opamp

[Kajover]

Hi,

could you please help me design a circuit and choose the best parts for an operational amplifier that has +/-5V as an input an 1A as output? Thank you very much.

Kind regards

[awallin]

Hi,
could you please help me design a circuit and choose the best parts for an operational amplifier that has +/-5V as an input an 1A as output? Thank you very much.
Kind regards

need more specs. what is the source that should generate +/-5V? what ripple/noise is acceptable? what cost is acceptable?

[Kajover]

Source: do not know (+/-5V)
Ripple/noise: low noise would be preferable
cost: lower than 10€ for the op amp

[awallin]

still not sure what you are asking for...
I've used an opa569 for a +/-1A TEC-drive
http://www.ti.com/lit/ds/symlink/opa569.pdf

the circuit is explained here: http://www.anderswallin.net/2014/09/tec-drive-v2/

[Kajover]

thank you... for i_limit, where does 9800 and 1.18V come from?

[awallin]

thank you... for i_limit, where does 9800 and 1.18V come from?

page 3 towards the end "current limit"
http://www.ti.com/lit/ds/symlink/opa569.pdf

keep in mind this is a linear device so it will dissipate P=U*I power and may need cooling (heatsink and/or fan)

[Muxr]

Hi,

could you please help me design a circuit and choose the best parts for an operational amplifier that has +/-5V as an input an 1A as output? Thank you very much.

Kind regards

Op amps are sort of the do it all parts of the analog world. They can do all sorts of things, but sometimes they aren't the best or the most economical part to use for a given task. There are so many different types of op-amps. Without really knowing even some of the basics of what you intend to do with them, it's really hard to recommend a good one for your application. For one 1A op-amps are pretty special, as 1A is a lot of current. Most op-amps drive much less than that.

[Morgoroth]

and what about an opamp and a mosfet ?, both cheap and very flexible on design.