4 layers
Real Power double5V
CUSail-Navigation/PCB-FA25-SP26
This is a repository containing the PCBs designed during the FA25-SP26 academic year. Due to high compatibility and relative ease of use, all of these files are made with KiCad.
89 parts
4 layers96 × 125.6 mm
PowerDistributionPCB
CUSail-Navigation/PCB-FA25-SP26This is a repository containing the PCBs designed during the FA25-SP26 academic year. Due to high compatibility and relative ease of use, all of these files are made with KiCad.
- Size
- 96 × 125.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 93
- Nets
- 104
- Pads
- 301
- Tracks, vias
- 260, 179
- Pours
- 34
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Sep 2025
- Updated
- 19 Sep 2026
Overview
PowerDistributionPCB is an open-source printed circuit board by CUSail-Navigation, from the CUSail-Navigation/PCB-FA25-SP26 repository on GitHub. It is a 4-layer board of 96 × 125.6 mm with 93 parts on 104 nets, routed with 260 tracks and 179 vias.
It is built around the AP63203WU, TPS56A37RPAR and TPSM84338RCJR, with the MMBT2222A, AOD4185 and SS14 among its other parts. Its parts include 14 resistors, 10 capacitors, 10 diodes, 9 transistors and 4 switches. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
7
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC ConvertersTPS56A37RPAR
VQFN-HR-10(3x3)-40℃~+150℃@(TJ) 1 10A 4.5V~28V 45uA 500kHz 600mV~13V Adjustable Buck Buck Built-in VQFN-HR-10(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPSM84338RCJR
QFN-9_3.3x4.5mm-40℃~+125℃ 1 200kHz~2.2MHz 28uA 3.8V~28V 3A 600mV~17V Adjustable Buck Built-in Overcurrent Protection、Light load efficient mode、Adjustable soft-start、Operating status indication、Cycle-by-cycle current limiting、Frequency synchronization、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes QFN-FCMOD-9 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
MMBT2222A
SOT-23-55℃~+150℃ 1 NPN 100 100nA 1V 300MHz 300mW 40V 600mA 6V NPN Standalone SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
AOD4185
TO-252(DPAK)-55℃~+175℃ 1 P-Channel 15mΩ@10V 190pF 2.55nF 280pF 3V 40A 40V 55nC@10V 62.5W P-Channel TO-252(DPAK) MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
XT30PW-M
-- Power connector / plug connector ROHSChangzhou Amass ElecUncategorised
README
README.mdCUSail FA25-SP26 PCB Suite
Here are the files for the three main PCBs designed during the FA25-SP26 academic year. These were all designed with KiCad due to its support across all operating systems and our use cases not requiring more sophisticated PCB design tools.
These PCBs were designed with the idea that the boat would contain two electronics boxes - one for digital electronics, and the other for power electronics. The decision to split them was made because it is unlikely that one would need to work on both simultaneously (thus making the electronics physically easier to work with), reduces cable clutter, and reduces the likelihood of every part of the system getting drenched in water in the event that the boat capsizes.
Electronics PCB
This PCB houses the digital electronics found on the boat. This includes the main microcontroller(s), sensors, radio transmitters/recievers, and interfaces to other parts of the boat which rely on computations. This PCB sits in the digital electronics box.
Power Distribtuion PCB
This PCB contains the circuitry necessary for stepping down and distributing power supplied from our 22.2V LiPo battery. This PCB sits in the power electronics box.
Battery Management System PCB
Because we use a LiPo battery, battery failure is possible of the battery discharges too much. This PCB is responsible for monitoring the state of the battery and cutting power in the event that it discharges too much. This PCB is housed in the power electronics box.
Parts
93| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | LOGO | LOGO | G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G***, G*** |
| 8 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D2, D3, D4, D5, D6, D7, D8, D10 |
| 8 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R5, R6, R7, R11, R15, R16 |
| 8 | MMBT2222A | Package_TO_SOT_SMD:SOT-23 | Q2, Q6, Q7, Q8, Q9, Q10, Q11, Q12 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | RT314F05(gen) | CUSail:RT314F05 | K1, K2, K3, K4 |
| 3 | 10µF | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1b1, Cin1, Cin2 |
| 3 | 22µF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | Cout1b1, Cout2b1, Cout3b1 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3a1, R3b1 |
| 2 | 100nF | Capacitor_SMD:C_0402_1005Metric | C2b1, Cboot1 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 10kΩ | Resistor_SMD:R_0201_0603Metric_Pad0.64x0.40mm_HandSolder | Rfbb1, Rfbb2 |
| 2 | 22µF | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | Cout1a1, Cout2a1 |
| 2 | 22µF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4 |
| 1 | 0.1µF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | 1.8kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 100kΩ | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | Rpg1 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | Cinx1 |
| 1 | 100µF | CUSail:WCAP-PSLP_6.3X7.7_DXL_ | Main_Bulk |
| 1 | 10µF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 150pF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | Cff1 |
| 1 | 18kΩ | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | Rmode1b1 |
| 1 | 191kΩ | Resistor_SMD:R_0201_0603Metric_Pad0.64x0.40mm_HandSolder | Rfbt2 |
| 1 | 1kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 22nF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | Css1 |
| 1 | 3.3µH | Inductor_SMD:L_Coilcraft_XAL7070-XXX | L1a1 |
| 1 | 4.7µH | CUSail:VLS4012 | L1b1 |
| 1 | 470u | Capacitor_SMD:CP_Elec_8x10.5 | C5 |
| 1 | 484050003 | CUSail:CONN_484050003_MOL | USB_Connect1 |
| 1 | 52.3kΩ | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | Rmode1a1 |
| 1 | 73.2kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | Rfbt1 |
| 1 | AOD4185 | CUSail:AOD4185 | Q1 |
| 1 | AP63203WU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | Arduino_Nano_v3.x | Module:Arduino_Nano | A1 |
| 1 | Conn_02x02_Counter_Clockwise | Connector_Molex:Molex_Mini-Fit_Jr_5566-04A_2x02_P4.20mm_Vertical | 3.3V_OUT1 |
| 1 | Conn_02x03_Counter_Clockwise | Connector_Molex:Molex_Mini-Fit_Jr_5566-06A_2x03_P4.20mm_Vertical | 5V_OUT1 |
| 1 | Conn_02x04_Counter_Clockwise | Connector_Molex:Molex_Mini-Fit_Jr_5566-08A_2x04_P4.20mm_Vertical | 12V_OUT1 |
| 1 | MMSZ5242BS-7-F | CUSail:MMSZ5242BS-7-F | D1 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1 |
| 1 | SS14 | Diode_SMD:D_SMA | D9 |
| 1 | TPS56A37RPAR | CUSail:RPA0010A-MFG | 5V1 |
| 1 | TPSM84338RCJR | CUSail:buck_correct | 12V |
| 1 | XT30PW-M | CUSail:XT30PW-M | 22V_BATT_IN |
| 1 | ~ | CUSail:XBee | XBee1 |
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Questions
How big is the PowerDistributionPCB PCB?
It measures 96 × 125.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the PowerDistributionPCB use?
93 parts, built around the AP63203WU, TPS56A37RPAR, TPSM84338RCJR and MMBT2222A. 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 PowerDistributionPCB KiCad files?
From the CUSail-Navigation/PCB-FA25-SP26 repository on GitHub, at the commit this page was made from: the board is PowerDistributionPCB/PowerDistributionPCB.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PowerDistributionPCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask CUSail-Navigation before reusing the design.