Battery charger with control circuit

Details Battery charger with control circuit Battery charger with control circuit

1996-04-23

1997-12-02

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

H01M 1046

Patent

active

056940254

ABSTRACT:
A battery charger (10) is provided with a power supply (26) which is energized by a main winding (22) and a bias winding (24) on the secondary side (18) of an input transformer (14). The charger switches a main voltage level provided at a main voltage output (28) according to a pulse width modulation scheme, and has an output section (36) for filtering the switched voltage. A power switch (38) is coupled between the output section and the main voltage output, and is driven by a bias switch (48) coupled between the control terminal (50) of the power switch, and a bias voltage output (30), which provides a bias voltage level that is higher then the main voltage level by a minimum delta.

REFERENCES:
patent: 4308577 (1981-12-01), Mentler
patent: 4560918 (1985-12-01), Callen
patent: 4888545 (1989-12-01), Celenza et al.
patent: 5124906 (1992-06-01), Kang
patent: 5479087 (1995-12-01), Wright

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