Electrical power supply with low-loss inrush current limiter and

Details Electrical power supply with low-loss inrush current limiter and Electrical power supply with low-loss inrush current limiter and

1998-06-05

2000-07-25

Han, Jessica

Electricity: power supply or regulation systems

Output level responsive

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

363 49, 363 50, 323908, G05F 152, H02H 710

Patent

active

060940360

ABSTRACT:
An electrical power supply (EPS) including a voltage regulator (SR1) and an inrush current limiter (ICL1) having a current limiting circuit (CL1) and a support capacitor (C1). Charging current spikes produced in particular when the electrical power supply (EPS) is switched on are limited by the current limiting circuit (CL1). The current limiting circuit (CL1) is connected in series with the support capacitor (C1), thus preventing load current from flowing through the current limiting circuit. A step-up converter circuit (SUC) is connected upstream of the current limiting circuit (CL1) with the particular purpose of increasing the voltage (V). An advantage of the arrangement is that, due to the step-up converter circuit (SUC), the support capacitor (C1) has considerably improved support characteristics with regard to the switching regulator (SR1). Furthermore, the boosted voltage (V) at the terminals (T1 and T3) of the inrush current limiter (ICL1) considerably reduces the disruptive effects of interference voltages caused by the switching regulator (SR1). Additional interference suppression, e.g., by means of a costly radiointerference suppression network, is thereby advantageously rendered unnecessary.

REFERENCES:
patent: 5122724 (1992-06-01), Criss
patent: 5216586 (1993-06-01), Saito
patent: 5420780 (1995-05-01), Bernstein et al.
patent: 5786685 (1998-07-01), Lange et al.
patent: 5796182 (1998-08-01), Martin
patent: 5834924 (1998-11-01), Konopka et al.
Japanese Patent Abstract for JP 1-133567, published May 25, 1989.
Japanese Patent Abstract for JP 5-38139, published Feb. 12, 1993.

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