Precharge controller board
About the Precharge controller board
Precharge controller board is an open source STM32 PCB design by wangyanyu1817, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 212 components from 80 distinct parts.
Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the CHT11, CS100, TJA1051T-3, TPS54331D and AMS1117-3.3,C347222. By type, the board carries 81 resistors, 46 capacitors, 33 diodes, 15 ICs, 10 fuses and 9 transistors.
From the project
- 8 路独立低边 MOSFET 输出（驱动接触器、电磁阀等感性负载） - 24V 车载电源输入，板内产生 5V / 3.3V 给 MCU 和外设 - 隔离式光耦输入（8 路，低电平有效） - CAN 总线通信（TJA1051T-3） - RS485 总线通信（预留/可选） - STM32F103C8T6 作为主控，通过 SPI 或 GPIO 控制输出
- 8 路独立低边 MOSFET 输出（驱动接触器、电磁阀等感性负载） - 24V 车载电源输入，板内产生 5V / 3.3V 给 MCU 和外设 - 隔离式光耦输入（8 路，低电平有效） - CAN 总线通信（TJA1051T-3） - RS485 总线通信（预留/可选） - STM32F103C8T6 作为主控，通过 SPI 或 GPIO 控制输出
- 电源保护：输入端防反接（SS54）+ TVS（SMBJ30A）+ 共模电感（预留）+ 220μF 电解电容。 - MOSFET 驱动：每个通道独立栅极电阻（22Ω）和下拉电阻（10kΩ），栅极走线短于 10mm。 - 接地策略：板内单点接地（功率地与控制地在电源输入电容负极汇合），CANGND 通过 0Ω 电阻连接到 DGND，全车只有一个点接机壳地。 - CAN/RS485：采用双端子（IN/OUT）菊花链拓扑，预留 120Ω 终端电阻焊盘。 - 测试点：预留 24V、5V、3.3V、GND、CANH、CAN_L 等测试点。
Main components on the Precharge controller board
Precharge controller board bill of materials (BOM)
212 components, 80 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CHT11 SL27511A/C46061828 | SOT-23-6 | U1 |
| 1 | CS100 SL27511A/C46061828 | SOT-23-6 | U2 |
| 1 | TJA1051T-3 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | TPS54331D | TI_SO-PowerPAD-8_ThermalVias | U4 |
| 1 | STM32F103C8Tx | LQFP-48_7x7mm_P0.5mm | U5 |
| 1 | AMS1117-3.3,C347222 | SOT-223-3_TabPin2 | U6 |
| 6 | SL27511A/C46061828 | SOT-23-6 | U7, U8, U9, U10, U11, U12 |
| 1 | MAX3485ESA(UMW) | SOIC-8_3.9x4.9mm_P1.27mm | U13 |
| 2 | TLP290-4 | SOP-16_4.55x10.3mm_P1.27mm | U14, U15 |
| 8 | AOD4184A/C99124 | TO-252-2 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 1 | S8050 | SOT-23 | Q9 |
| 1 | X32258MOB4SI | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | CONN_01X19_SOCKET Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | CONN_01X19_SOCKET MX250-3.5-02P-A-GY01-Cu-A/C7467028 | MX250-3.5-03P-A-GY01-Cu-A | J2 |
| 1 | CONN_01X02_PIN MX250-3.5-02P-A-GY01-Cu-A/C7467028 | MX250-3.5-03P-A-GY01-Cu-A | J3 |
| 1 | CONN_01X02_PIN MX250-3.5-02P-A-GY01-Cu-A/C7467028 | MX250-3.5-02P-A-GY01-Cu-A | J4 |
| 1 | CONN_01X02_PIN MX250-3.5-08P-B-GY01-Cu-A/C7470122 | MX250-3.5-08P-B-GY01-Cu-A | J5 |
| 1 | MX250-3.5-02P-A-GY01-Cu-A/C7467028 | MX250-3.5-03P-A-GY01-Cu-A | J6 |
| 1 | MX250-3.5-08P-B-GY01-Cu-A/C7470122 | MX250-3.5-08P-B-GY01-Cu-A | J7 |
| 1 | CONN_01X04_PIN MX250-3.5-02P-A-GY01-Cu-A/C7467028 | MX250-3.5-03P-A-GY01-Cu-A | J8 |
Show 60 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BSMD2920-400-30V/C20539726 | Fuse_2920_7451Metric | F1 |
| 1 | 1812L150/30GR-C52748007 | Fuse_1812_4532Metric | F2 |
| 8 | BSMD1812-200-30V/C960026 | Fuse_1812_4532Metric | F10, F11, F12, F13, F14, F15, F16, F17 |
| 1 | CHOKE_TDK_B82789C104N2 Choke_TDK_B82789C104N2 | L_CommonModeChoke_TDK_ACT45B-101-2P-TL003 | FL1 |
| 1 | Choke_TDK_B82789C104N2 | L_CommonModeChoke_TDK_ACT45B-101-2P-TL003 | FL2 |
| 2 | SW_DIP_x01,DSIC01LS-P | SW_DIP_SPSTx01_Slide_6.7x4.1mm_W8.61mm_P2.54mm_LowProfile | SW1, SW5 |
| 1 | TS-1088-AR02016 | SW_Push_SPST_TS-1088-AR02016 | SW2 |
| 1 | SW_Push | SW_Push_SPST_TS-1088-AR02016 | SW3 |
| 1 | TP-03/C559166 | SW_DIP_SPSTx03_Slide_KingTek_DSHP03TS_W7.62mm_P1.27mm | SW4 |
| 1 | PESD1CAN | SOT-23 | D1 |
| 9 | SS34 | D_SMA | D2, D7, D8, D9, D10, D11, D12, D13 +1 |
| 1 | SS510 | D_SMA | D3 |
| 1 | LED green, 0603 | LED_0603_1608Metric | D4 |
| 2 | LED_0603_R | LED_0603_1608Metric | D5, D6 |
| 1 | SMBJ6.5CA | D_SMB | D15 |
| 1 | SMBJ30A/C83851 | D_SMB | D16 |
