US 9,812,878 B1 | ||
Dynamic current redistribution for portable electronic devices | ||
Marcel Colman Eric Stieber, Sunnyvale, CA (US); Thomas Gang Wang, San Jose, CA (US); and Vidhyananth Ramasamy Venkatasamy, Sunnyvale, CA (US) | ||
Assigned to Amazon Technologies, Inc., Seattle, WA (US) | ||
Filed by Amazon Technologies, Inc., Seattle, WA (US) | ||
Filed on Dec. 14, 2015, as Appl. No. 14/968,325. | ||
Application 14/968,325 is a continuation in part of application No. 14/744,782, filed on Jun. 19, 2015. | ||
Int. Cl. G06F 1/26 (2006.01); H02J 7/00 (2006.01) |
CPC H02J 7/0021 (2013.01) [H02J 7/007 (2013.01); H02J 7/0052 (2013.01)] | 20 Claims |
1. A method comprising:
determining, by a user device, that a charging adapter is connected to the user device, the user device comprising a first
battery and a power management integrated circuit;
determining, by the user device using a power management integrated circuit, that the charging adapter has a rated maximum
output current value;
determining that the rated maximum current value is greater than a first maximum charging load value of the first battery;
charging the first battery at the first maximum charging load value with a first charging current;
determining that a second battery is connected to the user device, the second battery having a second maximum charging load
value that is greater than the first maximum charging load value;
determining a second charging current value that is a difference between the rated maximum current value and the first maximum
charging load value;
charging the second battery at the second charging current value with a second charging current;
determining that the second charging current value is less than the second maximum charging load value;
increasing the second charging current to a third charging current value, wherein the third charging current value is less
than the second maximum charging load value;
determining, by the user device using the power management integrated circuit, that an input voltage at the user device is
equal to or greater than 4.75 volts;
increasing the second charging current to a fourth charging current value, wherein the fourth charging current value is less
than the second maximum charging load value;
determining that the input voltage is less than 4.75 volts; and
reducing the second charging current to a fifth charging current value.
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