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suppresion diodes

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qtommer

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this is the link to the datasheet for the ULN2803 darlington array IC
http://www.datasheetcatalog.org/datasheets/90/366828_DS.pdf

in the datasheet, there are diodes which the datasheet identifies as suppresion diodes for inductive loads. What does this mean? Is it a form of protection? Some sources indicate that those are free wheeling diodes..What does the term free wheeling imply?

secondly, there are also another 2 diodes in the schematic diagram connected to each darlington pair. What are the functions of those two diodes? I sort of have a rough idea that its a form of protection but would like to understand it clearly.

Help is extremely appreciated.

Thanks=)
 

MikeMl

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