2 layers100 × 100 mm
Power Supply
adsehgal/Bench_Power_Supply
A design for a custom bench top power supply for prototyping.
19 parts2
2 layers100 × 50 mm
Power Supply
adsehgal/Bench_Power_Supply2A design for a custom bench top power supply for prototyping.
- Size
- 100 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 106
- Nets
- 65
- Pads
- 341
- Tracks, vias
- 560, 219
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20200909)
- Created
- 2 Aug 2020
- Updated
- 7 Oct 2022
Overview
Power Supply is an open-source printed circuit board by adsehgal, from the adsehgal/Bench_Power_Supply repository on GitHub. It is a 2-layer board of 100 × 50 mm with 106 parts on 65 nets, routed with 560 tracks and 219 vias.
It is built around the ATMEGA328PB-AU, CH340E and LM358, with the TPS54531DDAR, INA138NA and MIC5205-3.3YM5 among its other parts. Its parts include 35 capacitors, 25 resistors, 11 ICs, 9 diodes and 4 connectors. It belongs with the power boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
12
ATMEGA328PB-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 27 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Touch function TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
CH340E
MSOP-10150uA 20mA 2Mbps 3.3V、5V Transceiver USB 2.0 MSOP-10 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
TPS54531DDAR
SOIC-8-EP-40℃~+85℃@(TA) 1 3.5V~28V 570kHz 5A 800mV~26.04V Adjustable Buck Buck Built-in No SOIC-8-EP DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
INA138NA
SOT23-52.7V-36V, High-Side Measurement Current Shunt MonitorTexas InstrumentsUncategorisedMIC5205-3.3YM5
SOT-23-5-40℃~+85℃@(Ta) 1 150mA 200mV@(50mA) 20V 2uA 3.3V 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsMIC5205-5.0YM5
SOT-23-5-40℃~+125℃@(Tj) 1 150mA 180mV@(50mA) 20V 2uA 5V 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PCA9306D
SO-8-40℃~+105℃ 1 1.8V~5.5V 1V~3.6V 2 2Mbps Automatic direction detection、Output enable high-impedance Bidirectional Level translator Open-drain SMBus、I2C SO-8 Translators, Level Shifters ROHSNXP SemiconductorsTranslators, Level Shifters
CUS10S30
SOD-323Schottky DiodesDOWO
FDN335N
SOT-23-3-55℃~+150℃ 1 N-channel 1.5V 1.7A 20V 310pF 40pF 500mW 5nC@4.5V 70mΩ@4.5V N-Channel SOT-23-3 MOSFETs ROHSonsemiMOSFETs
BAT1000
SOT-23-40℃~+125℃ 1 Independent 100uA@30V 1A 40V 5.5A 500mV@1A SOT-23 Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
MF-PSMF020X-2
0805-40℃~+85℃ 200mA 20ms 3.5Ω 40A 500mA 650mΩ 9V 0805 Resettable Fuses ROHSBournsResettable Fuses
README
README.md
Bench Power Supply PCB
This repo contains project files for a bench top power supply I designed for my home lab.
Requirements:
- Small for crammed work spaces
- Adjustable and designed to store values on each power cycle
- 2 layer board - V2.0 bumped to 4 layer
- Digitally controlled - no mechanical parts
- Clear annunciators
- Uses an external AC-DC converter
- At least a 2A max load
- Cover most logic levels
- Possibly have preset buttons
Built With:
V1.0:
- KiCad - Schematic capture and layout V1.0
- VS Code | PlatformIO - Used to develop firmware V1.0
- Fusion 360 - Used to design 3-D models for packages
V2.0:
- Altium Designer - Schematic capture and layout V2.0
- STM32CubeIDE - Used to develop firmware V2.0
Notes:
- The PCB uses a 5/5mil DRC constraint
- The top of the PCB acts as the product face plate
Firmware Changes:
| Change Type | V 1.0 | V2.0 |
|---|---|---|
| MCU Architecture | 8-bit AVR | 32-bit ARM |
| User Input Handling | Polling | Interrupts |
| Analog Readings | Polling | DMA |
| Serial Communication | None | Added |
| Operating System | None | FREERTOS |
Hardware Changes:
| Change Type | V 1.0 | V2.0 |
|---|---|---|
| MCU Selection | ATMega 328p | STM32F401RB |
| Digi Pot | MCP4023 - Up/Down | MCP4018 - I2C |
| Inductor Seletion | 4.7µH - 7A | 4.7µH - 4A |
| PCB Stackup | 2-layer | 4-layer |
| User Input Buffer | None | Schmitt triggered |
| Analog Buffers | LM358 - Not RRIO | TLV271 - RRIO |
| MCU VDD | Not always on | Always On |
