Post by thread:[EE]: Bi-directional solenoid driver chip wanted

Hi, I'm looking for a multiple bi-directional (polarity) solenoid driver chip. I need to drive up to 12V and ~1A and I have 5 solenoids to drive, but only need to pulse one solenoid at a time. Rohm seem to have designed some suitable 2 channel motor drive chips such as the BA6238AN, but no-one seems to have any stock. Can anyone suggest a suitable device? John ----------------------------------------------- John Lawton Electronics Custom Electronics Design & Development spam_OUTdesignTakeThisOuTjle.co.uk http://www.jle.co.uk ----------------------------------------------- -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

In a message dated 10/15/2002 13:12:02 Eastern Daylight Time, .....designKILLspam@spam@JLE.CO.UK writes: > I'm looking for a multiple bi-directional (polarity) solenoid driver > chip. I need to drive up to 12V and ~1A and I have 5 solenoids to drive, > but only need to pulse one solenoid at a time. > > John, are you actually drawing 1 amp per solenoid ? Sid Weaver W4EKQ Port Richey, FL -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

At 18:15 15/10/02, Sid wrote: >John, are you actually drawing 1 amp per solenoid ? Max solenoid current could be around 1A, but can't be exact about this. I only need to pulse a single solenoid at a time for around 100ms, every few seconds. John ----------------------------------------------- John Lawton Electronics Custom Electronics Design & Development designKILLspamjle.co.uk http://www.jle.co.uk ----------------------------------------------- -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

In a message dated 10/15/2002 13:52:42 Eastern Daylight Time, .....designKILLspam.....JLE.CO.UK writes: > Max solenoid current could be around 1A, but can't be exact about this. I > only need to pulse a single solenoid at a time for around 100ms, every few > seconds. > John, take a look at the ULN2003 Darlington array. It will sink 500ma continuously. Check the data sheet - it might take 1 amp for very short periods. It has a built in flyback diode to protect the chip. Sid -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

At 19:29 15/10/02, Sid wrote: >John, take a look at the ULN2003 Darlington array. It will sink 500ma >continuously. Check the data sheet - it might take 1 amp for very short >periods. It has a built in flyback diode to protect the chip. Thanks, that's fine for a unipolar drive, but I need bi-polar, such as offered by a bridge driver. I'm just fishing for suggestions of a device that is actually available, not vapourware like the Rohm stuff. John ----------------------------------------------- John Lawton Electronics Custom Electronics Design & Development EraseMEdesignspam_OUTTakeThisOuTjle.co.uk http://www.jle.co.uk ----------------------------------------------- -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

John, How about the good old L293D dual bridge driver? - Tom Scarince THS Engineering http://www.thsengineering.com > Thanks, that's fine for a unipolar drive, but I need bi-polar, such as > offered by a bridge driver. I'm just fishing for suggestions of a device > that is actually available, not vapourware like the Rohm stuff. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

On Tue, 15 Oct 2002, John Lawton Electronics wrote: *>At 19:29 15/10/02, Sid wrote: *> *>>John, take a look at the ULN2003 Darlington array. It will sink 500ma *>>continuously. Check the data sheet - it might take 1 amp for very short *>>periods. It has a built in flyback diode to protect the chip. *> *>Thanks, that's fine for a unipolar drive, but I need bi-polar, such as *>offered by a bridge driver. I'm just fishing for suggestions of a device *>that is actually available, not vapourware like the Rohm stuff. Maybe try the old M54543. Drives one motor or two solenoids, 3A. Try to get it as a spare part. It is used in some VCRs I think. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

>Thanks, that's fine for a unipolar drive, but I need bi-polar, such as >offered by a bridge driver. I'm just fishing for suggestions of a device >that is actually available, not vapourware like the Rohm stuff. Then take a look at the ST web site. They have a number of driver chips designed to bipolar drive stepper motors and brushless DC motors. Chips like the L293 (IIRC) and L6203 may be the sort of devices you want, but they do have a range of chips (and application notes) available. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.