I like Sean's reply.

I've been in this position before. You **do** have to read datasheets=20
**really** carefully!

Also, if the circuit is on breadboard - is the breadboard ok?
- Wires crossed?
- Poor termination?
- Wrong components placed?
- Handling practices of specific components eg.anti-static followed ?
- Other?
- Other?
- Other?

Adiagram would help members trying to help you - you do have a diagram=20
drawn for yourself to follow don't you ? If not then this is the=20
starting point of failure.

On 20/08/2013 7:41 AM, Sean Breheny wrote:
> I agree with the suggestion that you should pick one particular
> configuration and give us the details of that, including a schematic.
>
> I've never heard of a mosfet driver IC that takes +/- 12V. What part are
> you using?
>
> As for op-amps - beware that some datasheets have a strange way of
> describing maximum voltages. Say, for example, the abs max operating
> voltage might be given as 20V but then the rest of the datasheet talks
> about positive and negative supply voltages. In such a case, this likely
> means that the total voltage from positive supply pin to negative one is
> 20V (so +/-10V max for symmetrical supplies).
>
> Also, "Absolute Maximum" ratings are not necessarily safe to run *at* or
> *near*, especially if you are causing some other kind of stress at the sa=
me
> time. For example, a device might have a 12V maximum recommended supply b=
ut
> 20V abs max rating for the supply. If you apply 20V by itself, the part i=
s
> undamaged. However, if you apply 20V and draw significant current from th=
e
> output, then it might be over-stressed.
>
> The "indefinite short circuit" rating can also be deceptive. This does no=
t
> mean that it is impossible to damage the part due to overheating. First,
> this rating likely is given under some particular set of test conditions
> which are more benign than the limits. Secondly, a dead short may actuall=
y
> be detected by the part whereas a heavy load may not trigger the
> short-circuit protection. Finally, some parts are really not designed for=
 a
> continuous short and can only tolerate it if there is some magical coolin=
g
> that keeps their case at 25 deg C, yet the manufacturers will claim
> "tolerance" to indefinite short circuit and then have this 25 deg C case
> temp requirement as a fine-print caveat.
>
>
--=20
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