F
[email protected]
- Jan 1, 1970
- 0
Hi all,
I have to determine the power consumption on a device in different
states. I would like to have your inputs about the procedure I have
thought:
- Hardcoded the device in a specific mode
- Measure the voltage drop (Vdrop) across a series resistance (Rtest)
at batteries output (1.0 or 0.1 Ohm, I'm not sure what is best ???) (Do
I must considered cable resistance used to measure??? N.B. I use a
HP3456A 6 1/2 digits voltmeters)
- Knowing the batterie voltage (Vbatt), the power drain from batteries
is Pstate = Vbatt * Vdrop / Rtest
- Since I use a boost converter to raise the 1.5V from the 2 AA
batteries to 3V (voltage at which all the device components works), the
current drain by these components is approximatly 2 times less (if I
forget the switcher efficiency)?
Don't hesitate if you see major problem and/or have different methode
to propose!
Thanks in advance for all your input!
Fred
I have to determine the power consumption on a device in different
states. I would like to have your inputs about the procedure I have
thought:
- Hardcoded the device in a specific mode
- Measure the voltage drop (Vdrop) across a series resistance (Rtest)
at batteries output (1.0 or 0.1 Ohm, I'm not sure what is best ???) (Do
I must considered cable resistance used to measure??? N.B. I use a
HP3456A 6 1/2 digits voltmeters)
- Knowing the batterie voltage (Vbatt), the power drain from batteries
is Pstate = Vbatt * Vdrop / Rtest
- Since I use a boost converter to raise the 1.5V from the 2 AA
batteries to 3V (voltage at which all the device components works), the
current drain by these components is approximatly 2 times less (if I
forget the switcher efficiency)?
Don't hesitate if you see major problem and/or have different methode
to propose!
Thanks in advance for all your input!
Fred