2 layers10 × 25 mm
4 layers25 × 50 mm
CB350
Synthron/SY317178xx compatible Switching Regulator
- Size
- 25 × 50 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 56
- Nets
- 33
- Pads
- 124
- Tracks, vias
- 126, 52
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 11 Apr 2024
- Updated
- 4 May 2024
Overview
CB350 is an open-source printed circuit board by Synthron, from the Synthron/SY317 repository on GitHub. It is a 4-layer board of 25 × 50 mm with 56 parts on 33 nets, routed with 126 tracks and 52 vias.
Its parts include 17 resistors, 15 capacitors, 10 connectors, 2 ICs and 1 inductor. It belongs with the power boards of this library.
README
README.mdSwitching Power Supply Modules
SY317
78xx compatible Switching Regulator
- Input Voltage: 4.5V .. 24V
- Output Voltage: 1.1V .. 16V
- Output Current: 3A
- Switching Frequency: 500kHz
- Efficiency: 85-95%
- Output Ripple: <50mV
pincompatible to the popular 78xx series linear voltage regulators
Very small form factor at 10x25mm dimensions
CB350
High current Switching Regulator
- 12..24V Input
- 5V2, 6V2, 7V4 and 8V4 fixed output
- use solder bridge to select output voltage
- different resistor values for voltages given in schematic
- 12A of current!
Intended for Servo Control, featuring 4 Pin-Headers for Servo control
features pin header for additional SY317 module for an additional variable 3A output voltage
compact form factor at 25x50mm dimensions
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 47µ | Capacitor_SMD:C_1210_3225Metric | C1, C11, C12, C13, C14, C15 |
| 4 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C3, C5, C10 |
| 2 | GND | TestPoint:TestPoint_THTPad_4.0x4.0mm_Drill2.0mm | J2, J10 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H1, H2 |
| 2 | S | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5, J6 |
| 1 | eigene:ladder_4 | ||
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 154k | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 1n2 | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 200k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 27k | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 27k4 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 2R2 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 3k92 | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 3n9 | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 54k9 | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 560p | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | 562k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 5V | TestPoint:TestPoint_THTPad_2.5x2.5mm_Drill1.2mm | J3 |
| 1 | 5V2 | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | 5k6 | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 62k | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | 68k | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | 69k8 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 6V2 | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | 75k | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 7V4 | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP3 |
| 1 | 7k5 | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | 8V4 | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP4 |
| 1 | G | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J8 |
| 1 | GND | TestPoint:TestPoint_THTPad_2.5x2.5mm_Drill1.2mm | J4 |
| 1 | LOGO | eigene:logo | G*** |
| 1 | SIC471ED-T1-GE3 | eigene:VREG_SIC471ED-T1-GE3 | U1 |
| 1 | SRP1038AA-2R2M | Inductor_SMD:L_Bourns_SRP1038C_10.0x10.0mm | L1 |
| 1 | SY317 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | V+ | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J7 |
| 1 | V_In | TestPoint:TestPoint_THTPad_4.0x4.0mm_Drill2.0mm | J1 |
| 1 | V_Out | TestPoint:TestPoint_THTPad_4.0x4.0mm_Drill2.0mm | J9 |
The 53 most common of 56 parts.
Questions
How big is the CB350 PCB?
It measures 25 × 50 mm and has 4 copper layers, 1.61 mm thick.
What parts does the CB350 use?
56 parts. 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 CB350 KiCad files?
From the Synthron/SY317 repository on GitHub, at the commit this page was made from: the board is CB350/CB350.kicad_pcb and its schematic CB350/CB350.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CB350 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Synthron before reusing the design.
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