PWM consume high power near 300uA

[khodidas]

Hi,

I am using SDK15.3.0 and s132_nrf52_6.1.1_softdevice.  (nRF52832)

Getting higher current consumption (300uA) while using the PWM library. (https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/pwm_example.html)

Also tried to generate using PPI, But the same result as PWM library.

I wonder when used a low-power PWM library and got 460uA. (https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/low_power_pwm_example.html) 

200uA somewhat expected as per the datasheet, But is there any other way to generate PWM using low power? (<200uA)

Thanks,

Nirav Patel

[Sigurd]

Hi,

 

200uA somewhat expected as per the datasheet

 This is for the PWM peripheral, but as mentioned in the PS, it does not include GPIO, DMA current. I don't think clock current is part of this either. But PWM library and low_power_pwm_example does not use the PWM peripheral.

What PWM frequency and duty cycle do you need ?

[khodidas]

Thanks, Sigurd

1kHz frequency and duty cycle 0 to 100%.

PWM library uses timers so I doubt that it consumes power. (120uA max while using a timer at 16Mhz)

Also used timers while generated PWM using PPI(custom logic). (300uA)

Got the link to the case in which RTC used for PWM. But getting 120uA while using this.

https://devzone.nordicsemi.com/f/nordic-q-a/58091/glitches-when-toggling-pin-with-rtc-ppi-gpiote-and-reading-rtc-s-counter

Is there any other way except above to generate PWM but consumption shouldn't increase more than 20-30uA.