2 layers37.6 × 102.9 mm
PDIST
michaelruppe/FSAE
Projects for Formula SAE Electric Vehicle competition (Australia 2019/2020)
48 parts59MIT
2 layers133 × 98 mm
Precharge
michaelruppe/FSAE59Projects for Formula SAE Electric Vehicle competition (Australia 2019/2020)
- Size
- 133 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 121
- Nets
- 72
- Pads
- 347
- Tracks, vias
- 1,657, 25
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 12 Aug 2019
- Updated
- 2 Apr 2026
Overview
Precharge is an open-source printed circuit board by michaelruppe, from the michaelruppe/FSAE repository on GitHub, published under the MIT licence. It is a 2-layer board of 133 × 98 mm with 121 parts on 72 nets, routed with 1,657 tracks and 25 vias.
It is built around the SPAN02A-12, TJA1051T/3/1 and LM2904, with the LM1117-5.0, LM393 and BZX84C12 among its other parts. Its parts include 49 resistors, 23 capacitors, 12 diodes, 11 ICs and 3 transistors. It belongs with the NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
10
SPAN02A-12
SIP,21.8x9.2mm1 12V 167mA 83% 9V~18V SIP,21.8x9.2mm Power Module/Power Supply ROHSMWDC-DC Power ModulesTJA1051T/3/1
-- CAN Transceivers ROHSNXP SemiconductorsCAN Transceivers
LM2904
SOP-8-15V~-1.5V、1.5V~15V 0℃~+70℃ 1MHz 2 2mV 3V~30V 3nA 40mA 45nA 500uA 85dB SOP-8 Operational Amplifier ROHSGOODWORKOperational Amplifier
LM1117-5.0
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 5V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorisedLM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparators
BZX84C12
SOT-23Zener DiodeshongjiachengBZX84C3V3
SOT-23Zener DiodeshongjiachengHSA25390RJ
插件25W 390Ω Wirewound Resistor ±30ppm/℃ ±5% 插件 Aluminum Case/Porcelain Tube Resistance ROHSTE ConnectivityAluminum Case/Porcelain Tube ResistanceMMBT3906
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200mA 200mW 300MHz 300mV 40V 5V PNP SOT-23 Bipolar (BJT) ROHSTWGMCBipolar (BJT)
TFPT1206L1002FM
1206-55℃~+125℃ 0.55mm 1.5mm 10kΩ 125mW 3.05mm 50V ±1% 1206 PTC Thermistors ROHSVishay IntertechnologyPTC Thermistors
README
README.mdFSAE
Hardware projects for the FSAE Electric 2019/2020 competition (Australia). 💻Github https://github.com/michaelruppe/FSAE
Resources
Team mentoring and design reviews available - contact through michaelruppe.com
ShutdownCircuit.com is a free resource to help new FSAE EV teams shortcut the growing pains of designing EV safety systems.
TSAL
A light that indicates presence of dangerous voltage within the Tractive System
The third iteration of the TSAL driver.
Watch a video walkthrough explaining the circuit operation and design decision.
Precharge
A device to precharge the Tractive System. This prototype features voltage feedback to protect AIRs. In open-loop systems, if a wiring fault develops - eg. precharge resistor is disconnected - then the precharge is ineffective and AIRs may become damaged.
The prototype Precharge module
HFL (Hard Fault Latch)
Latches momentary faults that are required to shutdown the EV.
