2 layers103.3 × 39.9 mm
2 layers103.3 × 39.9 mm
- Size
- 103.3 × 39.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 28
- Pads
- 161
- Tracks, vias
- 205, 62
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Mar 2025
- Updated
- 1 Jun 2025
Overview
BMS is an open-source printed circuit board by kbader94, from the kbader94/OpenActionCam repository on GitHub. It is a 2-layer board of 103.3 × 39.9 mm with 44 parts on 28 nets, routed with 205 tracks and 62 vias.
It is built around the LM2596S-ADJ, MM3220AA2NRH and AOSP36326C, with the SI4435FDY, SMAJ11A and SS24 among its other parts. Its parts include 15 capacitors, 8 resistors, 5 diodes, 5 fuses and 4 transistors. It belongs with the power boards of this library.
Main components
7
LM2596S-ADJ
TO-263-5-40℃~+125℃@(TA) 1 1.2V~37V 150kHz 3A 40V 80uA Adjustable Buck Buck Built-in No TO-263-5 DC-DC Converters ROHSUMWDC-DC Converters
MM3220AA2NRH
SOT-26A-40℃~+85℃ 2 SOT-26A Battery Management ROHSMitsumi ElectricBattery Management
AOSP36326C
SOIC-8-55℃~+150℃ 1 N-channel 1.8V 12A 2.5W 233pF 30V 31pF 542pF 9mΩ@10V 9nC@10V SOIC-8 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsSI4435FDY
SO-8-55℃~+150℃ 1 P-Channel 1.5nF 12.6A 150pF 180pF 19mΩ@10V 2.2V 2.2W 28nC@10V 30V P-Channel SO-8 MOSFETs ROHSVishay IntertechnologyMOSFETs
SMAJ11A
DO-214AC(SMA)ESD And Surge Protection (TVS/ESD)hongjiachengSS24
SMA(DO-214AC)-55℃~+150℃ 200uA@40V 2A 40V 50A 550mV@2A Independent SMA(DO-214AC) Schottky Diodes ROHShongjiachengSchottky DiodesSS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C8, C11, C12, C14, C15 |
| 4 | 47uF | Resistor_SMD:R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | C4, C5, C6, C34 |
| 2 | 100K | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C20, C21 |
| 2 | 2.2A Polyfuse | Fuse:Fuse_1210_3225Metric_Pad1.42x2.65mm_HandSolder | F1, F3 |
| 2 | 330 | Resistor_SMD:R_0603_1608Metric | R6, R7 |
| 2 | 9.1V Zener | Diode_SMD:D_MiniMELF_Handsoldering | D4, D5 |
| 2 | AOSP36326C | FET - AOSP36326C:SOIC127P490X600X175-8N | Q3, Q4 |
| 2 | Battery_Cell | Battery Holder - 18650:BAT_254 | BT3, BT4 |
| 2 | Polyfuse 6A | Fuse:Fuse_2920_7451Metric_Pad2.10x5.45mm_HandSolder | F4, F5 |
| 2 | SI4435FDY | FET - SI4435FDY:SO-8_VIS | Q1, Q2 |
| 1 | 0.1 uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C13 |
| 1 | 100uF 16V | Capacitor_SMD:CP_Elec_6.3x7.7 | C7 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 2.2K | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 3.1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | 330uF 10V | Capacitor_SMD:C_Elec_6.3x7.7 | C10 |
| 1 | 330uF Tantalum | C _Tantalum - TAJC337K006RNJ:CAPPM6032X280N | C9 |
| 1 | 33uH | Inductor - 125CDMCCDS 33uH:IND_125CDMCCDS-330MC | L1 |
| 1 | 6A Polyfuse | Fuse:Fuse_2920_7451Metric_Pad2.10x5.45mm_HandSolder | F2 |
| 1 | Conn_01x11 | Board:Board_outline | J4 |
| 1 | LM2596S-ADJ | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U2 |
| 1 | MCP73213-A6SI_MF | MCP73213-A6SI_MF:SON50P300X300X100-11N | U1 |
| 1 | MM3220AA2NRH | MM3220AA2NRH:IC_MM3220AA2NRH | U3 |
| 1 | SMAJ11A | Diode_SMD:D_SMA_Handsoldering | D16 |
| 1 | SS24 | Diode_SMD:D_SMA_Handsoldering | D14 |
| 1 | SS34 | Diode_SMD:D_SMA_Handsoldering | D3 |
Questions
How big is the BMS PCB?
It measures 103.3 × 39.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BMS use?
44 parts, built around the LM2596S-ADJ, MM3220AA2NRH, AOSP36326C and SI4435FDY. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the BMS KiCad files?
From the kbader94/OpenActionCam repository on GitHub, at the commit this page was made from: the board is hardware/BMS/BMS.kicad_pcb and its schematic hardware/BMS/BMS.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BMS design in my own project?
Its repository states no licence, so its author keeps all rights: ask kbader94 before reusing the design.
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