Hi jmelson !
I am making my own cape.
I have found one PWM controller (TLC59116) from
TI http://www.ti.com/lit/ds/symlink/tlc59116.pdf
but it says individual channels are adjustable but with a fixed frequency
of 97 khz. Would that be enough or adjustable frequency is a must feature
for BLDC motor.
Datasheet quote:
*Each LED output has its own 8-bit resolution (256 steps) fixed-frequency
individual PWM controller that operates at 97 kHz, with a duty cycle that
is adjustable*
*from 0% to 99.6%*
Please suggest one.
On Tuesday, 17 June 2014 02:10:35 UTC+5:30, jmelson wrote:
>
>
>
> On Friday, June 13, 2014 10:15:33 AM UTC-5, David Anders wrote:
>>
>> The PWM Cape provides 32 channels of PWM output, addressed over an I2C
>> interface. The three pin connectors are wired in a standard servo pinout,
>> and power to the connectors can be provided from a screw terminal block on
>> the end of the board.
>>
>> the PWM Cape from Circuitco allows you to add 32 PWM channels to the
>> beaglebone black:
>>
>> http://elinux.org/CircuitCo:PWM_Cape
>> http://boardzoo.com/index.php/beaglebone-black/pwm-cape.html
>>
>> These appear to be for radio control servos, and would be generating PWM
> at a pretty low frequency, like 50 Hz. For running a brushless servo motor,
> it probably takes PWM at tens of KHz at a minimum. I have some doubts
> this cape would be suitable for the OP's use.
>
> Jon
>
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