Subject:
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HBridge LMD18200
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 19 Mar 1998 22:25:43 GMT
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Original-From:
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Frangois <moonfish@club-^stopspam^internet.fr>
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Viewed:
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1426 times
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Hello,
First thanks for your answers regarding H-Bridges and especially the
LM18200.
This H-Bridges would be used with 12V DC motors which can sink up to
12Amp each and I have plenty of room to put them.
But there is still something that puzle me :
In the datasheet they said that the LM18200 is rated for 12V to 55V.
Why not from 0V to 55V?. I mean if I want to slow my motor, the power
apllied will have to decrease step by step to 0V.
In my case I want to use the LMD18200 to drive a 12DC with a power suply
evolving between 0 and12V by 0.1V steps.
Thanks/Danke
François
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Message has 1 Reply:
 | | Re: HBridge LMD18200
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| Its a MOSFET based bridge, the Vgs potential needed to put the FETs into full enhancement mode is 11.2v or thereabouts. At lower voltages the FETs operate in their linear range (their Rds value goes up) and they dissipate much more heat. (As Rds (...) (27 years ago, 20-Mar-98, to lugnet.robotics.handyboard)
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