Post by thread:[EE]: DC Motor drives

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? Best regards, Rodrigo

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 line, 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° 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 reward" spam_OUTspeffTakeThisOuTinterlog.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/_W0QQsassZspeff

Spehro Pefhany <.....speffKILLspam@spam@interlog.com> writes: Hi Spehro Thanks for the tip. This one seems to fit quite well, I will try to find a similar one in a DIP package. Rodrigo {Quote hidden}> Such devices are used in automotive applications. Infineon has a full line, > 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° 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 reward" > speffKILLspaminterlog.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/_W0QQsassZspeff > > > > -