Tronic's DIY dual Mosfet H-bridge (DSMhb)

The IRFZ44N is still a regular transistor, in this case makes no difference to use the IRF44 or the IRF44N.

The IRLZ44N is the logic level mosfet Thanos is referring to. Notice the L for logic (5V) instead of the F.

What is the correct one?
IRLZ44N or IRFZ44N?
King regards!

The original one is the IRFZ44N, which is a mistake in that circuit. You will need logic level mosfets on the low side and replace the IRFZ44N with IRLZ44N, which is logic level.

Are there many changes to the original design not posted in the first page?
I mean other than the irfl44n ones...
I'm going crazy with my AMC and H-Bridge.
King regards.

You are not the first, nor the last one. Welcome the world of DIY.

Change the mosfets, everything else should be fine.

Hi everyone,
i have question about the Mosfets. I already read, that i have to use the IRLZ44N instead of the IRFZ ones, but it seems that every german shop (online and offline ) ran out of them. I already checked for alternatives and found the IRLZ 34N. The only difference seems to be the drain current, which is only 21 ampere instead of 41. Will it work? (I think the max current isnt going to be a problem, because I dont want to use the bridge to run the wipermotors)

Another one i found was the IRLZ 44ZPBF but i couldnt find a datasheet and therefore more details about it... found it here: https://www.distrelec.com/ishopWebF...1&node=DC-71275&artView=true&productNr=605380

Which one would you recommend, or should i use something complete different one.
All the other parts are already delivered, just these FETs are missing, and they're arent going in stock til august. I cant wait that long

Hope someone can help!

greets

Bene

Any logic level MOSFET will work, as long as the specs meet your needs. If you don't need 50A continuous then you can use lower current ones.
The IRLZ 44Z PBF is going to be perfectly fine (it is pretty much the same as the IRLZ 44N) and the IRLZ 34N as well. Make sure the 3 legs match the connections to the circuit, other than that you don't have to worry about too much.

I've just completed the H-Bridge and have some questions. My AMC is working fine and I can control it from the Xsim-software.

Just for testing I have a 3V DC-motor and a 3V power source(2 batteries). Is this enough to see if it runs? The cable between the AMC and the H-Bridge is connected. I have tried to run it but nothing happens, no leds are lit at all... :?

Why didn't you try if the led's light up with 12V?

Due to the lack of a 12 Volt power source... I try to find something more powerful tomorrow! :bulboff:

The question still remains, is 3 Volt enough to power thew H-bridge just for testing? What's the minimum voltage for the H-bridge?

3V is not enough. In order for the P-ch mosfets to operate properly you need at least 10V. Anything below that will be inefficient and cause more heat.

I hope you are using logic level mosfets for the low side! If you don't know what I am talking about, please read after it instead of asking because it has been discussed about 10 times, only on this forum even in this very same topic on the prev. pages.

Ah, thanks! I'm using IRLZ44N mosfets instead of the IRFZ44N mosfets. Sometimes it's alot faster to ask then search and read hundreds of pages! Next time I will read alot before asking... :Einstein:

I have tested the H-bridge with a 12 volt power source, a power window motor and 5A fuse, it works without any problem at all! :clap:

Hi guys, i have some dudes...someone can place a list of components what is definitive for the moment because i wnt buy its. and that works. thanks

hallllooo

Hi guys, i have some dudes...someone can place a list of components what is definitive for the moment because i wnt buy its. and that works. thanks

Hi all!

Tronic, i would like to reproduce your h-bridge and PWM modules. I' trying do make an rotation sim with car starter motors who have great current peaks. I would like to know if you have this h-bridge board sprint reinforced to send me. I want to make it with the silkscreen method, so i need the negative sprint layout for the h-bridge and the pwm module. So, the sprints must be white so the light can sensibilise it.

Thanks for the help.


Jefferson Masutti

Hi thano

I have a problem : I have used the H-bridge with 12V (60W) wiper motors and All is OK !
I have changed wiper motors : 24V (120W) and I naturally have changed my power supply : i use S-350-24V : the output of the motor is about 0 Volt and when I move the slide of xsim the voltange is ever abot 0 volt.
I have tried to power with 12V and 12V wiper motor and All is OK!!
Perhaps I must change something in H-bridge circuit ?

regards tetesim!

I think I have killed my h-bridge, and instead of a lot of troubleshooting i consider building a complete new one as i have a pcb for it. I can get most of the parts from futurelec, but they dont have 100uf 65v capasitors. Can i use 100uf 100v? I can get all the other parts there. The resistors: They have 150ohm (partlist says 160) and 3,3kohm (list says 3.6) Is it close enough or must I add another in series to make right value. I can get the complete lisf from tex digikey, but that is twice the price!

Fred

You can use all those parts you listed.

I`m on to building Thanos`s boards finally
Collected all the data, created the part lists (everything is available locally for around 50 euros which is fairly cheap - AMC parts and LCD included), read all the posts again, and I have just one question:
When I look at DSMhb pcb in opening post, I see that one side of schottky diodes (ones marked with D on pcb) are not connected at all.
I don`t say that this is an error, but would like to know why it`s like that?
If I didn`t saw it correctly, please point out where to connect the other end.

Thanks in advance, and hope to post my progress shortly

EDIT: Sorry for asking obvious, I carefully checked the board and I can see the connection :yes: