4 layers70 × 70 mm
FreeEEG32-alpha131
neuroidss/FreeEEG32-alpha131
https://hackaday.io/project/181683-freeeeg32-alpha131
124 parts4AGPL-3.0
4 layers100 × 100 mm
Three Half Bridges
powermax555/Three-Half-Bridges3Half bridge module for use in larger power conversion and motor control systems
- Size
- 100 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 156
- Nets
- 106
- Pads
- 537
- Tracks, vias
- 1,176, 499
- Pours
- 19
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Sep 2020
- Updated
- 26 Mar 2025
Overview
Three Half Bridges is an open-source printed circuit board by powermax555, from the powermax555/Three-Half-Bridges repository on GitHub. It is a 4-layer board of 100 × 100 mm with 156 parts on 106 nets, routed with 1,176 tracks and 499 vias.
It is built around the SN6505BDBV and BAT54SW. Its parts include 48 capacitors, 36 resistors, 19 ICs, 13 diodes and 10 connectors. It belongs with the interfaces and adapters boards of this library.
Main components
2README
README.mdThree Half Bridges
Three Half Bridges project is intended to be a universal(ish) module for use in larger power conversion and motor control systems. This PCB aims to create a reasonably universal half bridge driver that can be used for medium to high power (100W to 1kW) electrical systems, such as power converters (buck converter, forward converter, LC or LLC converter, etc) motor drivers, etc. As such it is fairly bare-bones and additional components may need to be added external to this PCB for a particular system.
Digital isolator ICs are used for providing isolated gate drive signals and pretty much any generic low-side gate driver can be used for the actual gate driver ICs. I found some cheapies on LCSC for less than a dollar that claim 4A source and sink per channel, and each channel is paralell so in theory 8A source and sink is achievable. Note that there is no logic to prevent shoot-through, as the user inputs each high and low switch independently. Use a TL494 style flip flop based pulse steering network or my Dead Time Insertion PCB to implement this logic from a single ended square wave.
Notes: The end-user is responsible for selecting the exact componts used for this PCB design. (i.e. MOSFET or IGBT choice, choice of gate driver IC, value of capcitors, etc)
Licensed under the MIT License (https://mit-license.org/)
I was really drunk when I wrote this. Please consider buyin gm e more beerrs so I caan contune edevelopment thnaks!
Parts
156| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 1u | Capacitor_SMD:C_0603_1608Metric | C12, C13, C14, C15, C16, C23, C24, C25, C26, C27, C28, C30, C38, C39, C41, C47 +5 |
| 12 | 100n | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C8, C17, C20, C21, C31, C42, C43, C44, C52 |
| 12 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R12, R13, R19, R20, R28, R29, R35, R36, R44, R45 |
| 12 | 2.2 | Resistor_SMD:R_1206_3216Metric | R15, R16, R17, R18, R31, R32, R33, R34, R47, R48, R49, R50 |
| 12 | 220 | Resistor_SMD:R_0603_1608Metric | R9, R10, R11, R14, R25, R26, R27, R30, R41, R42, R43, R46 |
| 6 | 100n | Capacitor_SMD:C_1812_4532Metric | C18, C19, C22, C32, C35, C36 |
| 6 | 1n | Capacitor_SMD:C_0603_1608Metric | C7, C9, C10, C11, C45, C46 |
| 6 | ADuM121N | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4, U5, U9, U10, U18, U19 |
| 6 | D_Zener | Diode_SMD:D_SOD-123 | Z1, Z2, Z21, Z22, Z32, Z33 |
| 6 | LED | LED_SMD:LED_0805_2012Metric | D9, D10, D19, D20, D30, D31 |
| 6 | Q_NIGBT_GCE | three_half_bridges:TO-247-3-Nogloryhole_Horizontal_TabUp | Q3, Q4, Q5, Q6, Q7, Q8 |
| 6 | SO8 GATE DRVR | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U11, U12, U13, U14, U15, U22 |
| 5 | Conn_01x01_Socket | Library:AMT0450028DB0000G | J5, J6, J7, J8, J9 |
| 4 | BAT54SW | Package_TO_SOT_SMD:SOT-323_SC-70 | D1, D2, D3, D4 |
| 4 | EPC3668G | Transformer_SMD:Pulse_PA2004NL | TR1, TR2, TR3, TR4 |
| 4 | MC78L05_SOT89 | Package_TO_SOT_SMD:SOT-89-3 | LR1, LR8, LR11, LR12 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H7, H8 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_5.5mm_Pad_Via | H3, H4, H5, H6 |
| 4 | SN6505BDBV | Package_TO_SOT_SMD:SOT-23-6 | U3, U6, U7, U8 |
| 3 | ACS730xLCTR-50AB | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U17 |
| 3 | Conn_01x06_Pin | Connector_Molex:Molex_PicoBlade_53047-0610_1x06_P1.25mm_Vertical | J1, J2, J3 |
| 3 | FAST 1A DIODE | Diode_SMD:D_SOD-128 | D6, D7, D8 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | C_Polarized | Capacitor_Tantalum_SMD:CP_EIA-6032-20_AVX-F | C1 |
| 1 | Conn_01x02_Pin | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J10 |
| 1 | Current Sense | Connector_Molex:Molex_PicoBlade_53047-0810_1x08_P1.25mm_Vertical | J4 |
| 1 | Fan_4pin | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | M1 |
| 1 | LOGO | PM art:PM_art | G*** |
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Questions
How big is the Three Half Bridges PCB?
It measures 100 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Three Half Bridges use?
156 parts, built around the SN6505BDBV and BAT54SW. 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 Three Half Bridges KiCad files?
From the powermax555/Three-Half-Bridges repository on GitHub, at the commit this page was made from: the board is three_half_bridges.kicad_pcb and its schematic buck-converter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Three Half Bridges design in my own project?
Its repository states no licence, so its author keeps all rights: ask powermax555 before reusing the design.