Parts
121| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C11, C12, C15, C16, C17, C18, C19, C20, C21, C22, C23 |
| 10 | 510k | Resistor_SMD:R_1206_3216Metric | R31, R32, R33, R34, R36, R37, R38, R40, R41, R42 |
| 8 | 10k | Resistor_SMD:R_1206_3216Metric | R8, R21, R26, R27, R29, R44, R45, R48 |
| 6 | MountingHole_3.2mm_M3 | MountingHole:MountingHole_3.2mm_M3 | MT1, MT2, MT3, MT4, MT5, MT6 |
| 6 | TestPoint | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm_LowProfile | TP1, TP2, TP3, TP4, TP5, TP6 |
| 5 | D | Diode_SMD:D_SMA | D1, D7, D8, D9, D12 |
| 4 | 100k | Resistor_SMD:R_1206_3216Metric | R20, R22, R25, R28 |
| 4 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C3, C8, C9, C10 |
| 4 | 200 | Resistor_SMD:R_1206_3216Metric | R2, R3, R4, R5 |
| 4 | 220u | Capacitor_SMD:C_Elec_6.3x5.4 | C4, C5, C6, C7 |
| 4 | 6k8 | Resistor_SMD:R_1206_3216Metric | R7, R10, R23, R24 |
| 4 | LED | LED_SMD:LED_0805_2012Metric_Castellated | D2, D3, D4, D5 |
| 3 | 4N35 | Package_DIP:SMDIP-6_W7.62mm | U5, U6, U11 |
| 3 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3 |
| 2 | 10n | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C13, C14 |
| 2 | 12k | Resistor_SMD:R_1206_3216Metric | R13, R17 |
| 2 | 1k5 | Resistor_SMD:R_1206_3216Metric | R11, R12 |
| 2 | 20k | Resistor_SMD:R_1206_3216Metric | R6, R9 |
| 2 | 220 | Resistor_SMD:R_1206_3216Metric | R19, R47 |
| 2 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1, Q3 |
| 2 | 39k | Resistor_SMD:R_1206_3216Metric | R39, R43 |
| 2 | 47 | Resistor_SMD:R_1206_3216Metric | R14, R16 |
| 2 | 560 | Resistor_SMD:R_1206_3216Metric | R15, R18 |
| 2 | BZX84C12 | Diode_SMD:D_SOT-23_ANK | D10, D11 |
| 2 | LM331 | Package_DIP:DIP-8_W7.62mm | U7, U8 |
| 1 | 0 | Resistor_SMD:R_1206_3216Metric | R49 |
| 1 | 160 | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 2k2 | Resistor_SMD:R_1206_3216Metric | R35 |
| 1 | 500k | Resistor_SMD:R_1206_3216Metric | R30 |
| 1 | BZX84C3V3 | Diode_SMD:D_SOT-23_ANK | D6 |
| 1 | G7L-2A-X-L | Precharge:G7L-2A-X-L | K2 |
| 1 | HSA25390RJ | Precharge:Chassis_Resistor_TE_Connectivity_HSA25 | R46 |
| 1 | LM1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | LM2904 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U9 |
| 1 | LM393 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 1 | LOGO | Precharge:logo | G*** |
| 1 | LOGO | Precharge:electric-shock-symbol | G*** |
| 1 | MMBT3906 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Micro-Fit 43045-0212 | Connector_Molex:Molex_Micro-Fit_3.0_43045-0212_2x01_P3.00mm_Vertical | J3 |
| 1 | MicroFit | Connector_Molex:Molex_Micro-Fit_3.0_43045-0812_2x04_P3.00mm_Vertical | J1 |
| 1 | Mini-Fit_Jr_5566-04A | Mini-Fit-Jr-4.20mm-pitch:Molex-Mini-Fit-Jr-4-pin-P4.2mm-RowP4.2mm | J2 |
| 1 | OMRON-G2RL-24 | Precharge:OMRON-G2R-24 | K1 |
| 1 | SPAN02A-12 | Precharge:SPAN02 | U2 |
| 1 | TFPT1206L1002FM | Resistor_SMD:R_1206_3216Metric | TH1 |
| 1 | TJA1051T-3 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | Teensy4.0 | teensy:Teensy40 | U3 |
Questions
How big is the Precharge PCB?
It measures 133 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Precharge use?
121 parts, built around the SPAN02A-12, TJA1051T/3/1, LM2904 and LM1117-5.0. 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 Precharge KiCad files?
From the michaelruppe/FSAE repository on GitHub, at the commit this page was made from: the board is Precharge/Precharge/Precharge.kicad_pcb and its schematic TSALv3/TSALv3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Precharge design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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