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Battery charging system with power management of plural peripheral devices
| Details |
Inventors: Fernandez, Jose M.; Maierhafer, Daniel L.;
Assignee: Motorola, Inc. (Schaumburg, IL)
Primary Examiner: Wong; Peter S.
Assistant Examiner: Toatley, Jr.; Gregory J.
Attorney, Agent or Firm: Garrett; Scott M., Massaroni; Kenneth M.
A battery charging system (10) includes a charger (12), power supply (14), electrical device (16), external battery (18), and peripheral device (20). The charger (12) provides connections between the various components such that the electrical device (16), which is a portable electronic device, may communicate with the peripheral device (20). The components are kept small by providing the power supply (14) with a feedback input (26). The power supply generates a voltage output (24) which is at a preselected differential above the feedback level, thus minimizing overhead voltage levels and allowing efficient linear regulation in the electrical device (16) for battery recharging. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the invention will be better understood from a consideration of the following description in conjunction with the drawing figures, in which like reference numerals are carried forward.
Referring now to FIG.
1, which illustrates a block diagram of a battery charging system 10 in accordance with the instant invention, there is shown generally a charger 12 and various system components including power supply 14, electrical device 16, external battery 18, and peripheral device 20.
It should be noted that all components shown are referenced to a common voltage potential, and as such, ground connections are not shown for the sake of clarity.
It should be assumed, therefore, that each component has a ground potential that is connected to the power supply reference potential through the charger.
The charger 12 is the central part of the system while the other components are electrically interconnected to the charger 12, and may be electrically interconnected to each other through the charger 12.
This is accomplished by providing features on the charger for mechanically receiving the various components, and typically a plurality of electrical contacts disposed in the ports to mate with corresponding electrical contacts on the various components.
Through these contacts both power and signals may be transmitted between the components.
There exist numerous means by which electrical devices may be so interconnected.
The power supply 14 is connected to an AC power source 22, and provides a regulated DC voltage level at output 24.
Input 26 receives a feedback voltage level from the other components, as is described hereinbelow, and adjusts the output voltage level at the output 24 to be at a preselected differential above the feedback voltage level.
All of the system components are powered by the output voltage of the power supply by regulating the output voltage level
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Electrical and Wave 