| OLED Reset | None | Added |
Authors
- Aditya Sehgal - PCB Layout, Firmware, 3-D Modelling - Adsehgal
Parts
106| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 100nF | Capacitor_SMD:C_0805_2012Metric | C2, C3, C6, C9, C10, C19, C20, C21, C22, C23, C24, C25, C27, C28, C35 |
| 9 | 10K | Resistor_SMD:R_0805_2012Metric | R3, R6, R8, R9, R10, R12, R17, R20, R24 |
| 6 | 1µF | Capacitor_SMD:C_0805_2012Metric | C11, C26, C29, C30, C31, C33 |
| 6 | CUS10S30 | Diode_SMD:D_SOD-323 | D4, D5, D6, D7, D8, D9 |
| 6 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3, TP4, TP5, TP6 |
| 5 | 4.7µF | Capacitor_SMD:C_0805_2012Metric | C4, C5, C16, C18, C32 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_ISO7380_Pad | H1, H2, H3, H4 |
| 3 | 14K | Resistor_SMD:R_0805_2012Metric | R16, R19, R23 |
| 3 | 1K | Resistor_SMD:R_0805_2012Metric | R21, R22, R25 |
| 3 | 22pF | Capacitor_SMD:C_0805_2012Metric | C14, C15, C17 |
| 3 | FDN335N | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 2 | 10nF | Capacitor_SMD:C_0805_2012Metric | C1, C8 |
| 2 | 10uF | Capacitor_SMD:C_Elec_5x5.4 | C7, C12 |
| 2 | 2.2K | Resistor_SMD:R_0805_2012Metric | R5, R14 |
| 2 | 330R | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 5.1K | Resistor_SMD:R_0805_2012Metric | R4, R11 |
| 2 | Conn_01x01 | Binding_Post:Binding_Post | J2, J3 |
| 2 | LM358 | Package_SO:MSOP-8_3x3mm_P0.65mm | U4, U11 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 0.01R | Resistor_SMD:R_1020_2550Metric | R13 |
| 1 | 16MHz | Crystal:Crystal_SMD_SeikoEpson_TSX3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 2.2nF | Capacitor_SMD:C_0805_2012Metric | C13 |
| 1 | 2.2µF | Capacitor_SMD:C_0805_2012Metric | C34 |
| 1 | 37.4K | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 390K | Resistor_SMD:R_0805_2012Metric | R15 |
| 1 | 4.7µH | Inductor_SMD:L_Bourns_SRR1260 | L1 |
| 1 | 500K | Resistor_SMD:R_0805_2012Metric | R18 |
| 1 | ATmega328PB-AU | Package_QFP:TQFP-32_7x7mm_P0.8mm | U2 |
| 1 | BAT1000 | Package_TO_SOT_SMD:TSOT-23 | D3 |
| 1 | CH340E | Package_SO:MSOP-10_3x3mm_P0.5mm | U7 |
| 1 | CL | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | DW | Button_Switch_SMD:SW_SPST_TL3342 | SW2 |
| 1 | INA138 | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | MCP4023-103ECH | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | MF-PSMF020X-2 | Fuse:Fuse_0805_2012Metric_Castellated | F1 |
| 1 | MIC5205-3.3YM5 | Package_TO_SOT_SMD:SOT-23-5 | U8 |
| 1 | MIC5205-5.0YM5 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | OUT | LED_SMD:LED_0805_2012Metric | D2 |
| 1 | O_EN | Button_Switch_SMD:SW_SPST_TL3342 | SW4 |
| 1 | PCA9306 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U9 |
| 1 | SSD1306_0.96in | Custom_Displays:SSD1306_0.96in | U10 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Altech:Altech_AK300_1x02_P5.00mm_45-Degree | J4 |
| 1 | TPS54531DDAR | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.514x3.2mm | U3 |
| 1 | UP | Button_Switch_SMD:SW_SPST_TL3342 | SW1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J5 |
| 1 | V_I_SEL | Button_Switch_SMD:SW_SPST_TL3342 | SW3 |
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The current maintainers of this repository are:
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Questions
How big is the Power Supply PCB?
It measures 100 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Power Supply use?
106 parts, built around the ATMEGA328PB-AU, CH340E, LM358 and TPS54531DDAR. 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 Power Supply KiCad files?
From the adsehgal/Bench_Power_Supply repository on GitHub, at the commit this page was made from: the board is V1.0/Hardware/DC_DC_Converter/KiCad_Project_Files/Power_Supply.kicad_pcb and its schematic V1.0/Hardware/AC_DC_Converter/KiCad_Project_Files/Power_Supply.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Power Supply design in my own project?
Its repository states no licence, so its author keeps all rights: ask adsehgal before reusing the design.