At 10:45 PM 7/23/01 -0300, you wrote:

>Hello,

>

>    now I'm thinking about using a small signal transistor (BC548) to give

>the TIP41 more current.

>

>    Someone can point me how can I connect the two? May I use it the

>Darlington's way?

>

>    Regards,

>

>    Brusque

>


Why not a TIP121 or TIP132 darlington with Min. hfe 1000? Same package and pinout so you won't have to change the PCB. If you have extra CPU overhead, turn on the darlington and switch over to a 500Hz 1/3 or more duty cycle to minimize power dissipation.


Cheers

Terry



Design Consultant

T3DESIGN

Innovative Product Development

<italic>Thinking out of the box.</italic>

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