ST-ONEMP

Power Management - Specialized Overview

The ST-ONEMP is a digital controller integrating an Arm Cortex-M0+ MCU, offline programmable controller with synchronous rectification, and USB PD PHY in a single package. Designed for ZVS non-complementary active clamp flyback converters, it enables high-power-density chargers with one USB-PD interface and one secondary output. It features pre-loaded firmware for power conversion and USB-PD communication, including PPS and E-marker management. The device supports dynamic power sharing between outputs via a dedicated pin. It includes an 800 V high-voltage startup module, input voltage detection, and overvoltage/undervoltage protection. Enhanced electrical isolation connects primary and secondary sides via dual isolated communication channels.

Power Management - Specialized Feature Summary

• Integrates Arm Cortex-M0+ microcontroller with 64 kB Flash for digital power control and USB protocol handling within a single package.
• Supports ZVS non-complementary active clamp flyback topology with integrated synchronous rectification to maximize system efficiency.
• Features enhanced electrical isolation with dual communication channels connecting primary-side controller and secondary-side MCU.
• Includes fully integrated USB-PD PHY with load switch driver and support for PPS and electronic marker cable management.

Power Management - Specialized Applications

• High power density chargers and adapters with USB-PD interfaces
• Multi-port fast charging designs requiring dynamic power sharing
• Systems utilizing MasterGaN power stages for high switching frequency operation

Power Management - Specialized Procurement Notes

Verify the specific package type and marking code against the official datasheet before procurement. Confirm that the pre-loaded firmware version meets your application's USB-PD profile requirements. Ensure the design adheres to the enhanced isolation specifications for safety compliance. Check for any specific ordering suffixes that may indicate different firmware configurations or packaging options. Validate component authenticity through authorized distribution channels.

Power Management - Specialized Selection Notes

Select this component for applications requiring a highly integrated solution for active clamp flyback converters. It is suitable for designs needing both primary-side control and secondary-side synchronous rectification managed by a digital core. Consider its capabilities when designing systems that require USB-PD 3.1 PPS support and dynamic power allocation between multiple ports. Evaluate the integration level against discrete controller and MCU combinations to assess space and BOM savings.

Power Management - Specialized Part Context

The ST-ONEMP belongs to STMicroelectronics' portfolio of advanced power management and digital control solutions. It represents a convergence of power electronics and embedded computing, targeting the consumer electronics and adapter market. The device leverages ST's expertise in Arm-based MCUs and power technologies to simplify the design of complex multi-port charging systems while maintaining high efficiency and low standby power consumption.

Power Management - Specialized Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should consult STMicroelectronics directly for potential alternatives or next-generation replacements if this component becomes obsolete.

Power Management - Specialized FAQ

How does the ST-ONEMP manage power distribution between the USB-PD port and the secondary output?

The device allows for dynamic power sharing between the USB-PD port and the secondary output using a dedicated power sharing pin input. This enables the system to adjust the available Power Delivery Objects (PDOs) based on the load conditions of the other port.

What isolation features are included in the ST-ONEMP?

The ST-ONEMP incorporates enhanced electrical isolation with dual communication channels connecting the primary and secondary sides. It supports 4 kV peak transient voltage, 9.6 kV peak hipot testing for one minute, and 6.4 kV peak hipot testing for one second, complying with IEC 62368-1 standards.

Can the firmware on the ST-ONEMP be customized?

Yes, the device includes a user-adjustable memory area for storing default configuration settings. While it comes with pre-loaded firmware for standard power conversion and USB-PD protocols, users can modify these settings to adapt to specific final product requirements.