Timer interruption and pwm power consumption

[Nasib]

Does anybody know the relationship between the frequency of an interrupt timer/a pwm signal and the power consumption? 

Thanks a lot 

[haakonsh]

There are too many variables to give you any accurate numbers, you're gonna have to actually measure it. 

Variables:

1. VDD
2. Load impedance
3. GPIO drive strength
4. Frequency
5. Temperature
6. PWM driver implementation
7. The state of the MCU at any given point in time. 

[Nasib]

what i meant is : can i reduce the power consumption reducing the frequency of a pwm ? 

and: 

1)  i am using the pwm to create a breathing feeling in a couple of LEDs. Which is the correct frequency for that ? ( because i am using randomply 1Khz) 

Thanks 

[haakonsh]

Nasib said:

can i reduce the power consumption reducing the frequency of a pwm ? 

 You can reduce some of the current consumption by reducing the frequency of the PWM, but again it depends on the load impedance. 
 

Nasib said:

i am using the pwm to create a breathing feeling in a couple of LEDs. Which is the correct frequency for that ? ( because i am using randomply 1Khz) 

 It depends, there's no one frequency that is best for all use-cases. I suggest you ask the manufacturer of your LED's.