Method and system using a battery voltage loop under high-current conditions
AssigneeRenesas Electronics America Inc.
InventorsSungkeun Lim, Yen-Mo Chen, Bin Li
Life of this patent
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Abstract
Systems and methods for using a battery voltage loop under high-current conditions are described. A method for operating a charger, the method includes setting, by a charger controller, a battery voltage threshold; setting, by the charger controller, an on-the-go (OTG) voltage threshold; computing, by a first comparator, a battery voltage error based on a difference between a battery voltage and the battery voltage threshold; computing, by a second comparator, an OTG voltage error based on a difference between an OTG voltage and the OTG voltage threshold; and selecting, by a loop selector, a battery voltage loop when the battery voltage error is smaller than the OTG voltage error.
Claims20
A semiconductor device, comprising:
- a charger comprising a charger controller and a power stage, the power stage having a power stage first side and a power stage second side, the power stage first side configured to connect to a voltage-sensitive component, the power stage second side configured to connect to a load;
- and
- a battery monitor coupled to the charger, the battery monitor configured to receive power from a battery and to conduct power from the battery to the power stage first side and the voltage-sensitive component at a system voltage, the battery monitor configured to provide a battery voltage to the charger controller, the battery voltage being related to the system voltage, the power stage second side configured to provide power to the load at an on-the-go (OTG) voltage,
- wherein the charger controller includes a first comparator configured to compare the battery voltage to a battery voltage threshold and compute a battery voltage error,
- wherein the charger controller includes a second comparator configured to compare the OTG voltage to an OTG voltage threshold and compute an OTG voltage error, and
- wherein the charger controller is configured to disable driving the power stage second side to the load when the battery voltage error is less than the OTG voltage error.
A semiconductor system, comprising:
- a voltage-sensitive component;
- a charger comprising a charger controller and a power stage, the power stage having a power stage first side and a power stage second side, the power stage first side configured to connect to a voltage-sensitive component, the power stage second side configured to connect to a load;
- a battery;
- and
- a battery monitor coupled to the charger, the battery, and the voltage-sensitive component, the battery monitor configured to receive power from the battery and conducting power from the battery to the power stage first side at a system voltage, the battery monitor configured to provide a battery voltage to the charger controller, the battery voltage being related to the system voltage, the power stage second side configured to provide power to the load at an on-the-go (OTG) voltage,
- wherein the charger controller includes a first comparator configured to compare the battery voltage to a battery voltage threshold and compute a battery voltage error,
- wherein the charger controller includes a second comparator configured to compare the OTG voltage to a load voltage threshold and compute an OTG voltage error, and
- wherein the charger controller is configured to disable driving the power stage second side to the load when the battery voltage error is less than the OTG voltage error.
A method for operating a charger, the method comprising:
- setting, by a charger controller, a battery voltage threshold;
- setting, by the charger controller, an on-the-go (OTG) voltage threshold;
- computing, by a first comparator, a battery voltage error based on a difference between a battery voltage and the battery voltage threshold;
- computing, by a second comparator, an OTG voltage error based on a difference between an OTG voltage and the OTG voltage threshold;
- and
- selecting, by a loop selector, a battery voltage loop when the battery voltage error is smaller than the OTG voltage error.
Dependencies are inferred from the claim text.