Exploring LMD18200 3A H-Bridge

RE: Exploring LMD18200 3A H-Bridge

COMPACT — Thu, 20 Feb 2020 21:14:09 GMT

The LMD18200T can be expensive!

RE: Exploring LMD18200 3A H-Bridge

dougw — Thu, 20 Feb 2020 04:53:50 GMT

These chips are very useful. Here is a tip on soldering to the pins....

These chips fit on a standard .1 " pitch strip board if you mount them at 45 degrees:

[View:/resized-image/__size/620x219/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-77645f92-39d2-4698-a19e-fc45638a89e6/1512.contentimage_5F00_180527.jpg:620:219]

Of course you have to cut tracks between pins on the same track as usual for strip board, but you can make very neatly wired circuits with strip board.

RE: Exploring LMD18200 3A H-Bridge

COMPACT — Thu, 20 Feb 2020 01:13:37 GMT

A nice post John!

The LMD18200 is used a lot for DCC model railway controllers.

Cheers

Very

RE: Exploring LMD18200 3A H-Bridge

e14 Contributor — Wed, 27 Apr 2016 13:28:29 GMT

Hi, guys

this was a useful demonstration for using LMD18200 motor driver IC in locked anti-phase mode. i am trying to do the same for my project in which I'm using same LMD18200 to drive a solenoid controlled by PWM. As a test, I connected DC motor to LMD18200 to see if its working right. But even though circuit is same, DC motor doesn't appear to change directions above and below 50% duty cycle nor does it stops at 50%.

The results i am getting is that, at low duty cycle(below 50%) the supply to the motor decreases by a small amount and at duty cycle greater than 50%, it drives with full power, all in the same direction

Pin connection of my circuit:

PIN 1(bootstrap): connected to PIN 2 through a capacitor of 10nF

PIN 2(output 1): connected to one teminal of dc motor

PIN 3(direction): PWM signal

PIN 4(brake): ground

PIN 5(PWM): high (5V)

PIN 6(Vs supply): +16V

PIN 7(ground): ground

PIN 8(current sense): ground

PIN 9(thermal flag): connected to +5V through a LED and resistor(1K)

PIN 10(output 2): connected to another terminal of dc motor

PIN 11(bootstrap): connected to PIN 10 through a capacitor of 10nF

refer to this image

any help appreciated, thank you

http://imgur.com/uMEYrPj

RE: Exploring LMD18200 3A H-Bridge

e14 Contributor — Sat, 06 Feb 2016 21:12:05 GMT

Hi guys

It's worked with 12V on Vs.

Many thanks all

RE: Exploring LMD18200 3A H-Bridge

e14 Contributor — Thu, 04 Feb 2016 13:32:35 GMT

Ok. I read many time the data sheet of h-bridge and I can't understand how the output of LMD18200 (pin 2 and 10) is depending on Vs (pin 6) - power supply and on what values. I can't find a graphic or something to understand.

Could you guide me on this to understand this step please? I googled and I did not find any basic information about that. This it may sound crazy for all of you guys, but for me, a beginner in electronics, it's important.

Many thanks in advance.

RE: Exploring LMD18200 3A H-Bridge

e14 Contributor — Thu, 04 Feb 2016 11:41:49 GMT

Thank you John and Shabaz a lot for suggestions.

I'll try to buy a 12V DC Motor and try with 8x1.5 series batteries AAA.

I'll get back with a feedback as soon as possible.

RE: Exploring LMD18200 3A H-Bridge

e14 Contributor — Thu, 04 Feb 2016 09:05:33 GMT

Hi John

Nice tutorial.

I bought recently some components for learning.

I have a problem powering up a motor using:

DM164137 DEV KIT,

MM10 DC Motor 3V

LMD18200T/NOPB

and 2x1.5V battery

Please tel me if I supply 3V to pin 6 at h-bridge and signal from the curiosity pin RA0, why the motor(connected via 10ohm resistance to pin 2 and 10) is not powering up?

I'm using MPLAB IDE just like in this tutorial.

It's matter that I'm using a 3V motor and the LMD need 12V power supply?

I'm new in this and I'm trying to learn. It would be nice if you could make a very simple tutorial only with just turning on/of a motor.

I appreciate allot if you could guide me.

RE: Exploring LMD18200 3A H-Bridge

clem57 — Sun, 03 Jan 2016 04:29:33 GMT

Good tutorial John Wiltrout [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-77645f92-39d2-4698-a19e-fc45638a89e6/contentimage_5F00_930.png:16:16]

Thanks,

Clem

RE: Exploring LMD18200 3A H-Bridge

Jan Cumps — Sat, 02 Jan 2016 23:54:39 GMT

When I have to save the part but not the board, I use my diagonal pliers to cut away the PCB.

If you find yourself saving through-hole parts often, something like this may be useful:

[View:https://www.youtube.com/watch?v=Ft50m8UU5WQ:520:333]

RE: Exploring LMD18200 3A H-Bridge

DAB — Sat, 02 Jan 2016 20:35:05 GMT

Great post John.

I was worried about your soldering on the pins. Next time you might want to put some shrink tubing around them, especially if you plan to take it up to 55 volts or so.

DAB

RE: Exploring LMD18200 3A H-Bridge

shabaz — Sat, 02 Jan 2016 16:35:44 GMT

Hi [mention:f80b53cee57c44bc9d7c577d07d7c791:e9ed411860ed4f2ba0265705b8793d05],

Nice demo!! That is an incredibly useful test board/tool (PWM test jig), I had missed that before. Pulse generation is super useful for so many tests.

Oh and the spiral kind-of had this effect ; )

[View:/resized-image/__size/351x200/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-77645f92-39d2-4698-a19e-fc45638a89e6/contentimage_5F00_180526.jpg:351:200]

RE: Exploring LMD18200 3A H-Bridge

mcb1 — Sat, 02 Jan 2016 09:57:13 GMT

Building with electronics is similar to building with Legos.

Exactly right.

Too many people look at the whole thing and become overwhelmed.

Mark