How long does nRF52832 work normally when using button cell powering for nRF52832 ?

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

AmbystomaLabs — Wed, 14 Nov 2018 14:04:39 GMT

You should not do that. If you design for that you will substantially reduce the battery life. You have to design for max 1mA. Even that will reduce the battery life. Nominal life is achieved with 0.4mA max.

See the datasheet: http://data.energizer.com/pdfs/cr2450.pdf

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

tianfei00 — Wed, 14 Nov 2018 09:14:15 GMT

Hi,

I have already took the j-link away when I do this test.

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

tianfei00 — Wed, 14 Nov 2018 09:00:47 GMT

Hi,

You are right and I do a test and find the CR2450 can output 15mA for several seconds.

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

tianfei00 — Wed, 14 Nov 2018 02:26:02 GMT

Hi,

I want to know how to configure the TX power?

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

AmbystomaLabs — Tue, 13 Nov 2018 13:08:17 GMT

It sounds like you have failed to put together a power usage plan for your product. You should review the CR battery specifications and you will find most are rated for 1mA maximum. Yes, only 1mA at any one time. Since the nRF like most all BLE SoC's uses about 10mA during TX/RX you have to do the engineering to make sure the local storage is sufficient (ie, caps) and the duty cycle is low enough (ie, your code) such that 1mA max is never exceeded. If you don't do this work nRF_Vdd will drop during TX/RX and you will have erratic radio behavior, disconnects and even brown out events.

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

Kenneth — Tue, 13 Nov 2018 12:47:38 GMT

You can get expected average current consumption values here for some BLE activity: https://devzone.nordicsemi.com/power/

RE: How long does nRF52832 work normally when using button cell powering for nRF52832 ?

Turbo J — Tue, 13 Nov 2018 10:46:17 GMT

Did you remember to power-cycle your nRF52832 after flashing/debugging via SWD?

Otherwise you will run through a coin cell very quickly, as the debug interface uses about 1mA constantly (and prevents the chip from properly sleeping).