Control circuit for a chopped power supply with progressive star

Details Control circuit for a chopped power supply with progressive star Control circuit for a chopped power supply with progressive star

1986-02-07

1987-09-08

Wong, Peter S.

Electric power conversion systems

Current conversion

With starting arrangement

363 97, 323901, H02P 1322

Patent

active

046928537

ABSTRACT:
A chopped power supply control circuit is provided intended to receive regulation control signals and to produce square waves for enabling a switch. A current comparator measures the current in the switch and opens the switch when the threshold is exceeded. Under normal operating conditions the threshold is fixed. Under start-up conditions of should a malfunction occur a threshold variation circuit causes the threshold to vary gradually from a low value to its normal value. Thus the risk of over-current at start-up is reduced.

REFERENCES:
patent: 3733540 (1972-02-01), Hawkins
patent: 3879647 (1975-04-01), Hamilton et al.
patent: 4195335 (1980-03-01), Murakami et al.
patent: 4272805 (1981-06-01), Iguchi et al.
patent: 4400767 (1983-08-01), Fenter
patent: 4504898 (1985-03-01), Pilukaitis et al.
patent: 4586120 (1986-04-01), Malik et al.
E.D.N. Electrical Design News, vol. 29, No. 18, Sep. 1984, pp. 213-220, Boston, U.S.; G. Gattavari: "Design Custom Power Sources with Switching-Regulator Chip".

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