All digital switching regulator for use in power supplies, batte

Details All digital switching regulator for use in power supplies, batte All digital switching regulator for use in power supplies, batte

1995-06-28

1997-10-07

Berhane, Adolf

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323283, G05F 140

Patent

active

056752407

ABSTRACT:
A switching regulator is composed of digital circuits only. A switching regulator (30) comprises a driver (2) for directly controlling the operation of a switching transistor (1), and an OR gate (6) for determining the logic issued by the driver (2). An output terminal (Q) of an RS flip-flop (5) is connected to one input end of the OR gate (6), the output of a timer (40c) is applied to a set terminal (S) of the RS flip-flop (5), and the output of a comparator (4) is applied to a reset terminal (R1) through an OR gate (7). At a non-reverse input end of the comparator (4), a reference voltage (VE) is applied by a D/A convertor (40b), while a feedback voltage (VFB) is applied to a reverse input end. Accordingly, chopping of the switching transistor (1) is done on the basis of a rectangular pulse.

REFERENCES:
patent: 4455526 (1984-06-01), Miller
patent: 4518867 (1985-05-01), Lamboley
patent: 4975820 (1990-12-01), Szepesi
patent: 5057765 (1991-10-01), Clark et al.
patent: 5399958 (1995-03-01), Iyoda
patent: 5528125 (1996-06-01), Marshall et al.
patent: 5565761 (1996-10-01), Hwang
Transistor Technique, Jan. 1994, pp. 299-312, "Switching Regulator IC for Onboard".

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