Power consumption question on nRF54L15

RE: Power consumption question on nRF54L15

Simonr — Thu, 12 Feb 2026 07:53:42 GMT

The Bluetooth peripheral power profiling application is a good sample to measure power consumption with the BLE stack used for communication: https://docs.nordicsemi.com/bundle/ncs-3.2.0/page/nrf/samples/bluetooth/peripheral_power_profiling/README.html

Best regards,

Simon

RE: Power consumption question on nRF54L15

Jianxuan Tu — Wed, 11 Feb 2026 18:51:11 GMT

Hi, Paka,

Thank you for the suggestion. Can you please help to provide a link to a recommended SDK?

Best regards,

Jianxuan

RE: Power consumption question on nRF54L15

PaKa — Wed, 11 Feb 2026 10:20:59 GMT

DTM is not power optimized so not a good sample for testing power consumption. There are other samples that work better, check the SDK.

RE: Power consumption question on nRF54L15

Jianxuan Tu — Tue, 10 Feb 2026 20:08:13 GMT

The setting was 255 byte payload and continuous Tx/Rx DTM mode. So the on time is long.

RE: Power consumption question on nRF54L15

Jianxuan Tu — Tue, 10 Feb 2026 19:51:57 GMT

Hi, Simon,

On the other end I connected the PPK2 to a nRF54L15-DK. And the DK was set to DTM and doing Tx/RX using the app.

Best regards,

Jianxuan

RE: Power consumption question on nRF54L15

Simonr — Tue, 10 Feb 2026 10:30:17 GMT

Can you share what application/project you have used for testing the current consumption? And are you testing on a development kit or custom board here? The radio seems to be on for a long time here and that this is not just Bluetooth advertising.

Best regards,

Simon

RE: Power consumption question on nRF54L15

Jianxuan Tu — Mon, 09 Feb 2026 22:38:26 GMT

Hi, Simon, Thank you for the answer. I tried to verify the power consumption using PPK2 and have some discrepancies comparing to the data sheet. Here are some screenshots. Those captured by PPK2 were all ~2.5mA higher than those in the data sheet. Can you please help to explain what caused the delta? Thanks.

Tx 0dBm: Tx current ~7.7 mA, Avg 6.7 mA

devzone.nordicsemi.com/.../2465.ppk_2D00_20260209T221951_5F00_1Mbps_5F00_0dBm.csv

Tx 4dBm: Tx current ~10 mA, Avg 8.3 mA

devzone.nordicsemi.com/.../2477.ppk_2D00_20260209T222250_5F00_ch1_5F00_1Mbps_5F00_4dBm.csv

Tx 8dBm: Tx current ~12.5 mA, Avg 11 mA

devzone.nordicsemi.com/.../8321.ppk_2D00_20260209T222654_5F00_ch1_5F00_1Mbps_5F00_8dBm.csv

Rx: Avg ~5.4 mA

devzone.nordicsemi.com/.../ppk_2D00_20260209T222802_5F00_Rx_5F00_ch1.csv

RE: Power consumption question on nRF54L15

Simonr — Thu, 29 Jan 2026 11:06:31 GMT

You are correct, the IRADIO_xx numbers is the full system power consumption while the ITX/IRX numbers is the radio peripheral only. The key features are different in the latest version of the nRF54L15 datasheet and match the IRADIO_ numbers: https://docs-be.nordicsemi.com/bundle/ps_nrf54L15/page/pdf/nRF54L15_nRF54L10_nRF54L05_Datasheet_v1.0.pdf

For power consumption numbers in different scenarios, please check out the online power profiler available here which gives you estimates of the expected current consumption with various connection intervals, advertising intervals, etc. Online Power Profiler for Bluetooth LE

Best regards,

Simon