Neil,
     What is your drive voltage for the throttle body motor? What=20
voltage does the throttle body require? The 2.25 you came up with is=20
actually the voltage drop. The power dissipation is 11.25 watts. P =3DI^2=20
* R. V =3D I*R. So your power dissipation is over 3 times the power rating=
=20
of your device.
Thanks,
rich!

On 7/28/2014 12:34 AM, Neil wrote:
> This is the first time I'm playing with motor control... using a
> TLE5205-2 motor controller/driver chip to run a large throttle body, and
> it's getting very hot.  I'm figuring there are a few reasons for this...
>
> (1) The throttle body is large -- drawing up to 4-5A continuous.
>

--=20
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