100 W USB PD sink power controller with flexible management and protection features
The STMicroelectronics STUSB4500, which can operate in stand-alone mode with no need for a microcontroller, can be used in USB Type-C® connections, and is backed by a comprehensive set of protection functions.
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 PD controller 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 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 controller 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.