BMS SCHOOL
About the BMS SCHOOL PCB
BMS SCHOOL is an open source PCB design by mirkoj-boop, published on GitHub. It is a 2-layer board measuring 136.4 × 85.6 mm, with 80 components from 40 distinct parts.
Other key parts include the TL431DBZ, PC817, LM3914N, VIPer26LD and BQ7790500PWR. By type, the board carries 17 capacitors, 16 diodes, 12 resistors, 5 ICs, 4 battery holders and 3 transistors.
It belongs with the power & battery designs in this gallery.
From the project
BMS sustav za kolegij Elektrotehničke tehnologije
- 4S Li-Ion protection via BQ77905 - OVP, UVP, OCD, SCD, OT/UT per cell - Passive cell balancing (VC1–VC5) - Isolated flyback AC/DC charger - VIPer26LD + PC817 + TL431 feedback - 10-segment LED battery indicator - LM3914 - AC EMI filter - X+Y capacitors, varistor surge protection - Temperature monitoring - NTC thermistor on TS pin
- TI SLUA793 — BQ77905 Design Considerations in High-Current Applications - DigiKey Reference Design — AC/DC SMPS Multi-Output (STEVAL-ISA081V1) - EEVblog — How Does This Flyback Feedback Circuit Work? - BQ77905 Product Page — Texas Instruments - VIPer26LD…
Main components on the BMS SCHOOL
BMS SCHOOL bill of materials (BOM)
80 components, 40 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL431DBZ | SOT-23 | U1 |
| 1 | PC817 | DIP-4_W7.62mm | U2 |
| 1 | LM3914N | DIP-18_W7.62mm | U3 |
| 1 | VIPer26LD | SOIC-16_3.9x9.9mm_P1.27mm | U18 |
| 1 | BQ7790500PWR | TSSOP-20_4.4x6.5mm_P0.65mm | U21 |
| 3 | CSD19531Q5A | TDSON-8-1 | Q22, Q23, Q24 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J1 |
| 1 | BATT_PACK - | TerminalBlock_MetzConnect_360271_1x01_Horizontal_ScrewM3.0_Boxed | J5 |
| 4 | R | R_0805_2012Metric | 1M3, 1M5, 6ohm1, RVO1 |
| 2 | 10k | R_0805_2012Metric | 10k2, 10k3 |
| 4 | Battery | BatteryHolder_Keystone_2460_1xAA | BT15, BT16, BT17, BT18 |
| 1 | Choke_CommonModePH9455x156NL | L_CommonMode_PulseElectronics_PH9455xxx6NL_2 | FL1 |
| 1 | P300PL104M275xC332 | Filter_KEMET_PZB300_24.0x12.5mm_P10.0mm | FL2 |
| 1 | 5 ohm | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | Inrush1 |
| 3 | 100 | R_0805_2012Metric | RFLY1, Rsrn1, Rsrp1 |
| 1 | R_Pot_Trim | R_0805_2012Metric | RV1 |
| 2 | R_Pot_Trim | Potentiometer_ACP_CA6-VSMD_Vertical | RV2, RV3 |
| 4 | 1k | R_0805_2012Metric | Rbat1, Rbat2, Rbat3, Rbat4 |
| 1 | 750811647 EE20_10_6_750811647 Wurth Elektronik | Transformer_Wuerth_760871131 | T3 |
| 1 | Thermistor | R_0805_2012Metric | TH2 |
Show 20 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BZV55B18 | D_MiniMELF | D1 |
| 1 | KBPC1504W | Diode_Bridge_GeneSiC_KBPC_W | D2 |
| 1 | RF01VM2S | D_SOD-323 | D3 |
| 1 | CDBA340-HF | D_SMA | D4 |
| 1 | PTVS15VZ1USK | Nexperia_DSN1608-2_1.6x0.8mm | D5 |
| 10 | LED | LED_0805_2012Metric | D6, D8, D9, D10, D11, D12, D13, D14 +2 |
| 1 | BAS21 | SOT-23 | D7 |
| 3 | 470uF | C_0805_2012Metric | C1, C2, C3 |
| 1 | 10qf | CP_Radial_D5.0mm_P2.00mm | C17 |
| 2 | 22qf | CP_Radial_D5.0mm_P2.00mm | C18, C19 |
| 1 | 22qf | C_0805_2012Metric | C20 |
| 1 | 2.2nf | C_0805_2012Metric | C21 |
| 1 | 4.7nF | CP_Radial_D5.0mm_P2.00mm | C24 |
| 8 | 22qf | C_0402_1005Metric | C30, C31, C33, C34, C35, C36, C37, C38 |
| 2 | 220Ohm | R_0805_2012Metric | R1, R2 |
| 2 | 51k | R_0805_2012Metric | R3, R4 |
| 2 | 10k | R_0805_2012Metric | R5, R17 |
| 1 | 100 Ohm | R_0805_2012Metric | R6 |
| 1 | 100 | R_0805_2012Metric | R9-opt1 |
| 4 | R | R_0805_2012Metric | R11, R12, R13, R14 |
BMS SCHOOL design files
The KiCad project lives in the mirkoj-boop/BMS_SCHOOL repository on GitHub; these links point at the commit this page was built from.
- LayoutBMS.kicad_pcb
- SchematicBMS.kicad_sch
BMS SCHOOL: common questions
How big is the BMS SCHOOL PCB?
The BMS SCHOOL measures 136.4 × 85.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BMS SCHOOL?
80 components, from 40 distinct parts. The full bill of materials is listed on this page.
Where can I download the BMS SCHOOL design files?
From the mirkoj-boop/BMS_SCHOOL repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the BMS SCHOOL design in my own project?
The repository has no license, so all rights stay with mirkoj-boop. Use it as a reference, and ask the author before reusing the design.
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