At 03:21 PM 5/19/2005 -0300, you wrote:


>Hi guys
>
>I am designing a circuit which will control a dc motor. In this
>circuit I don't need linear speed control, I intend to use the full
>speed or nothing (no pwm needed). The dc motor is 4A for 24V, and I
>need to control the direction of rotation.
>
>This circuit currently operates with relays, but I would like to use a
>more compact approach, and I was thinking about using one of those
>modules which already have internal drive and mosfets. I found some of
>these ICs, but most of them don't fit well with my needs (24V x
>4A). IR3220 is one example of such device.
>
>Do you have any tips about what IC could I use

Such devices are used in automotive applications. Infineon has a full lin=
e,
but they seem a bit hard to get ahold of in small quantities.

Here's one from Freescale (nee Motorola) that's rated for 28V and 5A
at 100=B0 Tc despite the scary small size:

http://www.freescale.com/files/analog/doc/data_sheet/MC33186.pdf

Off the shelf from Digikey for a reasonable price.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rew=
ard"
speff@interlog.com             Info for manufacturers: http://www.trexon.=
com
Embedded software/hardware/analog  Info for designers:  http://www.speff.=
com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZs=
peff



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