate in a linear mode if the battery is deeply discharged. A battery detector provides a battery indication that is used to switch the regulation operating point of an external system voltage. A power monitor output provides an indication of power being provided via the system voltage.
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Citations
20 Claims
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1. A controller that is configurable to operate according to a selected one of a plurality of battery charger configurations, said controller comprising:
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a mode terminal and a control terminal; mode logic, coupled to said mode terminal, that is configured to detect a mode value via said mode terminal wherein said mode value is indicative of one of an NVDC battery charging mode and a standard battery charging mode and that asserts a mode signal indicative thereof; and control logic, coupled to said control terminal, that is configured to operate according to a selected one of said NVDC battery charging mode and said standard battery charging mode based on said mode signal and that operates a control signal provided to said control terminal indicative of said selected one of said NVDC battery charging mode and said standard battery charging mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic device, comprising:
a battery charge system, comprising; a converter and battery charger circuit that is configured according to a selected one of an NVDC battery charging configuration and a standard battery charging configuration, wherein said converter and battery charger circuit includes at least one switch control input for controlling switching to regulate a system voltage on an output node and further includes a battery control input; a mode select circuit indicative of an NVDC battery charging mode for said NVDC battery charging configuration and a standard battery charging mode for said standard battery charging configuration; and a controller having a mode terminal coupled to said mode select circuit and having at least one switch control output coupled to said at least one switch control input of said converter and battery charger circuit, wherein said controller is configured to provide a battery control signal via a battery control terminal to said battery control input to operate said converter and battery charger circuit according to said selected one of said NVDC battery charging mode and said standard battery charging mode. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of operating a controller that is configured to operate according to a selected one of an NVDC battery charging mode and a standard battery charging mode, comprising:
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receiving an adapter indication that indicates presence of an AC/DC adapter; receiving a battery voltage; receiving a mode value indicative of one of the NVDC battery charging mode and the standard battery charging mode; providing a battery switch control signal which operates according to the NVDC battery charging mode or the standard battery charging mode based on the mode value; wherein when the NVDC battery charging mode is indicated, said providing a battery switch control signal comprises; operating the battery switch control signal in a linear mode when the AC/DC adapter is present and when the battery voltage is less than a predetermined minimum level; operating the battery switch control signal in a selected one of an off state and an on state when the AC/DC adapter is present and when the battery voltage is at least the predetermined minimum level; and operating the battery switch control signal in the on state when the AC/DC adapter is absent and when the battery voltage is at least the predetermined minimum level; and wherein when the standard battery charging mode is indicated, said providing a battery switch control signal comprises operating the battery switch control signal in the off state when the when the AC/DC adapter is present and operating the battery switch control signal in the on state when the AC/DC adapter is present and the battery voltage is at least the predetermined minimum level. - View Dependent Claims (19, 20)
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Specification