nRF54L15 / nPM1300 low-power architecture questions for AI glasses EVT

[Hongyi]

Hello,

My name is Hongyi Liu and I am a rising junior from Washington University in St. Louis. We are preparing a compact AI glasses EVT build based on a Rockchip RK3576 chip-down architecture and are consolidating supplier feedback before PCB layout freeze. If this request should be routed through a distributor, sales engineer, NDA workflow or support portal, please point us to the right contact/channel.

Target item(s): nRF54L15 AON controller and nPM1300 AON/power support

Could you please help with the following?

1. Please confirm recommended nRF54L15 package, land pattern, SDK version and SWD/debug access for a compact wearable AON controller.

2. Please provide RF layout and antenna keep-out guidance for nRF54L15 if BLE is used in the left-temple AON board.

3. Please advise whether nPM1300 is appropriate as an AON support PMIC/gauge block when BQ25895 is the primary charger/power-path IC.

4. Please clarify recommended split of responsibility between nPM1300, BQ25895 and firmware for battery monitoring, low-power rails and shutdown thresholds.

5. Please suggest an evaluation-kit workflow to prove <=25 mW average AON mode and <=50 mW AON ceiling before final PCB layout.

6. Please tell us whether private support or distributor/FAE review is available for schematic and layout before EVT release.

Our target quantities are 5 pcs for EVT-A, 20 pcs for EVT-B, 100 pcs for PVT reference and 1000 pcs for production reference. Please also let us know whether an NDA is required for any non-public documentation.

Best regards,

Stanley

Washington University in St. Louis

[Kazi Afroza Sultana]

Hello,

Thanks for sharing your interest to work with nRF54L15 and nPM1300. 

1. If you look at the reference design of nRF54L15, you will see we have two option to for designing chip; one is CSP47 and another one is QFN48 (Reference circuitry • nRF54L15 | nRF54L10 | nRF54L05 Datasheet • Technical Documentation).

There you can find hardware design guideline nRF54L15 DK Hardware • nRF54L15 DK Hardware • Technical Documentation

2. Please Look at this link to have the schematic and layout filesnRF54L15 DK - Hardware files - nordicsemi.com

3 and 4.It could be a smart way to use nPM1300 an AON support PMIC/gauge block when BQ25895 is the primary charger/power-path IC. For nRF91 series, You can use PMIC unregulated output to power the SiP's internal buck regulators.

However I need to talk to PMIC team to know more the feasibility of this idea. 

5. You READ THIS https://academy.nordicsemi.com/courses/designing-low-power-bluetooth-le-products/lessons/lesson-2-designing-with-a-nordic-pmic/topic/getting-started-with-nordic-pmics/#getting-started-with-nordic-pmics to know about using nPM power up app for battery profiling, fuel gauge, configuring PMIC rails, measure quiescent currents etc. 

6.To get support you have to open ticket on devzone. We review schematic and layout design. We also provide antenna tuning service. To find the distributor, you can see this Find Distributor - nordicsemi.com page.

Thanks.

BR

Kazi