hello,
im a new user to the LPC51u68, and using the LPCxpresso51u68 board.
im made a code to measure the current consumption in both deep sleep mode and in active mode with all the peripherals that would run by my application.
before measuring the current consumption, i removed JS17, JS10 and R72 before mesauring the current.
i connected my current meter between the pins of JP6. all as mentioned in the Xpresso board manual.
i even disconnected R72 and connected JP3.
im using a keysight DMM 34461A for the current measurement.
i tried running both my application and the Utick_wakeup example, all measurements in both applications show me a current consumption of 3.9mA at deep sleep mode.
active mode show current consumption of about 7mA.
what am i missing or doing wrong?
the datasheet shows that the current should in the lower uA area.
thank you
omer
Hello omer,
How about the power_manager project under SDK ?
...\boards\lpcxpresso51u68\demo_apps\power_manager_lpc
BR
Alice
same.
checked also deep sleep mode in power_manager project under SDK, and it shows current of 3.4ma.
as a next step we even took out the U14 current measure unit, but nothing changed.
any ideas?
omer.
Hello omer,
I using the LPCxpresso51u68 board, just remove JS10, connect current meter to JP6,
run the SDK demo "lpcxpresso51u68_power_manager_lpc", enter deep sleep mode,
the current is 646uA.
Have a great day,
TIC
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as you can see - thats what i did (even checked for short after).
further more - i took out U14.
also - the datasheet says current consumption max is 182uA in deep sleep mode (page 47 table 17) , where your check shows about 3.5 times that much.
tryied it with another LPCxpresso51u68 board i have. there the mesaure shows 20mA
only took out JS10 and JS17 there, and conected JP6 to current meter
omer
Hello omer,
If want to measure data like datasheet, we need to disable all clocks of all module.
BR
Alice