2 layers128 × 80 mm
2 layers75 × 46 mm
PowerInput
tom-biskupic/LabPSU33Open Source Lab Power Supply
- Size
- 75 × 46 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 12
- Pads
- 32
- Tracks, vias
- 71, 0
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 15 Dec 2015
- Updated
- 15 Feb 2022
Overview
PowerInput is an open-source printed circuit board by tom-biskupic, from the tom-biskupic/LabPSU repository on GitHub. It is a 2-layer board of 75 × 46 mm with 12 parts on 12 nets, routed with 71 tracks and 0 vias.
It is built around the BC547. Its parts include 5 connectors, 3 resistors, 2 transistors and 2 switches. It belongs with the power boards of this library.
Main components
1README
README.mdLabPSU
Open Source Lab Power Supply
This project is to create an open source modular lab power supply. The power supply is designed to:
- Provide between 0-15V @ 5A and 15-30V @ 3A
- Provide current limiting
- Voltage to be settable to within 1mV and current limit to 1mA resolution.
- Voltage/current readback to 1mV and 1mA with low temperature drift.
- Limit heat loss through the use of a pre-regulator. The pre-regulator uses an SCR and MOSFET arrangement to reduce noise (switches at a low frequency)
- Digitally controllable via a Raspberry PI and touch-screen interface.
- Multiple channels (designed for 3).
- Each channel is isolated and can be paralleled or put in series.
- Each channel uses its own torroidal transformer.
A Blog documenting the development of the project can be found here http://wahz.blogspot.com.au/2015/03/lab-power-supply-project.html
The major components used in the project are:
- IRFP044N N-channel MOSFET as the pass device. http://www.irf.com/product-info/datasheets/data/irfp044n.pdf
- IRF5210 P-channel MOSFET used to switch the input in the pre-regulator http://www.irf.com/product-info/datasheets/data/irf5210.pdf
- MCR-100 SCR http://www.onsemi.com/pub_link/Collateral/MCR100-D.PDF
- LT1639 Op Amps used in the control loop. http://www.linear.com/product/LT1639
- LT1716 Comparator used in the pre-regulator http://cds.linear.com/docs/en/datasheet/1716fa.pdf
- LTC2050 Op Amp used for current sense amplifier. http://www.linear.com/product/LTC2050
- AD5689R DAC with built in 2ppm/degree reference as main output voltage/current DAC. http://www.analog.com/media/en/technical-documentation/data-sheets/AD5689_5687.pdf
- AD7705 ADC used to read output voltage/current http://www.analog.com/media/en/technical-documentation/data-sheets/AD7705_7706.pdf
- ATMEGA328P Used as the main controller
- ADUM1201 dual channel isolator used to isolate the USB interface from the rest of the module http://www.analog.com/media/en/technical-documentation/data-sheets/ADuM1200_1201.pdf
- MCP2200 USB to serial converter http://www.microchip.com/wwwproducts/devices.aspx?dDocName=en546923
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | CONN_01X02 | wcon:WCON-2PIN | P1, P2, P3, P4 |
| 2 | 1K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R2, R3 |
| 2 | BC547 | TO_SOT_Packages_THT:TO-92_Inline_Narrow_Oval | Q1, Q2 |
| 2 | FSS1-102Z | FSS1-102Z:FSS1-102Z | K1, K2 |
| 1 | 100R | Resistors_ThroughHole:Resistor_Ceramic_Horizontal_L50mm-W14mm-H13mm-p60mm | R1 |
| 1 | CONN_01X04 | PinHead1-4:PINHeader1-4 | P5 |
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Questions
How big is the PowerInput PCB?
It measures 75 × 46 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PowerInput use?
12 parts, built around the BC547. 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 PowerInput KiCad files?
From the tom-biskupic/LabPSU repository on GitHub, at the commit this page was made from: the board is KiCAD/PowerInput/PowerInput.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PowerInput design in my own project?
Its repository states no licence, so its author keeps all rights: ask tom-biskupic before reusing the design.