The document discusses STMicroelectronics' ST-ONE solution for USB power delivery applications. ST-ONE is an all-in-one digital controller with an integrated USB-PD PHY that enables smaller, lighter and more efficient charger designs. It uses gallium nitride transistors and advanced topologies like active clamp flyback to achieve high power density. ST also provides the MasterGaN family of half-bridge drivers combined with GaN transistors to further improve performance. Evaluation tools are available to help customers design with ST-ONE and MasterGaN.