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Piggy backing Driver Chips?

YT2095

I`m in the building stage of a Robot, and am currently going through my box of assorted stepper motors and hooking them up to circuit I`v built and writen the driver s/ware for.

I`m using the SN754410NESN754410NE dual H-Bridge as the driver.

I have (or rather Had) 10 of them this morning, and have catalogued a good 50% of my motors so far in terms of wiring sequence, there motors range in Current and voltage.

I blew a chip this morning, seems it didn`t like 24v without current protection! LOL

anyway, I have some 1.4A motors and wondered if it`s possible to piggy-back these chips to effectively double the current capacity to 2 Amps?

It won`t be a Physical piggy-back, just simply the pins all connected 1 for 1 on a seperate area of board real estate, each chip with it`s own heatsink.

 

I can`t see any Technical reason why this shouldn`t be possible, it`s a Digital signal fed in and at a relatively low frequency.

 

so if any amongst you have any reason Why these 2 chips shouldn`t be married this way, speak now or forever hold your peace! image

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  • I think you would have better luck adding a FET or power transister to the output to drive that much current.

    Putting the two chips together as you suggest will probably not work.  If there is any difference (highly likely) between the two chips, one will trigger before the other.  So in a matter of femtoseconds, one will blow out followed by the other.

     

    Nice try, but silicon if funny that way.  Besides, you should know how to set up a power driver for the motors or get a chip with a higher current rating.

     

    Just my opinion,

     

    DAB

  • in reply to DAB

    Totally agree with the fet.  Efficient and safe.

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