Power Management System Suitable for Use with Multi-Series-Cell Batteries
There are disclosed herein various implementations of a power management system for powering a portable device while charging a multi-series-cell battery of the portable device when the portable device is connected to an adapter. One exemplary implementation comprises a voltage regulator for powering the portable device and a multi-mode charger receiving input power from the adapter. The multi-mode charger is operated in a switching mode for charging the multi-series-cell battery concurrently with the voltage regulator powering the portable device. In another implementation, the power management system is adapted for use with a portable device having a single-cell battery.
1 . A power management system for powering a portable device while charging a multi-series-cell battery of said portable device when said portable device is connected to an adapter, said power management system comprising:
a voltage regulator for powering said portable device;
a multi-mode charger receiving input power from said adapter;
said multi-mode charger being in a switching mode for charging said multi-series-cell battery concurrently with said voltage regulator powering said portable device.
2 . The power management system of claim 1 , wherein said multi-mode charger is coupled directly to said adapter.
3 . The power management system of claim 1 , wherein said voltage regulator derives input power from said multi-series-cell battery of said portable device.
4 . The power management system of claim 1 , wherein said voltage regulator is coupled directly to said multi-series-cell battery of said portable device.
5 . The power management system of claim 1 , wherein said voltage regulator comprises a switching regulator.
6 . The power management system of claim 1 , wherein said voltage regulator and said multi-mode charger are implemented as an integrated circuit (IC) on a single semiconductor die.
7 . The power management system of claim 1 , wherein said portable device is a consumer electronics device.
8 . The power management system of claim 1 , wherein said portable device is a mobile communications device.
9 . The power management system of claim 1 , wherein said portable device is a digital media player.
10 . The power management system of claim 1 , wherein said portable device is a tablet computer.
11 . The power management system of claim 1 , wherein said multi-mode charger is configured to receive an adapter voltage of greater than approximately 5 volts from said adapter.
12 . A power management system for powering a portable device while charging a single-cell battery of said portable device when said portable device is connected to an adapter, said power management system comprising:
a voltage regulator receiving input power from said adapter;
said voltage regulator powering said portable device and a multi-mode charger;
said multi-mode charger being in a linear mode for charging said single-cell battery concurrently with said voltage regulator powering said portable device.
13 . The power management system of claim 12 , wherein said voltage regulator is coupled directly to said adapter.
14 . The power management system of claim 12 , wherein said voltage regulator comprises a switching regulator.
15 . The power management system of claim 12 , wherein said voltage regulator and said multi-mode charger are implemented as an integrated circuit (IC) on a single semiconductor die.
16 . The power management system of claim 12 , wherein said portable device is a consumer electronics device.
17 . The power management system of claim 12 , wherein said portable device is a mobile communications device.
18 . The power management system of claim 12 , wherein said portable device is a digital media player.
19 . The power management system of claim 12 , wherein said portable device is a tablet computer.
20 . The power management system of claim 1 , wherein said multi-mode charger is configured to receive an input voltage from said voltage regulator of less than or equal to approximately 5 volts.