Power supply system for an electric/electronic apparatus

Details Power supply system for an electric/electronic apparatus Power supply system for an electric/electronic apparatus

1998-09-02

2000-06-20

Fleming, Fritz

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

307 64, 307 29, H02J 306

Patent

active

060781092

ABSTRACT:
A power supply system for an electric/electronic apparatus, such as a notebook computer and an expansion unit, which can be separated into a plurality of subunits or combined into one unit. When a DC power of an external power supply is applied to only an DC inlet A, a FET switch is turned off, so that the DC power at the DC inlet A is applied to both the DC/DC converters A and B. When the DC power of the external power supply is applied to both the DC inlets A and B, the FET switch is turned ON, so that the DC power at the DC inlet A is applied to the DC/DC converters A and the DC power at the DC inlet B is applied to the DC/DC converter B. The user can attach the AC adapter to only the DC inlet A or to both the DC inlets A and B to meet the system configuration, i.e., according to what kind of apparatus(es) is connected into the open slot(s).

REFERENCES:
patent: 4779007 (1988-10-01), Schlanger et al.

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