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Can someone explain the difference between an H-Bridge and the SN754410 chip? — Parallax Forums

Can someone explain the difference between an H-Bridge and the SN754410 chip?

Roy El-RayesRoy El-Rayes Posts: 7
edited 2008-07-20 15:51 in General Discussion
Sorry if that question is stupid, I'm new to this whole robotics/electronics thing. I've been a programmer for a while, so my biggest hurdle is learning how all of these things play together.

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-07-18 16:03
    Linking a datasheet to the SN754410 would make it easier to provide and answer.

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  • FranklinFranklin Posts: 4,747
    edited 2008-07-18 16:16
    The chip is a quadruple half-h bridge so it would seem. What is your specific question?

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  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2008-07-18 16:23
    I suspect that he wants to know what to use which for.

    In sum, there are a lot of applications that find low power half and full H-bridges useful. In that context, the IC is great.

    But if you really want to control a hefty DC motor, discrete components allow for dumping heat build up within the final stage. There are digital ways around this with MOSfets and PWM, but sometimes discrete components just can really handle more power.

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  • Roy El-RayesRoy El-Rayes Posts: 7
    edited 2008-07-18 17:50
    Sorry Chris, new at this.

    http://focus.ti.com/docs/prod/folders/print/sn754410.html

    Thanks for the answer Kramer. So the H-Bridge would be better in high load applications because it could dissipate heat easier?
  • Mike GreenMike Green Posts: 23,101
    edited 2008-07-18 20:00
    The SN754410 is normally used as an H-bridge. It can be used in other configurations as well. What Kramer was saying is that you can built an H-bridge from discrete transistors and these can be gotten in much higher current and voltage capacities as integrated devices like the SN754410.
  • Roy El-RayesRoy El-Rayes Posts: 7
    edited 2008-07-18 20:27
    Cool, thanks for all the info.
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2008-07-20 15:51
    In other words....
    Two half H-bridges can be used to make a complete H-bridge.
    Half H bridges can nicely control a stepper motor that requires the coils to be sequenced.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    It's sunny and warm here. It is always sunny and warm here.... (unless a typhoon blows through).

    Tropically, G. Herzog [noparse][[/noparse] 黃鶴 ] in Taiwan
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