Features

•

ZVS non-complementary active clamp flyback controller with synchronous

rectification and USB-PD 3.1 PPS interface

•

ARM® 32-bit Cortex®-M0+ MCU with 64 kB flash memory for digital power

control and USB protocol

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FW programmable secondary side MCU controls both synchronous rectifier

and ZVS Active Clamp flyback on the primary side to improve system

efficiency in every condition

–

High switching frequency operations in companion with MasterGaN power

stage allow to use small size magnetic components, including planar

transformers

•

Reinforced galvanically isolated dual communication channel compliant with IEC

62368:

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4 kV pk transient voltage

–

9.6 kV pk 1min hipot type testing

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6.4 kV pk 1s hipot production testing

•

800 V high voltage startup with integrated input voltage sensing and Brown-

in/out functions

•

Active input filter capacitor discharge circuitry for reduced standby power

compliant with IEC 62368-1

•

Fully Integrated USB-PD PHY with 24 V tolerant protection, and integrated load

switch driver

Application

•

USB-PD chargers and adapters up to 100 W for smartphones, tablets, laptops

and other handheld equipment

Description

The ST-ONE is the world’s first digital controller embedding ARM Cortex M0+ core,

an offline programmable controller with synchronous rectification, and USB PD

PHY in a single package. Such a system is specifically designed to control ZVS

non-complementary active clamp flyback converters to create high power density

chargers and adapters with USB-PD interface.

The 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 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 to reach both high efficiency and low no

load power consumption

The device is delivered with a 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 factory process.

The user can change or adapt this memory area to fit the final product specifications.

Product status link

ST-ONE

Product label

diagram

TYPE-C

USB

ST-ONE

Fully integrated controller for smart chargers

ST-ONE

Data brief

DB4752 - Rev 1 - May 2022

For further information contact your local STMicroelectronics sales office.

www.st.com