Power Management System Suitable for Use with Multi-Series-Cell Batteries

• US 20130073877A1
• Filed: 12/05/2011
• Published: 03/21/2013
• Est. Priority Date: 09/20/2011
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Radke, Russell
• Application Number:
  US13/311,442
• Publication Number:
  US 20130073877A1
• Time in Patent Office: Days
• US Class Current: 713/300
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence

Abstract

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.

Claims

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.

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.

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.