SYSTEM AND METHOD FOR COMPENSATING FOR IMPEDANCE LOSS ASSOCIATED WITH AN EXTERNAL CHARGING UNIT
First Claim
1. A charging unit for charging a rechargeable battery on an external mobile device, the charging unit configured to be electrically coupled to the mobile device for electrical communication thereof, the charging unit comprising:
- a charging circuit comprising a charger, the charger configured to;
operate in a first mode to provide a constant pre-defined charge current to the external battery based on an output voltage of the charger;
operate in a second mode to provide a constant pre-defined charge voltage to the external battery;
switch from the first mode to the second mode when the output voltage of the charger reaches a predefined threshold voltage; and
an offset compensator configured for applying an offset voltage to the charger to maintain the charger in the first mode to compensate for impedance loss between the charger and the external battery thereby allowing the external battery voltage to reach the threshold voltage.
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Accused Products
Abstract
There is disclosed a charging unit for charging a rechargeable battery on an external mobile device, the charging unit configured to be electrically coupled to the mobile device for electrical communication thereof, the charging unit comprising: a charging circuit comprising a charger, the charger configured to: operate in a first mode to provide a constant pre-defined charge current to the external battery based on an output voltage of the charger; operate in a second mode to provide a constant pre-defined charge voltage to the external battery; switch from the first mode to the second mode when the output voltage of the charger reaches a predefined threshold voltage; and an offset compensator configured for applying an offset voltage to the charger to maintain the charger in the first mode to compensate for impedance loss between the charger and the external battery thereby allowing the external battery voltage to reach the threshold voltage.
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Citations
18 Claims
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1. A charging unit for charging a rechargeable battery on an external mobile device, the charging unit configured to be electrically coupled to the mobile device for electrical communication thereof, the charging unit comprising:
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a charging circuit comprising a charger, the charger configured to; operate in a first mode to provide a constant pre-defined charge current to the external battery based on an output voltage of the charger; operate in a second mode to provide a constant pre-defined charge voltage to the external battery; switch from the first mode to the second mode when the output voltage of the charger reaches a predefined threshold voltage; and an offset compensator configured for applying an offset voltage to the charger to maintain the charger in the first mode to compensate for impedance loss between the charger and the external battery thereby allowing the external battery voltage to reach the threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for charging an external battery on a mobile device by a charging unit, the charging unit configured to be electrically coupled to the mobile device for electrical communication thereof, the method comprising:
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operating in a first mode to provide a constant pre-defined charge current to the external battery based on an output voltage of the charger; operating in a second mode to provide a constant pre-defined charge voltage to the external battery; switching from the first mode to the second mode when the output voltage of the charger reaches a predefined threshold voltage; and applying an offset voltage to the charger to maintain the charger in the first mode to compensate for impedance loss between the charger and the external battery thereby allowing the external battery voltage to reach the threshold voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification