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General purpose 12V DC 3A switch

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bryce123

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Hi,

this is my first post here, feeling nervous.

I want to design a PWM switch for general purpose loads, meaning I don't know if it is used with a 12V pump, a fan or LED lights. I want to pack 4 of these as tightly as possible and each has to provide at least 3A.

What would be the best way to go about this?

I have been looking into protected FETs used in the automotive industry, like the ITS724G.
https://www.infineon.com/dgdl/Infineon-ITS724G-DS-v01_01-en.pdf

Do you guys think that the 40V rating is enough to cover "bad motors" (provided the right diode is used)?

Thanks!
 

Consider that these "intelligent switches" are performing slow switching to reduce EMI, so pwm frequencies should be moderate, e.g. a few 100 Hz up to 1 kHz. And there should be a freewheeling means for inductive loads.
 

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