ST25DV04K current consumption in low power mode.

[MFo.1]

Hello,

i'm using NFC04A1 board to test the ST25DV04 module. I want to reduce current consumption as much as possible.

So i powered up only the nfctag board and connected the ampmeter. My Vcc is equal to 1.8V.

i measured about 140uA in normal mode, when i connected the LPD pin to the Vcc, ampmeter shows about 90uA.

Before this i removed R13 (1kOhm) from the board to avoid the current leaking through this resistor.

According to documentation current consumption should fall below 1uA when module is in LPD mode. Are there any special requirements to get this level of current?

Could anyone tell me why my current consumption is so big? Or how to reduce it more?

Regards,

mf

[Denis ROMAN · Accepted solution]

Hello,

Please, remove R7 on top of R13.

R7 is a hook for open-drain version of ST25DV.

Have a nice day

[MFo.1]

Hi Denis,

It helped! Thanks!

Regards,

mf