4 layers100 × 100 mm
Rpi pico printer board
jackw01/pi-pico-printer-board
Tinkerer-friendly Klipper compatible 3D printer control board using Raspberry Pi Pico
224 parts42CERN-OHL-W-2.0
4 layers58.4 × 28.8 mm
SSDV3
jnjoaquin/SSDV3A 12S battery eliminator circuit for UAS applications. Please see the UBCO Aerospace fork for the latest release.
- Size
- 58.4 × 28.8 mm
- Copper layers
- 4
- Thickness
- 1.59 mm
- Parts
- 69
- Nets
- 30
- Pads
- 275
- Tracks, vias
- 192, 195
- Pours
- 21
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 19 Sep 2025
- Updated
- 6 Feb 2026
Overview
SSDV3 is an open-source printed circuit board by jnjoaquin, from the jnjoaquin/SSDV3 repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 4-layer board of 58.4 × 28.8 mm with 69 parts on 30 nets, routed with 192 tracks and 195 vias.
It is built around the LM5146RGY, BSZ146N10LS5 and BAT46WS, with the SM02B-GHS-TB(LF)(SN) and SM03B-GHS-TB(LF)(SN) among its other parts. Its parts include 23 capacitors, 17 resistors, 8 connectors, 6 diodes and 3 transistors.
Main components
5
LM5146RGY
VQFN-20(3.5x4.5)-40℃~+150℃@(TJ) 1 1.8mA 1MHz 5.5V~100V 800mV~60V Adjustable Buck External Overcurrent Protection、Light load efficient mode、Adjustable soft-start、Operating status indication、Cycle-by-cycle current limiting、Adjustable current limiting、Frequency synchronization、Hiccup current limiting、Built-in LDO regulator、EMI optimization (spread spectrum) Step-down type Yes VQFN-20(3.5x4.5) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BSZ146N10LS5
TSDSON-8(3.3x3.3)TSDSON-8(3.3x3.3) MOSFETs ROHSInfineon TechnologiesMOSFETs
BAT46WS
SOD-323-55℃~+150℃ 100V 150mA 1V@250mA 2uA 350mA Independent SOD-323 Schottky Diodes ROHShongjiachengSchottky Diodes
SM02B-GHS-TB(LF)(SN)
SMD,P=1.25mm,卧贴-25℃~+85℃ 1 1.25mm 1A 1x2P 2 2P 4.13mm 4.25mm 5.75mm 50V Auxiliary Solder Pin GH PA9T Phosphor bronze Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1.25mm,Surface Mount，Right Angle Wire To Board Connector ROHSJSTWire To Board Connector
SM03B-GHS-TB(LF)(SN)
SMD,P=1.25mm,卧贴-25℃~+85℃ 1 1.25mm 1A 1x3P 3 3P 4.13mm 4.25mm 50V 7mm Auxiliary Solder Pin GH PA9T Phosphor bronze Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1.25mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
README
README.mdThis project has been migrated to the UBCO Aerospace Club 2025_SSDV3 fork.
The Super Step Down V3
The SSDV3 is an independently-made, non-isolated DC/DC converter designed for unmanned aerial systems (UAS). The module is intended for converting 50V battery input down to 5-12V output at a maximum load of 8A. It acts as a reliable battery-eliminator circuit (BEC) through effective regulation in the presence of large line voltage and load current transients.
Comparison with Last Super Step Down
This design is motivated by the challenges encountered by the UBCO Aerospace Club with their Jellyfish quadcopter when powering auxiliary electronics off the drone's main battery. Lessons were learned through a variety of integration failures, investigations, and validation testing, and these experiences informed the development of version 3 of the Super Step Down series.
