No, don't have to use this one, though I'm hoping I can tweak the=20
control values (PWM freq etc) to get it to work for now (for proof of=20
concept of a bigger system) as I have a board with it already.  I was a=20
late addition to a bigger project which is near it's end stages, so=20
don't want to hold things up for now.  Later I will switch to something=20
else.

Hadn't thought about followers, but I like that for an interim patch...=20
I would think this would help me recover some voltage rather than lose=20
more -- the TLE5205 would drive much lower current to an op-amp, then=20
have the op-amp drive high- and low-side FET's to drive the motor.  The=20
significant voltage drop through the TLE5205 would be negligible instead=20
of 2.25V-3.75V as calcs indicate I should be losing now.  I can add some=20
crude protection by monitoring the current through the current through=20
say a 0.1-ohm resistor.  But now I have most of an external h-bridge,=20
right? ;)

Cheers,
-Neil.



On 7/28/2014 10:31 AM, RussellMc wrote:
> On 28 July 2014 17:34, Neil <picdude3@narwani.org> wrote:
>
>> TLE5205-2
>
> Datasheet
>
> http://www.infineon.com/dgdl/TLE5205-2_DS_11%5B1%5D.pdf?folderId=3Ddb3a30=
431b3e89eb011bb632994f065b&fileId=3Ddb3a30431f848401011fc747c7a0797f&ack=3D=
t
>
> Do you have to use this part?
> Rdson is poor by modern standards.
>
> You could (perhaps) add followers - but lose voltage and protection :-(.
>
>
>
>             R

--=20
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