Power Electronics Handbook

Appendix 2

Glossary of terms

Anti-parallel: The connection of two unidirectional power devices in

parallel, such that they conduct in opposite half

cycles.

This is also known

as an inverse parallel or a back-to-back connection.

Avalanche breakdown: The conduction mechanism within a semiconductor

when minority carriers attain sufficient energy to cause a chain reaction,

resulting in very rapid build-up of current.

Bi-directional device: A power semiconductor capable of conducting in

both directions.

Blocking voltage: A measure of the voltage which a power semiconductor

can withstand, in the forward or reverse direction, without breaking down ...