A logic gate chip with 1 ea XOR and 2 ea AND gates?


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  1. #1
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    Question Comparison of L293D and DB6221

    Quote Originally Posted by bogdan View Post
    ..the clamp diodes are missing...

    I think is easy with L293D (internal clamp diodes)...if you combine the channels you have Peak Output Current=1.2A (check the specs of the solenoid)
    ]
    Granted I forgot the external clamp diodes, but I can't see why you think using the L293D is an advantage over the Rohm BD62x1. Here are compairsons that appear to favor the BD62x1:

    Operating range: BD62x1 will run with Vss 3 to 36 v; L293D is 4.5 to 36. This is important to me since my board supply is 3.95 vdc (3 ea AA NiMH batteries);

    Quantity 1 price at Mouser: BD62x1 = $1.50; L293D = $5.12....even adding the 4 ea clamp diiodes (1N4001??) BD62x1 approach is a lot cheaper;

    Low Stanby current: BD62x1 has standby mode = 10 microAmps; L293D has quiescent current total (Vss + Vx) of at least 18 milliAmps dey pending on logic setting.....this is too high for battery operation.

    Based on above comparison I wouldl really appreciate your opinon as to why the L293D is preferable. ???

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    Default Looks like BD622x chip also has internal clamp diodes

    Quote Originally Posted by jellis00 View Post
    Granted I forgot the external clamp diodes, but I can't see why you think using the L293D is an advantage over the Rohm BD62x1. Here are compairsons that appear to favor the BD62x1:

    ???
    Taking a closer look at the Rohm data sheets for their BD622x chips, it appears they also have internal clamp diodes, making it a further advantage for the BD622x1 over the L293D. The chip diagram from data sheet is in the attached image. Am I mis-interpreting this image??
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    Default

    Sorry for the delay, my ISP is sooooo lame!
    Lots of HBridge chips out there, allegro makes a bunch of them, It trumps relays due to cost, reliability, size and they look better too even discrete transistors are still cheaper, smaller, and more reliable, though mosfets might be better than junction types.
    If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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