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DMHC3025LSD H-Bridge Question
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Topic: DMHC3025LSD H-Bridge Question (Read 787 times)
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mribble
Regular Contributor
Posts: 202
DMHC3025LSD H-Bridge Question
«
on:
July 31, 2018, 08:17:09 pm »
I thought I understood h-bridge chips, but evidently I'm missing something with this chip so I need some help. Here is the datasheet for the chip I'm using (it's just 2 pmosfets and 2 nmosfets):
https://www.mouser.com/datasheet/2/115/DMHC3025LSD-218720.pdf
I'm powering this chip with 12V. Then to the 4 inputs on the hbridge I'm passing in P1G=0V, N1G=12V, P2G=0V, N2G=12V. The P pins are pmosfets. The N pins are nmosfets. So I thought this would effectively turn off all 4 mosfets, but I'm seeing an internal short in the chip.
Can someone gently explain what I'm misunderstanding?
Thanks in advance for the help!
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voltsandjolts
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Re: DMHC3025LSD H-Bridge Question
«
Reply #1 on:
July 31, 2018, 09:38:48 pm »
In simple terms for this device, the N-type mosfet is on when the gate is positive, the P-type is on when gate is at ground.
I think you got N and P mixed up.
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mribble
Regular Contributor
Posts: 202
Re: DMHC3025LSD H-Bridge Question
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Reply #2 on:
August 01, 2018, 03:49:05 pm »
You are correct. That was my mistake. Thanks!
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