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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9488

Posted: 09:51pm 10 Jun 2014

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Hi-de-hi.

I am looking at using an H-Bridge for forward/reverse motor control, but have found that there are dedicated H-Bridge chips that do all this for me, along with PWM support.

I am currently looking at the BD6221 driver IC, which has the H-bridge, back-EMF diodes and other features like motor braking all incorporated into the one SOIC8 chip for $5 or so.

Does anyone else have any suggestions for doing this? Perhaps a better IC then that linked to above? I do very much like the idea of using a nice compact SOIC that does all the work, over discrete transistors and diodes, which would take up much more PCB space...

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centrex

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Joined: 13/11/2011
Location: Australia
Posts: 320

Posted: 10:36pm 10 Jun 2014

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Hi Grogster
Have you thought about some of the already built motor modules like the 50amp dual motor controller from elechouse or the bts7960 modules from eBay or aliexpress, they are cheap and ready to roll.
Regards
Cliff

Cliff

Grogster

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Posted: 10:50pm 10 Jun 2014

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Never heard of either of those - will search for them - now that I have some references.....

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Grogster

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Posted: 12:46am 11 Jun 2014

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bts7960 seems to be more a stepper-motor driver, according to the descriptions on eBay.

Just for clarification, I am NOT wanting a stepper-motor driver, I need a DC motor driver, with full PWM control from zero RPM, to full RPM via PWM.

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viscomjim
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Joined: 08/01/2014
Location: United States
Posts: 925

Posted: 01:03am 11 Jun 2014

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try pololu. they carry some nice stuff in this department.

Bill.b

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Joined: 25/06/2011
Location: Australia
Posts: 232

Posted: 01:36am 11 Jun 2014

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Hi Grogster

What is the current and voltage of the motor you want to control?

Bill

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Grogster

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Posted: 01:36am 11 Jun 2014

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Nothing much - 500mA MAX @ 12v DC.

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Bill.b

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Joined: 25/06/2011
Location: Australia
Posts: 232

Posted: 01:46am 11 Jun 2014

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These modules from DX.com will drive two motors up to 2A.

The description is fro stepper motors but they drive two independent motors.

Connect the PWM to the EN inputs.

http://www.dx.com/p/l298n-dual-h-bridge-dc-motor-driver-for- robot-smart-car-green-154444#.U5hBQ7mKBhE

Bill

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Grogster

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Posted: 01:19pm 11 Jun 2014

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Thanks, Bill - they look like likely candidates - will check them out.

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