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Old 17th January 2013, 12:57 PM   #41
wahab is online now wahab  Algeria
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The VBEM device must be selected to provide low VCEsat as well
as very high beta.

Sanken produce a dedicated transistor for this application with
a 3A rating but still a remarkable beta of more than 500 and
typicaly in excess of 1000.
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Old 17th January 2013, 01:27 PM   #42
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Quote:
Originally Posted by wahab View Post
The VBEM device must be selected to provide low VCEsat as well
as very high beta.

Sanken produce a dedicated transistor for this application with
a 3A rating but still a remarkable beta of more than 500 and
typicaly in excess of 1000.
That device is available in the US, through Allegro or one of their affiliated parties.
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