nRF52832 : PWM Driver Clock lower then 125kHz

[dustinface]

Hey,

just wondering if its possible to lower the pwm driver clock of the nRF52832 to around 500Hz? Im working on a LED dimming application and the LED spots i use have really bad on/off times. Im getting much noise on the VCC which ends in a CPU reset when i dimm the spots to a lower value then 20% off time. So i tried it with the PWM Library with a lower pwm clock and it worked better then.

Now i need to know if its somehow possible to set the clock for the pwm driver lower then 125kHz. I looked in the datasheet but it seems like its not possible to set the clock directly to a lower freq. But maybe there is any other option to decrease the clock?

Thanks!

[Dave_couling]

At this frequency it makes for sense power efficiency-wise to use app_timers or pwm_low_power

[Sigurd]

Hi,

It should not be any problem to set the PWM frequency to either 125 kHz or 500Hz. Are you using the PWM driver or the PWM library? Since you are using nRF52832 I would recommend using the PWM driver.