100 W USB PD sink power controller provides flexible management and protection features


STUSB4500 from STMicroelectronics can operate in stand-alone mode with no need for a microcontroller

The STUSB4500 from STMicroelectronics is a USB Power Delivery (PD) controller which provides robust and flexible management of devices sinking up to 100 W at 20 V/5 A.


The STUSB4500 gives designers the flexibility to use a USB channel as a power source without the need for a microcontroller. The device implements a proprietary algorithm which allows the negotiation of a power delivery contract with a source in auto-run mode, without an MCU. The STUSB4500 stores up to three customizable power data object (PDO) profile configurations in an integrated non-volatile memory. The power profile can also optionally be customized by the application’s microcontroller – an open source library of code for this is available.


The controller is compliant with the USB PD 2.0 specifications, and with the USB Type-C™ rev 1.2 standard. The device supports the USB PD standard dead battery mode, which means that sink devices may be powered from a dead battery state with a high-power charging profile.


Robust operation is assured by the controller’s comprehensive set of protection features. These include short-circuit protection up to 22 V, and high-voltage capability up to 28 V on the bus voltage pins that are directly connected to its power path.


  • Zero power consumption when unplugged
  • Fault management
    • Automatic restart after fault is cleared
  • Dual high-power charging path support
  • Integrated bus voltage monitoring
  • Internal and/or external bus voltage discharge paths
  • Debug accessory mode support
  • Operating-temperature range: -40°C to 105°C
  • Interoperable with USB PD rev 3.0 devices


  • Printers
  • Video and still cameras
  • IoT devices
  • Drones
  • LED lighting
  • Toys
  • Gaming equipment
  • Point-of-sale equipment
  • Scanners
  • Healthcare equipment

Evaluation Board

Board Part Number: STEVAL-ISC005V1

The STEVAL-ISC005V1 evaluation board is a ready-to-use USB PD sink based on the STUSB4500. It handles the USB PD negotiation with a source to enable one or more charging paths. LEDs report power availability on each of the four available outputs. The USB PD sink port is pre-configured with three different power data objects (PDOs) to address a broad range of applications at 5 V, 15 V or 20 V. PDOs can easily be customized with a graphical user interface tool.

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