Integrated circuit voltage regulator and charging system

Details Integrated circuit voltage regulator and charging system Integrated circuit voltage regulator and charging system

1988-09-26

1989-11-21

Hickey, R. J.

Electricity: single generator systems

Generator control

With excitation winding and/or circuit control

322 73, 322 88, H02J 716, H02P 910

Patent

active

048825310

ABSTRACT:
Integrated circuit voltage regulator (60; 81; 91) is provided for use in a battery charging system (10) for providing excitation current to a field coil (13) of an alternator (11). The integrated circuit voltage regulator includes a transistor (70) which is selectively switched on and off to implement the prior art diesel diode (26) functions of providing initial field coil excitation current while preventing undesired current flow from an alternator voltage supply terminal (20) during subsequent field coil excitation current. The transistor (70) is provided as part of an integrated circuit and, therefore, eliminates the need for a diesel diode (26) external to the integrated circuit. In addition, use of the switched transistor (70) minimizes voltage drop loss when providing initial field excitation current. Constructing the transistor (70) as a PNP vertical substrate transistor minimizes integrated circuit area and simplifies integrated circuit topology.

REFERENCES:
patent: 3568041 (1971-03-01), Arakane
patent: 3593102 (1971-07-01), Kawashima et al.
patent: 3611112 (1971-10-01), Lehinoff
patent: 3982169 (1976-09-01), Cummins
patent: 4293811 (1981-10-01), Muto et al.
patent: 4386310 (1983-05-01), Sievers
patent: 4388586 (1983-06-01), Lamoth
patent: 4388587 (1983-06-01), Lamoth et al.
patent: 4451776 (1984-05-01), Iwaki et al.

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