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16-Channel 12-bit PWM/Servo Driver Max Current
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16-Channel 12-bit PWM/Servo Driver Max Current

by winstonc on Sun Sep 02, 2012 7:26 pm

What is the maximum amount of current that can be driven on each output? I am assuming that the power to each servo doesn't come through the IC, but want to make sure. I don't want overload the PCB, or burn out the chip. If needed, I will combine PWM from this board with power on a separate board. Also, what size capacitor is recommended on the V+ line? I am planning on driving three servos that use about 600ma each. Thanks!

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Re: 16-Channel 12-bit PWM/Servo Driver Max Current

by adafruit on Sun Sep 02, 2012 9:56 pm

you'll have to experiment with the capacitor, 470-1000uF is not a bad place to start
the power pass FET can handle about 5A from what we recall.

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Re: 16-Channel 12-bit PWM/Servo Driver Max Current

by winstonc on Mon Sep 03, 2012 4:02 am

Thank you for the starting values!

And just want to re-phrase my first question - is it correct that the power to each servo doesn't come through the driver IC? The power pins are directly connected to the power input to the board? Without a circuit diagram, it is hard to follow the traces on the actual board.

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Re: 16-Channel 12-bit PWM/Servo Driver Max Current

by adafruit_support_bill on Mon Sep 03, 2012 6:41 am

That is correct. The V+ does not go through the driver chip. Full schematics and layout files can be found here: https://github.com/adafruit/Adafruit-16-Channel-PWM-Servo-Driver-PCB

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Please be positive and constructive with your questions and comments.