Current-sharing circuit for parallel-coupled switches and switch

Electricity: power supply or regulation systems – In shunt with source or load – Using a three or more terminal semiconductive device

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Details

323222, 323907, G05F 1613

Patent

active

059091088

ABSTRACT:
For use in a switch-mode power converter including parallel-coupled first and second switches, the first switch having a temperature-dependent resistance, a circuit for, and method of, distributing current between the first and second switches. In one embodiment, the circuit includes a device having a temperature-dependent characteristic, in thermal communication with the first switch and electrically coupled to a gate of the first switch, that senses a temperature of the first switch, modulates an amplitude of a drive waveform applied to the gate based on the temperature and thereby redistributes the current.

REFERENCES:
patent: 5642027 (1997-06-01), Windes et al.
patent: 5723956 (1998-03-01), King et al.
patent: 5729119 (1998-03-01), Barbour
"New 3rd-Generation FUJI IGBT MODULES N series Application Manual," Chapter 2, pp. 2-2--2-8 and 8-2--8-4. No date.
S. Clemente, A. Dubhashi and B. Pelly, "IGBT Characteristics," pp. E-3--E-14. No date.
Steve Clemente, "Application Characterization of IGBTs," pp. E-15--E-32. No date.

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