Backplane Prototype
About the Backplane Prototype PCB
Backplane Prototype is an open source STM32 PCB design by kquinsland, published on GitHub. It is a 4-layer board measuring 151.8 × 30.8 mm, with 70 components from 35 distinct parts.
Its main chip is the STM32C092GCU6, from the STM32 family. Other key parts include the LM5164DDAR, INA237AIDGSR and TCAN3413DR. By type, the board carries 22 capacitors, 22 resistors, 11 connectors, 5 ICs, 4 transistors and 3 inductors.
From the project
Hardware, firmware, and host tooling for a modular mini-rack power system.
This directory contains the finalized Generation-2 backplane: backplane.kicadpro, backplane.kicadsch, backplane.kicadpcb, and backplane.kicaddru.
The PCB in this directory is the mechanical authority for the board outline, airflow cutouts, mounting holes, and six slot-connector footprints and placement. The carrier is the electrical authority for circuitry shared between the two boards, including the slot pinout, STM32, CAN transceiver, current sensor, and slot connector pinout.
Main components on the Backplane Prototype
Backplane Prototype bill of materials (BOM)
70 components, 35 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32C092GCU6 STMicroelectronics | QFN-28_4x4mm_P0.5mm | U1 |
| 2 | LM5164DDAR Texas Instruments | TI_SO-PowerPAD-8 | U2, U3 |
| 1 | INA237AIDGSR Texas Instruments | MSOP-10_3x3mm_P0.5mm_0.20mm_Clearance | U4 |
| 1 | TCAN3413DR Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 2 | AO3407A Alpha & Omega Semiconductor | SOT-23 | Q1, Q3 |
| 2 | 2N7002 Nexperia | SOT-23 | Q2, Q4 |
| 6 | XT30U(2+2)-F.G.B XT30U_2+2 AMASS | Amass_XT30U_2plus2_F | J1, J2, J3, J4, J5, J6 |
| 1 | XY308-2.54-3P XY308-2.54-3P / EXTERNAL CAN XINLAIYA | TerminalBlock_Xinya_XY308-2.54-3P_1x03_P2.54mm_Horizontal | J7 |
| 1 | DB910-6.35-2P-GN-S DC IN DORABO | DORABO_DB910-6.35-2P-GN-S | J8 |
| 2 | TBD / user fan header 12V 3-WIRE FAN TBD | FanPinHeader_1x03_P2.54mm_Vertical_JLC_Edge | J9, J11 |
| 1 | TBD / user pin header DS18B20 EXT SUPPLY TBD | PinHeader_1x03_P2.54mm_Vertical | J12 |
| 1 | HoLSX2512-6W-1mR-1% 1mR 1% 6W Milliohm | R_2512_6332Metric | RSH1 |
| 1 | WS2812B-4020-V6 Worldsemi | LED_Worldsemi_WS2812B-4020-V6_SideView | LED1 |
| 1 | PESD2CANFD27V-TR Nexperia | SOT-23 | D1 |
| 2 | PSPMAA0805-101M-ANP 100uH PROD Tech | L_PRODTech_PSPMAA0805 | L1, L2 |
| 1 | ACT1210D-101-2P-TL00 TDK | L_CommonModeChoke_TDK_ACT1210D | L3 |
| 4 | CL32B225KCJSNNE 2.2uF 100V Samsung Electro-Mechanics | C_1210_3225Metric | C1, C2, C7, C8 |
| 4 | 0603B222K500NT 2.2nF 50V FH (Guangdong Fenghua Advanced Tech) | C_0603_1608Metric | C3, C5, C9, C12 |
| 4 | CL21A226MAQNNNE 22uF 25V Samsung Electro-Mechanics | C_0805_2012Metric | C4, C10, C11, C14 |
| 1 | CC0603JRNPO9BN221 220pF C0G YAGEO | C_0603_1608Metric | C6 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 0603CG560J500NT 56pF 50V C0G FH (Guangdong Fenghua Advanced Tech) | C_0603_1608Metric | C13 |
| 7 | CC0603KRX7R9BB104 100nF YAGEO | C_0603_1608Metric | C15, C16, C17, C19, C20, C21, C22 |
| 1 | CL10A475KO8NNNC 4.7uF Samsung Electro-Mechanics | C_0603_1608Metric | C18 |
| 1 | 0603WAF2702T5E 27k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R1 |
| 2 | 0603WAF1103T5E 110k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R2, R4 |
| 1 | 0603WAF6202T5E 62k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R3 |
| 5 | 0603WAF1003T5E 100k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R6, R18, R19, R21, R22 |
| 1 | 0603WAF4533T5E 453k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R7 |
| 1 | 0603WAF4992T5E 49.9k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R8 |
| 1 | 0603WAF3303T5E 330k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R9 |
| 4 | 0603WAF1002T5E 10k UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R10, R15, R20, R23 |
| 2 | 0603WAF100JT5E 10R UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R11, R12 |
| 2 | 0603WAF2201T5E 2.2k UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R13, R14 |
| 1 | 0603WAF1200T5E 120R 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R17 |
| 1 | 0603WAF4701T5E 4.7k 1% UNI-ROYAL (Uniroyal Elec) | R_0603_1608Metric | R24 |
Backplane Prototype design files
The KiCad project lives in the kquinsland/modular-rack-mount-power-system repository on GitHub; these links point at the commit this page was built from.
Backplane Prototype: common questions
What microcontroller does the Backplane Prototype use?
The Backplane Prototype is built around the STM32C092GCU6, from the STM32 family.
How big is the Backplane Prototype PCB?
The Backplane Prototype measures 151.8 × 30.8 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Backplane Prototype?
70 components, from 35 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Backplane Prototype design files?
From the kquinsland/modular-rack-mount-power-system repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Backplane Prototype design in my own project?
The repository has no license, so all rights stay with kquinsland. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Backplane Prototype without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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