Improvements from the previous version:
- Dramatically improved regulation during line and load transients
- Considerable footprint area reduction by 16.5%
- Configurable output voltages instead of a fixed 5V output
- Added ESD protection on inputs
- Features reverse polarity protection
- Uses direct solder pads instead of terminal block for output connection
Specifications
| Input Voltage | 20-60V |
| Max Transient Voltage | 100V (clamping starts at 70V) |
| Output Voltage(s) | 5.1V, 7.4V, 9.6V, 12V |
| Max Output Current* | 8A |
| Typical Efficiency | 88% |
| Est. Voltage Overshoot | 200mV |
Performance Curves
Voltage ripple at 5.1V Output
Transient response of 5.1V 0-5A Output
Efficiency Measurements
Copyright Notice
Copyright © Julian Joaquin 2026
Hardware Source Licensed under CERN-OHL-W version 2
Parts
69| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 22uF | Capacitor_SMD:C_1206_3216Metric | C18, C19, C20, C21, C22, C23 |
| 5 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C10, C13 |
| 5 | 4.7uF | Capacitor_SMD:C_1206_3216Metric | C5, C6, C7, C8, C9 |
| 4 | SolderPad | Connector_Wire:SolderWirePad_1x01_SMD_3x6mm | J1, J4, J5, J6 |
| 3 | 20k | Resistor_SMD:R_0603_1608Metric | R6, R8, R12 |
| 3 | BSZ146N10LS5 | Package_SON_JJ:Infineon_PG-TSDSON-8-26_3.3x3.3mm_P0.65mm_ThermalVias-D0.3mm | Q1, Q2, Q3 |
| 3 | MountingHole | MountingHole:ToolingHole_1.152mm | H1, H2, H3 |
| 2 | 1.5k | Resistor_SMD:R_0603_1608Metric | R1, R11 |
| 2 | 2.2 | Resistor_SMD:R_0603_1608Metric | R4, R9 |
| 2 | BAT46WS | Diode_SMD:D_SOD-323 | D2, D3 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | SolderPad | Connector_Wire:SolderWirePad_1x01_SMD_1.5x3mm | J2, J3 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 1.5nF | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 100uF | Capacitor_Tantalum_SMD:CP_EIA-7343-20_Kemet-V_HandSolder | C24 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 12k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 150k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R17 |
| 1 | 2.2uF | Capacitor_SMD:C_0805_2012Metric | C11 |
| 1 | 241802B92200G | Heatsink_JJ:24180xB9x200G | HS1 |
| 1 | 24k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 3.48k | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | 3.74k | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 4.7nF | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | 4.7uH | Inductor_SMD:L_Bourns_SRP1038C_10.0x10.0mm | L1 |
| 1 | 47nF | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 560 | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 6.81k | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 60V | Diode_SMD:D_SMF | D5 |
| 1 | 64V | Diode_SMD:D_SMB | D1 |
| 1 | 68pF | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | 7.4V | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | 8.2pF | Capacitor_SMD:C_0603_1608Metric | C14 |
| 1 | 8V | Package_TO_SOT_SMD:SOT-23-3 | D6 |
| 1 | 9.6V | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | GREEN | LED_SMD:LED_0805_2012Metric | D4 |
| 1 | LM5050-1 | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | LM5146 | Package_QFN_JJ:Texas_RGY0020B_EP_3.5x4.5mm_P0.5mm_ThermalVias-D0.3mm | U2 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1 |
| 1 | SM02B-GHS-TB(LF)(SN) | Connector_JST:JST_GH_SM02B-GHS-TB_1x02-1MP_P1.25mm_Horizontal | J7 |
| 1 | SM03B-GHS-TB(LF)(SN) | Connector_JST:JST_GH_SM03B-GHS-TB_1x03-1MP_P1.25mm_Horizontal | J8 |
Questions
How big is the SSDV3 PCB?
It measures 58.4 × 28.8 mm and has 4 copper layers, 1.59 mm thick.
What parts does the SSDV3 use?
69 parts, built around the LM5146RGY, BSZ146N10LS5, BAT46WS and SM02B-GHS-TB(LF)(SN). 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 SSDV3 KiCad files?
From the jnjoaquin/SSDV3 repository on GitHub, at the commit this page was made from: the board is kicad/SSDV3.kicad_pcb and its schematic kicad/SSDV3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SSDV3 design in my own project?
Its repository publishes it under the CERN-OHL-W-2.0 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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