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Universal USB PD Lab Power Supply & Monitor

Overview

With USB Power Delivery (PD) and USB-C becoming the standard for powering mobile devices, especially due to new regulations in Europe, these power sources are now widely available. USB PD supports up to 48V and 5A in the near term, and currently, 21V and 3A power sources are commonly accessible. This system leverages these capabilities to offer a reliable, portable, and adjustable power supply, tailored to engineers' needs for fieldwork or on-the-go applications.

System Benefits:

  • Works with any USB-C power source, such as a laptop main adapter that includes an automatic power negotiation.
  • Provides 0-18V and 0-3A output, with an optional 4-wire method.
  • Features a simple UI via push button or capacitive touch (e.g., slider).
  • Includes an OLED display to set and measure the output voltage and current.
  • USB and virtual UART can be used to implement convenient PC software with a GUI.

Block Diagram

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EU209Connector Arrow.232Sheet.30Sheet.36Connector Arrow.126Connector Arrow.130Connector Arrow.116Connector Line.230Sheet.24Sheet.26Sheet.27Sheet.28Sheet.29Sheet.32Load SwitchLoad SwitchLoad SwitchOLED DisplayOLED DisplayOLED DisplayBi-directionalBi-directional.54Sheet.60Sheet.62Sheet.64Connector Arrow3.3V3.3V3.3V40Amax40mAmax40mAmaxUser LED(s)User LED(s)User LED(s)User Button(s)User Button(s) or CTSU*User Button(s) or CTSU*JTAGJTAGJTAGBi-directional.80MOSFETMOSFET x4MOSFET x4Buck-Boost ConverterBuck-Boost ConverterBuck-Boost ConverterDigital Power MonitorDigital Power MonitorDigital Power MonitorSheet.92OptionalOptionalConnector Arrow.96Sheet.98Connector 1.160.101Connector 1.160.102Sheet.117Connector Arrow.129Sheet.131Sheet.132Connector dotted line.135Sheet.133Sheet.134Connector dotted line.136Connector Arrow.154Connector Line.156Connector Line.157Connector Arrow.162Connector Line.165Out +, 0-18V, 0-3AOut +, 0-18V, 0-3AOut +, 0-18V, 0-3AGNDGNDGNDUSB-C ConnectorUSB-C ConnectorUSB-C Connector CC1CC1CC1CC2CC2CC2Connected signals line.177Connector Arrow.178Connector Arrow.1795, 9, 15, 20V5, 9, 15, 20V5, 9, 15, 20V3Amax3Amax3AmaxSheet.182VBusVBusConnector Line.183Connector Line.196USB PD ContollerUSB PD ContollerUSB PD ContollerMicro USB ConnectorMicro USB ConnectorMicro USB Connector Connector Arrow.200Connector dotted lineA/BA/BA/B A/BA/BA/B*RA4M1 MCU can be used in case of CTSU*RA4M1 MCU can be used in case of CTSU*RA4M1 MCU can be used in case of CTSUExternal USC-C/USB PD SourceExternal USB-C/USB PD SourceExternal USB-C/USB PD SourceConnector Arrow.211Sheet.212USB-C CableUSB-C CablePC + GUIPC + GUIPC+ GUIConnector dotted arrowSheet.217USB CableUSB CableEU209EU209EU209Bi-directional.221CrystalSheet.223Sheet.224Sheet.225Sheet.226Sheet.227Sheet.228Sheet.229Connector 1.160Connector 1.160.233Vertical Wire BundleLabel Text 10pt.104622Sheet.236Vertical Wire Bundle.237Label Text 10pt.104622Sheet.239Vertical Wire Bundle.240Label Text 10pt.10462..42..4Sheet.242Connector Arrow.246Connected signals lineVertical Wire Bundle.248Label Text 10pt.104622Sheet.250Connector 1.160.251ShuntSheet.253Sheet.254Sheet.255Vertical Wire Bundle.256Label Text 10pt.104699Sheet.258Shunt.259Sheet.260Sheet.261Sheet.262Shunt.263Sheet.264Sheet.265Sheet.266Connector LineConnector Line.276Connector Line.278Connector 1.160.279Diode - IR InfraredSheet.281Sheet.282Sheet.283Sheet.284Sheet.285Darlington.651Sheet.287Darlington.254GroundSheet.314Sheet.315Ground.331Sheet.332Sheet.333Sheet.334MCUMCU*MCU*VDDVDDVDDHS Osc.HS Osc.HS Osc.DebugDebugDebugGPIOGPIOGPIOUSBUSBUSBI2CI2CI2CGPIOGPIOGPIOSCISCISCIADCADCADCI2CI2CI2CADCADCADCADCADCADC

MCU

RA Arm Cortex-M MCUs

Load Switch

Load Switches

MOSFET

Power MOSFETs

USB PD Contoller

USB-C & Power Delivery

Buck-Boost Converter

Buck-Boost Controllers (External FETs)

Digital Power Monitor

Current Sense Amplifiers

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