The ST-ONE from STMicroelectronics is a Fully Integrated Digital Controller that is specifically designed to control ZVS non-complementary active clamp flyback converters to create high power density chargers and adapters with USB-PD interface. This PMIC is based on an ARM Cortex M0+ core processor, an offline programmable controller with a synchronous rectifier, and a USB-PD PHY interface. It connects an FW programmable MCU at the secondary side to control both synchronous rectifier and ZVS active clamp flyback converters on the primary side to improve system efficiency during every condition. This PMIC combines high switching frequency operations with MasterGaN power stage to integrate magnetic components with small form-factor, including planar transformers. It utilizes a novel non-complementary control technique and specifically designed power modes to achieve high efficiency as well as low no-load power consumption.

The ST-ONE has preloaded firmware that handles power conversion and communication protocols for USB-PD along with an optional PPS and electronically marked cable management. It is available in a surface-mount package that measures 15.20 x 10.05 mm and is ideal for USB-PD chargers and adapters up to 100 W for smartphones, tablets, laptops, and other handheld applications.