Nref batterypack
About the Nref batterypack PCB
Nref batterypack is an open source PCB design by cetola, published on GitHub. It is a 4-layer board measuring 75 × 17 mm, with 83 components from 27 distinct parts.
Other key parts include the BQ76922. By type, the board carries 35 resistors, 17 diodes, 13 capacitors, 7 transistors, 6 connectors and 1 IC.
It belongs with the power & battery and audio designs in this gallery.
From the project
The original Open Hardware laptop, reloaded.
The original Open Hardware laptop, reloaded.
MNT Reform Next takes the MNT Reform family's modular approach a few steps further: The motherboard doesn't have any exterior ports, instead it breaks out all important signals in groups to FPC and JST-SH headers. The connectivity to the outside is implemented via user-exchangable Port Boards that increase repairability, customizability and future proofing of interfaces. The motherboard provides the system controller (RP2040 based), main (multi chemistry) LiFePO4/LiIon charger buck/boost controller, main 5V and 3V3 power rails and the SOM…
Main components on the Nref batterypack
Nref batterypack bill of materials (BOM)
83 components, 27 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BQ76922 Texas Instruments | Texas_RSN_WQFN-32-1EP_4x4mm_P0.4mm_EP2.8x2.8mm | U1 |
| 4 | BC817-25LT1G BC817 onsemi | SOT-23 | Q1, Q2, Q3, Q4 |
| 2 | AO3401A Alpha & Omega | SOT-23 | Q5, Q7 |
| 1 | CSD87501L Q_Dual_NMOS_Picostar_CSD87501L Texas Instruments | TI_PICOSTAR_LGA-10_3.37x1.47mm_P0.65mm | Q8 |
| 1 | MY-FJ-115 C1- MYOUNG | MYOUNG_MY-FJ-115 | J1 |
| 1 | 2036-3-57-15-00-00-03-0 C2+ Mill-Max | Mill-Max_2036-X-57 | J2 |
| 1 | MY-FJ-115 C3- MYOUNG | MYOUNG_MY-FJ-115 | J3 |
| 1 | 2036-3-57-15-00-00-03-0 C4+ Mill-Max | Mill-Max_2036-X-57 | J4 |
| 1 | BM07B-SRSS-TB PACK_CONN JST | JST_SH_BM07B-SRSS-TB_1x07-1MP_P1.00mm_Vertical | J5 |
| 1 | SM02B-SRSS-TB BACK_CONN JST | JST_SH_SM02B-SRSS-TB_1x02-1MP_P1.00mm_Horizontal | J6 |
| 3 | CMFX 103F3435 Thermistor Nanjing Shiheng | R_0402_1005Metric | TH1, TH3, TH4 |
| 1 | NTCGS103JX103DT7 Thermistor TDK | R_0402_1005Metric | TH2 |
| 1 | B140WS-7 40V Diodes | D_SOD-323 | D1 |
| 12 | BAS70LP-7B BAS70LP Diodes | D_SOD-882 | D2, D3, D4, D5, D8, D10, D11, D12 +4 |
| 4 | NCD0402R1 Red LCSC | LED_0402_1005Metric | D9, D17, D18, D19 |
| 8 | CL05B104KO5NNNC 100nF Samsung | C_0402_1005Metric | C1, C3, C4, C5, C6, C12, C13, C14 |
| 2 | 0402CG101J500NT 100pF FH | C_0402_1005Metric | C2, C7 |
| 2 | GRM155R61E225ME15D 2.2uF/25V Murata | C_0402_1005Metric | C8, C10 |
| 1 | CL05A474KA5NNNC 470nF/25V Samsung | C_0402_1005Metric | C9 |
| 4 | FRP1206J390 TS 39 FOJAN | R_1206_3216Metric | R1, R2, R3, R4 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PE0612FKF070R015L 15mΩ 1% Yageo | R_Shunt_Kelvin_Littlefuse_L4CA | R5 |
| 14 | 0402WGF1000TCE 100 UNI-ROYAL | R_0402_1005Metric | R6, R7, R8, R10, R12, R14, R16, R29 +6 |
| 4 | RC0402FR-07240RL 240 Yageo | R_0402_1005Metric | R9, R11, R13, R15 |
| 4 | RC0402FR-0710ML 10M Yageo | R_0402_1005Metric | R18, R21, R22, R25 |
| 4 | 0402WGF1001TCE 1k UNI-ROYAL | R_0402_1005Metric | R19, R20, R23, R24 |
| 1 | GR1812J270RT4G00 270 GiantOhm | R_1812_4532Metric | R26 |
| 3 | 0402WGF1002TCE 10k UNI-ROYAL | R_0402_1005Metric | R27, R28, R36 |
Nref batterypack design files
The KiCad project lives in the cetola/reform-next-mirror repository on GitHub; these links point at the commit this page was built from.
Nref batterypack: common questions
How big is the Nref batterypack PCB?
The Nref batterypack measures 75 × 17 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Nref batterypack?
83 components, from 27 distinct parts. The full bill of materials is listed on this page.
Where can I download the Nref batterypack design files?
From the cetola/reform-next-mirror repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Nref batterypack design in my own project?
The repository has no license, so all rights stay with cetola. Use it as a reference, and ask the author before reusing the design.
More boards in reform-next-mirror
RP2040/RP2350Nref motherboard
122.6 × 75.9 mm269 parts6LNo license0
Nref ports one
88 × 35.9 mm146 parts4LNo license0
Nref ports two
87.5 × 40.2 mm137 parts4LNo license0
Reform camera
46 × 46 mm114 parts4LNo license0
Hdmi edp2
43.5 × 32.5 mm93 parts4LNo license0
Nref usb3-redriver
54.5 × 32 mm40 parts4LNo license0
Nref wifi m2
66 × 24 mm28 parts4LNo license0
Nref wifi
66 × 33 mm23 parts2LNo license0
Trackpad IQS9150
105.5 × 53.3 mm10 parts2LNo license0
Nref batterypack backside
75 × 17 mm3 parts4LNo license0
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