Inductorless step-up and step-down converter with inrush current

Details Inductorless step-up and step-down converter with inrush current Inductorless step-up and step-down converter with inrush current

1997-11-19

1999-10-26

Wong, Peter S.

Electric power conversion systems

Current conversion

With voltage multiplication means

363 62, 323908, 307110, H02M 318, H02M 306

Patent

active

059739444

ABSTRACT:
A switching regulator circuit using a common switch network on a single IC for providing step-up and step-down DC--DC conversion is provided. The switching regulator uses switched capacitor techniques and hence avoids EMI, parasitic and stability concerns particular to inductors and transformers. The converter circuit includes control circuitry for sensing the voltage differential between the input and output to determine whether step-up or step-down mode is to be used. The control circuitry also senses the voltage differential between the input and output and enables the minimum number of switch sections needed to fully regulate the output, using the highest switch resistance possible to minimize inrush current from the input to the output.

REFERENCES:
patent: 3553479 (1971-01-01), Nelson
patent: 4415961 (1983-11-01), Harmon, Jr.
patent: 4451743 (1984-05-01), Suzuki et al.
patent: 5461557 (1995-10-01), Tamagawa
patent: 5581454 (1996-12-01), Collins
patent: 5596489 (1997-01-01), Bazes

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