Integrated circuit high voltage DC converter

Details Integrated circuit high voltage DC converter Integrated circuit high voltage DC converter

1976-06-14

1978-01-31

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

315241P, 363 95, H02P 1322

Patent

active

040718840

ABSTRACT:
A step-up DC converter suitable for construction as an integrated circuit chip provides a separate rectangular wave oscillator using a silicon transistor and a power amplifier driven thereby which supplies current to the primary winding of a two-winding step-up transformer matched to the constant duty cycle of the oscillator thereby simplifying construction of the transformer and permitting the oscillator and power amplifier voltage step-up transformer functions to be individually optimized for overall high efficiency operation. A hysteresis switching voltage comparator senses the rectified value of the high voltage output from the transformer relative to a stable reference voltage and switches both the oscillator and the amplifier to their standby current condition when a predetermined high output voltage level is obtained and switches both oscillator and amplifier into conduction when the output voltage falls to a predetermined level. A second comparator operates an LED indicator when the output voltage is above a certain level.

REFERENCES:
patent: 3213344 (1965-10-01), Jensen
patent: 3660753 (1972-05-01), Judd et al.
patent: 3771040 (1973-11-01), Fletcher et al.
patent: 3859563 (1975-01-01), Vogt
patent: 3919625 (1975-11-01), Barton

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