2 layers73.7 × 76.8 mm
2 layers60 × 50 mm
8-Cell Balancer
jbussmann/8-Cell_BalancerPrototype 8-Cell Balancer I work on in my streams.
- Size
- 60 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 263
- Nets
- 176
- Pads
- 689
- Tracks, vias
- 1,301, 254
- Pours
- 47
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 Jan 2024
- Updated
- 6 Mar 2025
Overview
8-Cell Balancer is an open-source printed circuit board by jbussmann, from the jbussmann/8-Cell_Balancer repository on GitHub. It is a 2-layer board of 60 × 50 mm with 263 parts on 176 nets, routed with 1,301 tracks and 254 vias.
It is built around the TLV9052ID, NINA-B306-00B and 74HC4051, with the AP7370-33Y, RB751S40 and BSS84AKW among its other parts. Its parts include 93 resistors, 56 capacitors, 33 diodes, 24 transistors and 12 ICs.
Main components
9
TLV9052ID
SOIC-8-40℃~+125℃ 1.8V~6V 15V/us 15nV/√Hz@1kHz 1pA 2 2pA 330uA 330uV 500nV/℃ 50mA 5MHz 96dB Enable/shutdown function、EMI filtering/RF suppression Rail-to-Rail Input, Rail-to-Rail Output SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
NINA-B306-00B
SMD-55PSMD-55P Bluetooth Modules ROHSu-bloxBluetooth Modules
74HC4051
SOP-16-40℃~+85℃ 1 170MHz 28ns 29ns 3V~9V 5ns 5pF 80Ω 8:1 SOP-16 Analog Switches, Multiplexers ROHSWuxi I-core ElecAnalog Switches, Multiplexers
AP7370-33Y
SOT-89-40℃~+125℃@(Tj) 1 1.5uA 18V 3.3V 300mA 500mV@(100mA) Fixed Over Current Protection、Short Circuit Protection、Thermal Shutdown Positive SOT-89 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
RB751S40
SOD-5231 Independent 120mA 200mA 370mV@1mA 40V 500nA@30V SOD-523 Schottky Diodes ROHSNexperiaSchottky Diodes
BSS84AKW
SC-70-55℃~+150℃ 1 P-Channel 1.3pF 150mA 2.1V 260mW 350pC@5V 36pF 50V 7.5Ω@10V P-Channel SC-70 MOSFETs ROHSNexperiaMOSFETs
BZT52H-C6V2
SOD-123F1 Independent 10Ω 3uA@4V 5.8V~6.6V 6.2V 830mW SOD-123F Zener Diodes ROHSNexperiaZener Diodes
IRLU120NPBF
TO-251AA-55℃~+175℃ 1 N-channel 100V 10A 20nC 225mΩ@5V 2V 440pF 48W 50pF 97pF N-Channel ±16V TO-251AA MOSFETs ROHSInfineon TechnologiesMOSFETs
B3U-1000P
SMD,3x2.5mm-25℃~+70℃ 1.53N 1.6mm 12V 2.5mm 3mm 50mA Round Button SMD(SMT) Tab SPST Surface Mount,Vertical SMD,3x2.5mm Tactile Switches ROHSOmronTactile Switches
README
README.md8-Cell Balancer Charger
This is the repository of a prototype 8-Cell Balancer Charger I have been working on for quite some time. If you would like to follow the development progress, feel free to visit my streams at https://www.twitch.tv/jbussmann where I usually work on this project.
