Author Topic: What is a good heat dissipation solution for stepper motor driver?  (Read 2237 times)

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Offline gcardinalTopic starter

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Good day,

I'm currently working on PCB where I will mount 4 x Pololu DRV8825 / A4988 stepper motor drivers.

Standard height 2.54mm pitch female header on PCB and A4988 plugged into it. Those chipo stepper motor drivers do produce quite a lot of heat.
Driver it self has exposed solderable ground pad with vials to help it dissipate its heat.

Im looking for a solution to aid in heat dissipation from those drivers on my PCB. I have considered a few options:
1. Cut out underneath the driver board - since my PCB will be mounted 2cm above the case I think it can aid in air circulation.
2. Go for the same solution as on the driver board it self - go nuts with vials.  :-/O

Any tips and trick would be highly appreciated.
« Last Edit: April 30, 2014, 07:41:20 am by gcardinal »
 

Offline peter.mitchell

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Re: What is a good heat dissipation solution for stepper motor driver?
« Reply #1 on: May 01, 2014, 02:29:53 pm »
thermally conductive epoxy + small heatsink.
 

Offline SeanB

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Re: What is a good heat dissipation solution for stepper motor driver?
« Reply #2 on: May 01, 2014, 03:15:56 pm »
Thermopad about 5mm thick covering the whole back of the board ( trim pins so they do not project above surface) and a flat heatsink used to keep the pad about half compressed and holding the COB unit to the main board. You probably could get by with a flat bar across the whole row and a screw at each end if it is about 10mm thick.
 


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