2 layers56 × 85 mm
2 layers100 × 50 mm
OpenPSU
mrkindustries/openPSU41An open source linear power supply unit for hobbyists and professionals
- Size
- 100 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 88
- Nets
- 34
- Pads
- 4,916
- Tracks, vias
- 575, 117
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 24 Dec 2014
- Updated
- 10 Nov 2021
Overview
OpenPSU is an open-source printed circuit board by mrkindustries, from the mrkindustries/openPSU repository on GitHub. It is a 2-layer board of 100 × 50 mm with 88 parts on 34 nets, routed with 575 tracks and 117 vias.
It is built around the MC34071D, ADR02ARZ and BC846B, with the BC857A, BCP54 and SS1200-LTP among its other parts. Its parts include 29 resistors, 15 diodes, 13 capacitors, 3 ICs and 3 transistors.
Main components
6
MC34071D
SOIC-80℃~+70℃ 1 1.9mA 100nA 10uV/℃ 13V/us 30mA 32nV/√Hz@1kHz 3V~44V 4.5MHz 5mV 6nA 97dB ESD protection SOIC-8 Operational Amplifier ROHSonsemiOperational AmplifierADR02ARZ
SOIC-8Voltage ReferenceAnalog Devices
BC846B
SOT-23-65℃~+150℃ 1 NPN 100MHz 100mA 200 200mV 250mW 5uA 65V 6V NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)BC857A
SOT-23-65℃~+150℃ 1 PNP 100MHz 100mA 125 15nA 250mW 300mV 45V 5V PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
BCP54
SOT-223-65℃~+150℃ 1 NPN 1.33W 100nA 130MHz 1A 45V 500mV 5V 63 NPN SOT-223 Bipolar (BJT) ROHSShikuesBipolar (BJT)
SS1200-LTP
SMA-50℃~+150℃ 1 Independent 1A 200V 30A 50uA@200V 920mV@1A SMA Schottky Diodes ROHSMicro Commercial ComponentsSchottky Diodes
README
hardware/design/README.mdNotes
-
Designed using kicad version 2014-08-24 BZR 5093. Older versions (like 2013-ish) will open the schematic but could fail to load the kicad-pcb file.
-
3D models come from http://smisioto.no-ip.org/elettronica/kicad/kicad.htm
-
BOM was chosen based on digikey stock, automatically generated by a kicad python script
Parts
88| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 4.7R 1W | Resistors_SMD:R_2010 | R7, R10, R24, R25, R26, R27, R28, R29, R30, R31 |
| 5 | 100nF | Capacitors_SMD:C_0805 | C4, C5, C10, C12, C13 |
| 5 | 1N4148 | Mrk:SOD-123 | D5, D6, D9, D10, D13 |
| 4 | 1k 1/4W | Resistors_SMD:R_0805 | R4, R15, R16, R22 |
| 4 | MH | Mounting_Holes:MountingHole_4mm | MH1, MH2, MH3, MH4 |
| 4 | S3G-13-F | Diodes_SMD:Diode-SMC_Standard | D1, D2, D3, D4 |
| 3 | H | Socket_Strips:Socket_Strip_Straight_1x01 | CONN_LED1, POT_I1, POT_V1 |
| 3 | L | Socket_Strips:Socket_Strip_Straight_1x01 | CONN_LED2, POT_I3, POT_V3 |
| 2 | 100pF | Capacitors_SMD:C_0805 | C6, C9 |
| 2 | 10k 1/4W | Resistors_SMD:R_0805 | R20, R21 |
| 2 | 2.2k 1/4W | Resistors_SMD:R_0805 | R9, R19 |
| 2 | 27k 1/4W | Resistors_SMD:R_0805 | R8, R11 |