Parts
263| Qty | Value | Footprint | References |
|---|---|---|---|
| 46 | 100n | Capacitor_SMD:C_0402_1005Metric | C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25 +30 |
| 32 | 4.7k | Resistor_SMD:R_0402_1005Metric | R13, R15, R16, R18, R26, R28, R29, R31, R39, R41, R42, R44, R104, R106, R107, R109 +16 |
| 27 | 620R | Resistor_SMD:R_0402_1005Metric | R108, R118, R119, R120, R121, R122, R123, R124, R125, R134, R135, R136, R137, R138, R139, R140 +11 |
| 24 | RB751S40 | Diode_SMD:D_SOD-523 | D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25 +8 |
| 18 | 22k | Resistor_SMD:R_0402_1005Metric | R1, R2, R14, R27, R40, R53, R66, R105, R126, R127, R128, R129, R130, R131, R132, R133 +2 |
| 16 | BSS84AKW | Package_TO_SOT_SMD:SOT-323_SC-70 | Q4, Q5, Q9, Q10, Q14, Q15, Q19, Q20, Q24, Q25, Q29, Q30, Q34, Q35, Q39, Q40 |
| 8 | 0R1 | Resistor_SMD:R_0603_1608Metric | R12, R25, R38, R51, R64, R77, R90, R103 |
| 8 | 3.3n | Capacitor_SMD:C_0402_1005Metric | C49, C50, C51, C52, C53, C54, C55, C56 |
| 8 | 330k | Resistor_SMD:R_0402_1005Metric | R11, R24, R37, R50, R63, R76, R89, R102 |
| 8 | BZT52H-C6V2 | Diode_SMD:D_SOD-123F | D2, D3, D4, D5, D6, D7, D8, D9 |
| 8 | Current | 0_ProjectLibrary:TestPoint_Pad_D1.0mm | TP5, TP8, TP11, TP14, TP17, TP20, TP23, TP26 |
| 8 | IRLU120NPBF | 0_ProjectLibrary:TO-251-3_Flipped | Q3, Q8, Q13, Q18, Q23, Q28, Q33, Q38 |
| 8 | NetTie | 0_ProjectLibrary:NetTie-2_SMD_Pad0.127mm | NT1, NT2, NT3, NT4, NT5, NT6, NT7, NT8 |
| 8 | PWM | 0_ProjectLibrary:TestPoint_Pad_D1.0mm | TP3, TP6, TP9, TP12, TP15, TP18, TP21, TP24 |
| 8 | TLV9052 | Package_TO_SOT_SMD:SOT-23-8 | U5, U6, U7, U8, U9, U10, U11, U12 |
| 8 | Voltage | 0_ProjectLibrary:TestPoint_Pad_D1.0mm | TP4, TP7, TP10, TP13, TP16, TP19, TP22, TP25 |
| 4 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID1, FID2, FID3, FID4 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 74HC4051 | 0_ProjectLibrary:QFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2.5mm | U2, U3 |
| 2 | B3U-1000 | 0_ProjectLibrary:Button_B3U-1000 | SW1, SW2 |
| 1 | AP7370 | 0_ProjectLibrary:Diodes_UDFN2020-6 | U1 |
| 1 | Balance | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J1 |
| 1 | LED | 0_ProjectLibrary:LED_RGB_1x1mm | D1 |
| 1 | LOGO | 0_ProjectLibrary:jb_6mm | G*** |
| 1 | NINA-B306 | 0_ProjectLibrary:Module_ublox_NINA-B306 | U4 |
| 1 | P0.11 | 0_ProjectLibrary:TestPoint_Pad_D1.0mm | TP1 |
| 1 | P0.14 | 0_ProjectLibrary:TestPoint_Pad_D1.0mm | TP2 |
| 1 | SWD | 0_ProjectLibrary:PinHeader_1x06_P1.27mm_Vertical | J2 |
The 261 most common of 263 parts.
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Questions
How big is the 8-Cell Balancer PCB?
It measures 60 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 8-Cell Balancer use?
263 parts, built around the TLV9052ID, NINA-B306-00B, 74HC4051 and AP7370-33Y. 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 8-Cell Balancer KiCad files?
From the jbussmann/8-Cell_Balancer repository on GitHub, at the commit this page was made from: the board is Hardware/8-Cell Balancer.kicad_pcb and its schematic Hardware/8-Cell Balancer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 8-Cell Balancer design in my own project?
Its repository states no licence, so its author keeps all rights: ask jbussmann before reusing the design.