Apparatus and method for forced sharing of parallel MOSFET switc

Details Apparatus and method for forced sharing of parallel MOSFET switc Apparatus and method for forced sharing of parallel MOSFET switc

1992-06-26

1995-03-21

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Load current control

307 82, H02J 300

Patent

active

053999088

ABSTRACT:
A system for sharing of switching losses of parallel transistors is disclosed. The system includes a plurality of switching transistors connected in parallel for providing a current to a load. A pulse generator provides pulse width modulated pulse cycles in response to the load current each pulse cycle having a pulse signal. An alternate selector is responsive to said pulse cycles, and provides the pulse cycles to the transistors, such that for each pulse cycle a predetermined transistor turns ON substantially prior to the other transistors, dissipating substantially all the turn ON losses, and a predetermined transistor turns OFF substantially later than other transistors, dissipating substantially all the turn OFF losses.

REFERENCES:
patent: 4811184 (1989-03-01), Koninsky et al.
patent: 4890210 (1989-12-01), Myers
patent: 5070292 (1991-12-01), Goff
patent: 5081409 (1992-01-01), Goff
patent: 5084666 (1992-01-01), Bolash
patent: 5253155 (1993-10-01), Yamamoto

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