DC-DC psu
About the DC-DC psu PCB
DC-DC psu is an open source STM32 PCB design by mirtcho, published on GitHub. It is a 2-layer board measuring 71.7 × 49.5 mm, with 38 components from 21 distinct parts.
Its main chip is the STM32G474CET6, from the STM32 family. Other key parts include the UCC25800, ISO1042DWV, TJA1462AT/0Z and CRE1S0305S3C. By type, the board carries 17 capacitors, 8 resistors, 6 ICs, 4 diodes and 2 connectors.
From the project
Kicad workspace /sandbox
Main components on the DC-DC psu
DC-DC psu bill of materials (BOM)
38 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | UCC25800 | HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm | U1, U3 |
| 1 | STM32G474CET6 | LQFP48-7x7mm | U2 |
| 1 | ISO1042DWV | DWV0008A | U4 |
| 1 | TJA1462AT/0Z | SO8_SOT96-1_NXP | U5 |
| 1 | CRE1S0305S3C | Converter_DCDC_Murata_CRE1xxxxxx3C_THT | U6 |
| 1 | RESET | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_TE_282834-3_1x03_P2.54mm_Horizontal | J2 |
| 1 | NX2016AB-32MHZ ST2 | NX2016AB_NDK | XTAL1 |
| 4 | PMEG6010CEH | D_SOD-123 | D1, D2, D3, D4 |
| 1 | 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 3 | 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C9, C10 |
| 4 | C | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C5, C7, C8 |
| 2 | C | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4, C6 |
| 3 | 1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11, C12, C15 |
| 2 | 6.8pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13, C14 |
| 1 | 2.2uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C16 |
| 1 | 10nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C17 |
| 1 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 2 | 0 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R8 |
| 2 | 60 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R7 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5, R6 |
DC-DC psu design files
The KiCad project lives in the mirtcho/Kicad repository on GitHub; these links point at the commit this page was built from.
- LayoutDC-DC_psu/DC-DC_psu.kicad_pcb
- SchematicDC-DC_psu/DC-DC_psu.kicad_sch
DC-DC psu: common questions
What microcontroller does the DC-DC psu use?
The DC-DC psu is built around the STM32G474CET6, from the STM32 family.
How big is the DC-DC psu PCB?
The DC-DC psu measures 71.7 × 49.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DC-DC psu?
38 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the DC-DC psu design files?
From the mirtcho/Kicad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the DC-DC psu design in my own project?
The repository has no license, so all rights stay with mirtcho. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the DC-DC psu without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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