| 2 | 33k 1/4W | Resistors_SMD:R_0805 | R13, R18 |
| 2 | 47uF 100v | Capacitors_ThroughHole:Capacitor10x16RM5 | C2, C7 |
| 2 | AC | Wire_Pads:SolderWirePad_single_2mmDrill | CONN1, CONN2 |
| 2 | MC34071 | SMD_Packages:SOIC-8-W | U2, U3 |
| 2 | W | Socket_Strips:Socket_Strip_Straight_1x01 | POT_I2, POT_V2 |
| 1 | 1.5k 1/4W | Resistors_SMD:R_0805 | R14 |
| 1 | 10000uF 50v | Capacitors_ThroughHole:Capacitor30x51RM10 | C1 |
| 1 | 10A | Fuse_Holders_and_Fuses:Fuseholder5x20_horiz_open_universal_Type-III | F1 |
| 1 | 10uF | Capacitors_SMD:C_0805 | C11 |
| 1 | 180R 1/4W | Resistors_SMD:R_0805 | R17 |
| 1 | 2.2k 1W | Resistors_SMD:R_2512 | R1 |
| 1 | 220R 1/4W | Resistors_SMD:R_0805 | R3 |
| 1 | 330pF | Capacitors_SMD:C_0805 | C8 |
| 1 | 47uF | Capacitors_SMD:C_0805 | C3 |
| 1 | 56k 1/4W | Resistors_SMD:R_0805 | R12 |
| 1 | 6.8v ZENER | Transistors_SMD:sot23 | D7 |
| 1 | 6.8v ZENER | SMD_Packages:SOT-23 | D14 |
| 1 | 820R 1/4W | Resistors_SMD:R_0805 | R23 |
| 1 | 82R 1/4W | Resistors_SMD:R_0805 | R2 |
| 1 | ADR02ARZ | SMD_Packages:SOIC-8-W | U1 |
| 1 | B | Wire_Pads:SolderWirePad_single_2mmDrill | CONN8 |
| 1 | BC846B | SMD_Packages:SOT-23 | Q1 |
| 1 | BC857A | SMD_Packages:SOT-23 | Q3 |
| 1 | BCP54 | SMD_Packages:SOT-223 | Q2 |
| 1 | BLOWN | LEDs:LED-0805 | D8 |
| 1 | C | Wire_Pads:SolderWirePad_single_2mmDrill | CONN7 |
| 1 | E | Wire_Pads:SolderWirePad_single_2mmDrill | CONN9 |
| 1 | GND | Wire_Pads:SolderWirePad_single_2-5mmDrill | CONN4 |
| 1 | Monitor | Socket_Strips:Socket_Strip_Straight_1x03 | P3 |
| 1 | OVERCURRENT | LEDs:LED-0805 | D12 |
| 1 | SHUNT+ | Socket_Strips:Socket_Strip_Straight_1x01 | CONN6 |
| 1 | SHUNT- | Socket_Strips:Socket_Strip_Straight_1x01 | CONN5 |
| 1 | SS1200-LTP | Diodes_SMD:Diode-SMA_Standard | D11 |
| 1 | TVS | Diodes_SMD:Diode-SMB_Standard | D15 |
| 1 | V+ | Wire_Pads:SolderWirePad_single_2-5mmDrill | CONN3 |
| 1 | VAL** | Symbols:Symbol_OSHW-Logo_SilkScreen_BIG | Symbol_OSHW-Logo_SilkScreen_BIG |
| 1 | mrkindustries_logo_20 | Mrk Industries:MrkIndustries_logo_Mask_20 | G*** |
Questions
How big is the OpenPSU PCB?
It measures 100 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the OpenPSU use?
88 parts, built around the MC34071D, ADR02ARZ, BC846B and BC857A. 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 OpenPSU KiCad files?
From the mrkindustries/openPSU repository on GitHub, at the commit this page was made from: the board is hardware/design/openPSU.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenPSU design in my own project?
Its repository states no licence, so its author keeps all rights: ask mrkindustries before reusing the design.
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