Electric charger and power supply device for portable terminal

Details Electric charger and power supply device for portable terminal Electric charger and power supply device for portable terminal

2007-02-27

2007-02-27

Easthom, Karl (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

Regulated discharging

C320S134000

Reexamination Certificate

active

10181451

ABSTRACT:
A charging control unit decides the number of battery cells on the basis of an output voltage of a battery pack, and an output voltage of a charging circuit is determined in accordance with the decided number of battery cells. Even though supply of an external power supply is detected, when a battery connection is not detected, the power supply circuit of the charging control unit is set in a stop state. In addition, when disconnection of the battery is detected, a canceling voltage for canceling a cutoff state caused by overdischarging of the battery is output. In a power supply device for a portable terminal, a capacitor electrically charged by an output voltage of main DC/DC converter is connected as an auxiliary power supply of a backup DC/DC converter to make exchange of the auxiliary battery unnecessary.

REFERENCES:
patent: 5581170 (1996-12-01), Mammano et al.
patent: 5945811 (1999-08-01), Hasegawa et al.
patent: 5959436 (1999-09-01), Takashina et al.
patent: 5982151 (1999-11-01), Nagai et al.
patent: 6057609 (2000-05-01), Nagai et al.
patent: 6297619 (2001-10-01), Terada
patent: 6795322 (2004-09-01), Aihara et al.
patent: 6-78467 (1994-03-01), None
patent: 06197468 (1994-07-01), None
patent: 9-65576 (1997-03-01), None
patent: 9-130983 (1997-05-01), None

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