STMicroelectronics' ST-ONE is the world’s first digital controller embedding Arm® Cortex®-M0+ core, an offline programmable controller with synchronous rectification and USB Power Delivery (PD) PHY in a single package. This system is specifically designed to control ZVS non-complementary active clamp flyback converters to create high-power-density battery chargers and adapters with a USB-PD interface.

The ST-ONE device includes an active clamp flyback controller and its HV startup on the primary side. A microcontroller and all the peripherals required to control the conversion and the USB-PD communication are included on the secondary side. The two sides are connected through an embedded galvanically isolated dual communication channel. By using a novel non-complementary control technique and specifically designed power modes, the device allows the reach of both high efficiency and low no-load power consumption. The device is delivered with pre-loaded firmware, which handles both the power conversion and the communication protocols for USB-PD, including optional PPS and electronically marked cable management. A dedicated memory stores a default device configuration during the factory process. The user can change or adapt this memory area to fit the final product specifications.

The ST-ONEMP belongs to the ST-ONE family: the world’s first digital controllers embedding Arm Cortex M0+ core, an offline programmable controller with synchronous rectification, and USB PD PHY in a single package. The ST-ONEMP is designed to manage multiple output systems where USB-PD is the master output. The output power and available PDOs on the USB-PD port can be changed to allow power sharing with the other outputs. The digital controller embedded in the ST-ONEMP is specifically designed to control ZVS non-complementary active clamp flyback converters to create high power density battery chargers and adapters with USB-PD interface.

Features

• Non-complementary active clamp flyback topology allows high power (65 W and more) with higher efficiency with respect to QR flyback
• High-frequency operations, together with GaN FET usage, allow the magnetic component to be smaller size
• High level of integration reduces total BOM
• Cortex-M0+ core with 64 kB embedded Flash allows customization of both the USB-PD protocol and the power conversion stage
• ST-ONE is provided with USB-PD 3.1 PPS-certified firmware pre-loaded into the Flash memory, a turnkey solution for standard applications