Hi, I am trying to calculate the current consumption for my BL072z board
1.- my formula:
16mA in run mode
30uA in stop mode
T to tx data = 20 secs
Number of txs in a hour = 3600/20 = 180
duration of each tx = 3 seconds
total TX time = 3(180)=540 seconds = 0.15 hours
time in sleep mode = 0.85 hours
Total current consumption = 0.15(16mA) + 0.85(30uA) = 2.43mA
Battery = 1000mAh
Capacity is automatically derated by 15% to account for some self discharge so:
Battery = 850mAh
battery life = 850mAh/2.43mA = 349.79 hours = 14.57 days
2.- formula from website
is the same result
3.- ST formula
page 9:
IDD = ( T1*IDD sleep / T ) + ( T2*IDD run / T )
T1 = 20 seconds
IDD sleep = 30uA
T2 = 3 seconds
IDD run = 16mA
T = 40 seconds
IDD = 1.215mA
the ST formula gives me a value very different, does anyone knows why?
thanks
