75332P MOSFET drain connected to which battery terminal?

"John Doe"

** Not enough info.

Surely you can trace the wiring.

.... Phil

Tab is always drain, but which polarity depends on N or P channel.

Tim

-- Deep Friar: a very philosophical monk. Website:

Fairchild datasheet says: PART NUMBER PACKAGE BRAND HUF75332P3 TO-220AB 75332P

60A, 55V, 0.019 Ohm, N-Channel UltraFET Power MOSFETs

Didn't you take a photo before disconnecting the thing?

Yes, only one way will make any sense. Other way current will flow through the MOSFET diode, out of control.

Grant.

** A well labelled drawing does a better job most times. ** With an N channel MOSFET - it's London to a Brick the drain goes to the motor and the source to the battery negative.

.... Phil

I've never heard that expression, but you are correct. For an NMOS to = work=20 between the battery + and the motor, it would need a gate drive higher = than=20 the battery voltage. It's possible, but unlikely.

But I wonder how they achieve reversal and braking without a full = bridge?

Paul

"P E Schoen"

But I wonder how they achieve reversal

** A switch ?

and braking without a full bridge ?

** Not needed.

AC powered drills have no braking.

... Phil

"Tim Williams"

** Some power MOSFETS have the source on the tab.

In TO3, TO3P, TO220 etc

... Phil

HUFA75332P3 is a 60A 55V N-channel MOSFET.

N-channnel mosfets are used as switches with the drain more positive than the source terminal.

So unless that mosfet is part of an electronic brake, or reverse polarity blocking system that terminal goes to the battery positive.

--
?? 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net

Only RF FETs. Rarely encountered in those packages because the lead inductance really sucks. They occupy that small margin between audio frequency and switching FETs and proper RF FETs with microstrip leads, and usually stud mount heatsinking.

Tim

-- Deep Friar: a very philosophical monk. Website:

"Tim Williams"

** FFS do NOT top post !!!!!!

** Lateral power mosfets, made by Hitachi, Renesas and Magnatec / Semelab / Exicon all have the case or tab as the drain.

Egs 2SK176, BUZ900, BUZ900P, 2SK226 ....

.... Phil

"Phil Allison"

** Corection:

Lateral power mosfets, made by Hitachi, Renesas and Magnatec / Semelab / Exicon all have the case or tab as the SOURCE.

Egs 2SK176, BUZ900, BUZ900P, 2SK226 ....

... Phil

Says the pillar of UseNet...

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"P E Schoen" "Phil Allison"

to the motor and the source to the battery negative.

I've never heard that expression,

** It's mainly an Aussie saying - connected to horse racing.

The odds are " London to a brick on " that a particular horse will win or is about to finish first.

Google it.

... Phil

--
Do you mean that you not only want a wrong answer, but a certain wrong 
answer?
		-- Tobaben

"Chiron"

** Only ignorant pigs top post.

Like you.

.... Phil

I had no trouble finding the data, by simply entering the distinct "75332P" into a search engine. From the little I know about electronics, I could not figure out anything from the data, except that the device is a MOSFET.

No, but I can look inside of another drill.

And which way is that?

So... Somebody who is trying to do homework is chastised. But someone who needs an answer is treated as student who needs to learn. You don't like someone else is teaching him, you want to be the teacher. Sounds like some wannabe mentors aren't getting enough attention these days. I don't want to learn electronics right now, I'm too busy doing something else at the moment. Knowing everything would be nice, but that's what UseNet is for. Just like when one of you needs technical information out of your field.

--












> Other way current will flow through the MOSFET diode, out of
> control. 
> 
> Grant. 
>>
>>
>>....  Phil
>>
> 

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> From: omg grrr.id.au
> Newsgroups: sci.electronics.design
> Subject: Re: 75332P MOSFET drain connected to which battery terminal?
> Date: Sun, 08 Jan 2012 13:21:45 +1100
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Actually, others have posted their best guess of the connection, and = that is=20 what you asked for. As you said, you could open up another drill and = take a=20 look, if that's all you need. Also, don't "bite the hand that feeds = you", as=20 you seem to be doing here. Most people first do a cursory search for the =

information they need and then come here if that doesn't provide the=20 information, or if further discussion is warranted. This IS a design=20 newsgroup, not basics, so you should expect people to discuss the design =

aspects, which apparently you have no interest in.

Too bad if you don't have time to do your own research, or even open = another=20 drill to get exactly what you need, and instead expect us to spend our = time=20 doing the work for you. Many of us charge customers consulting fees for = what=20 we do, especially if it is a commercial venture, which your application = may=20 be. Here is a circuit I found, but the drain is connected to the motor = via a=20 reversing switch, and the source goes to the battery minus terminal:

And even more detail here:

Paul

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