Need guidance with DC motor controller - PWM & H-Bridge

[rfetech]

After re-reading some of my search results, I believe that I can modify the code that I found from HankMcSpank...

http://www.picbasic.co.uk/forum/show...highlight=HPWM

This will allow me to read a POT and convert that into a PWM output. I should be able to do this with a 12F683 as I only need one channel. If so, then I now need to decide on a IC or discrete components. I am favoring an IC, forgot the part number without re-searching, that only requires one pin for directional control.

Still would appreciate any input.

Mitch

[aratti]

You could use one BD6220 3 to 36 volts @ 2 Amps with PWM capability.

See the attached Pdf.

Cheers

Al.

[rmteo]

Per your data sheet, the BD6220 is good to 18V @ 0.5A.

[aratti]

I was referring to the BD62xx series. BD6232 is 36 Volts Max 2 Amps. But you have a choice from 0.5 to 2 Amps


Al.

[rfetech]

If I understand the data sheet correctly, the BD622x and BD623x series have a minimum frequency requirement of 20kHz. That would rule out using the PIC internal oscillator, would it not? It also appears that the IC's require 2 channels of PWM for control. If that is true, then the PIC12F683 would not qualify, I suppose.

The LMD18200 would be great, and it only requires 1 PWM input, except that the cost is more than I want to put into this project - ~$12.00. The BD6232 is less than half the cost of the LMD18200 at ~$5.00.

So far, I'm leaning towards the popular L298N. It cost about $2.50 and requires just the 1 PWM input and no limitations on the frequency so I could use the 12F683 with internal osc.

Of course, I may be missing some things so please let me know if that is true.

Mitch