Mobile phone charger

Details Mobile phone charger Mobile phone charger

2007-11-29

2010-10-26

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

For handheld device

C320S103000, C320S112000

Reexamination Certificate

active

07821228

ABSTRACT:
A charger includes a battery module, a boosting and charging circuit, a low voltage boosting circuit, and a charging interface. The battery module provides an operating voltage for the boosting and charging circuit and the low voltage boosting circuit. When the operating voltage is greater than a reference voltage of the boosting and charging circuit, the boosting and charging circuit module works and outputs a charging voltage to the charging interface. When the operating voltage is smaller than the reference voltage of the boosting and charging circuit but greater than a starting voltage of the low voltage boosting circuit, the low voltage boosting circuit works and boosts the operating voltage to the boosting and charging circuit, and then the boosting and charging circuit module works and outputs the charging voltage to the charging interface for the mobile phone.

REFERENCES:
patent: 5637978 (1997-06-01), Kellett et al.
patent: 5717308 (1998-02-01), Nishitani et al.
patent: 2002/0190691 (2002-12-01), Chen
patent: 2004/0046673 (2004-03-01), Kovarik et al.
patent: 2005/0189913 (2005-09-01), Vitanov et al.

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