| 1 | PESD1CAN | SOT-23 | D17 |
| 16 | green/0603 | LED_0603_1608Metric | D18, D19, D20, D21, D22, D23, D24, D25 +8 |
| 1 | FXL0630-100-M | L_APV_APH0630 | L1 |
| 1 | ACM7060-301-2PL-TL01 | L_CommonModeChoke_TDK_ACM7060 | L4 |
| 1 | 100NF 100nF/0805/16V | C_0805_2012Metric | C1 |
| 2 | 12PF 100nF/0805/16V | C_0805_2012Metric | C2, C3 |
| 1 | 100NF 100nF | C_0603_1608Metric | C4 |
| 2 | 100PF 100pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C6 |
| 1 | 47NF 47nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7 |
| 1 | 220uF/16V/RVT1C221M0607 | CP_Elec_6.3x7.7 | C8 |
| 2 | 1nF/12/2kV | C_1206_3216Metric | C9, C14 |
| 1 | 8.2nF/50V | C_0603_1608Metric | C10 |
| 1 | 10pF/50V | C_0603_1608Metric | C11 |
| 1 | 1.2nF | C_0603_1608Metric | C12 |
| 2 | 100nF/50V | C_0603_1608Metric | C13, C33 |
| 2 | 10uF/50V | C_0603_1608Metric | C15, C16 |
| 1 | 100NF 12pf | C_0603_1608Metric | C17 |
| 1 | 12pf | C_0603_1608Metric | C18 |
| 7 | 100nF | C_0603_1608Metric | C19, C20, C21, C22, C23, C24, C34 |
| 5 | 100nF/0805/16V | C_0805_2012Metric | C25, C28, C29, C30, C31 |
| 1 | RVT1C100M0405,10uF,16V | C_Elec_4x5.4 | C26 |
| 1 | RVT1A220M0405,22uF,10V | C_Elec_4x5.4 | C27 |
| 2 | 22uF ±20% 50V/RVT1H220M0605 | C_Elec_6.3x5.4 | C32, C45 |
| 2 | CL10C470JB8NNNC,47pF,50V | C_0603_1608Metric | C35, C36 |
| 8 | 0.1uF/50V | C_0603_1608Metric | C37, C38, C39, C40, C41, C42, C43, C44 |
| 1 | 220uF/50V/JVJ50V220M10x10 | CP_Elec_10x10 | C46 |
| 1 | 4.7K 22R/0805/16V | R_0805_2012Metric | R1 |
| 1 | 24.3K | R_0603_1608Metric | R2 |
| 2 | 120R,1% | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R73 |
| 2 | 1.3K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R5 |
| 8 | 0R | R_0603_1608Metric | R6, R17, R18, R19, R20, R21, R22, R25 |
| 7 | 10k | R_0603_1608Metric | R7, R11, R14, R15, R16, R54, R56 |
| 1 | 50K,1% | R_0603_1608Metric | R8 |
| 1 | 10K,1% | R_0603_1608Metric | R9 |
| 9 | 4.7K,1% | R_0603_1608Metric | R10, R57, R58, R59, R60, R61, R62, R63 +1 |
| 10 | 1K | R_0603_1608Metric | R12, R13, R74, R75, R76, R77, R78, R79 +2 |
| 15 | 22R/0805/16V | R_0805_2012Metric | R23, R26, R27, R29, R30, R32, R33, R35 +7 |
| 8 | 10K/0805/16V | R_0805_2012Metric | R24, R28, R31, R34, R37, R40, R43, R46 |
| 1 | BLM18PG121SN1D/0603/C14709 | R_0603_1608Metric | R47 |
| 2 | 0R/0603 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R48, R49 |
| 2 | 4.7K,5% | R_0603_1608Metric | R50, R51 |
| 2 | 20R,1% | R_0603_1608Metric | R52, R53 |
| 1 | 120R,1% | R_0603_1608Metric | R55 |
| 8 | 4.7K/0603/5% | R_0603_1608Metric | R65, R66, R67, R68, R69, R70, R71, R72 |
Precharge controller board design files
The KiCad project lives in the wangyanyu1817/precharge_controller_board repository on GitHub; these links point at the commit this page was built from.
Precharge controller board: common questions
What microcontroller does the Precharge controller board use?
The Precharge controller board is built around the STM32F103C8Tx, from the STM32 family.
How big is the Precharge controller board?
The Precharge controller board measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Precharge controller board?
212 components, from 80 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 Precharge controller board design files?
From the wangyanyu1817/precharge_controller_board 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 Precharge controller board design in my own project?
The repository has no license, so all rights stay with wangyanyu1817. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Precharge controller board 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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