STMicroelectronics EVLONEMP

Overview

EVLONEMP from STMicroelectronics is a high-power-density, dual-port USB Power Delivery evaluation board featuring one USB Type-C® port with Programmable Power Supply (PPS) support and one USB Type-A port delivering up to 10 W (5 V@2 A). It implements a ZVS non-complementary active clamp flyback topology using MasterGaN4 power stage and ST-ONEMP digital controller, achieving >93% efficiency at full load and 65 W total output across 90–265 Vac input.

For engineers reviewing the EVLONEMP datasheet, EVLONEMP pinout, EVLONEMP application, or EVLONEMP equivalent, this board serves as a reference design for compact, high-efficiency multiport USB PD chargers targeting fast-charging consumer electronics, portable medical devices, and industrial handhelds requiring precise PPS voltage/current control and thermal robustness.

Technical Context

The EVLONEMP integrates ST-ONEMP - an Arm® Cortex®-M0+ based digital controller embedding offline startup, synchronous rectification control, USB PD PHY, and galvanically isolated dual-channel communication between primary and secondary sides. It drives MasterGaN4 for high-frequency ZVS operation, enabling small magnetics and high power density (26 W/in³).

Its USB PD stack supports five fixed PDOs and two APDOs on the Type-C port, with dynamic reconfiguration when Type-A is loaded: PPS voltage ranges shift (e.g., 3.3–21 V → 5–21 V), current limits scale (3.75 A → 2.5 A at 20 V), and feedback loops maintain tight ±1% CV/CC regulation under variable load and line conditions.

Key Specifications

Availability

EVLONEMP is available at Aetrix Electronics and suitable for USB PD charger development, GaN power stage validation, and PPS-enabled fast-charging reference design implementation requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for EVLONEMP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.

EVLONEMP belongs to ST's STONE (ST ON-EMbedded Power) platform - a family of digitally controlled, GaN-optimized USB PD reference designs targeting ultra-compact, high-efficiency AC-DC adapters and multiport chargers.

FAQ

What is the purpose of the daughterboard in the EVLONEMP system?

The daughterboard hosts the USB Type-A port circuitry, including MP5030DGQH-Z port controller for load detection and MP28167GQ-A buck-boost converter for 5 V regulation. It interfaces with the motherboard via dedicated signal lines (BB_IN, BB_OUT, BB_EN, STATUS) and shares ground and 3.3 V rails, enabling independent Type-A power delivery while maintaining synchronized USB PD negotiation on the Type-C side.

Does EVLONEMP support USB PD 3.1 Extended Power Range (EPR)?

No. EVLONEMP implements USB PD 3.0 with five fixed PDOs and two APDOs compliant with the USB PD 3.0 specification. It does not support EPR voltages beyond 21 V or power levels above 65 W, as confirmed by its maximum 20 [email protected] A PDO and absence of 28 V/36 V/48 V profiles in the data brief DB4864.

How is isolation achieved between primary and secondary sides?

Isolation is implemented via ST-ONEMP's embedded galvanically isolated dual communication channel - a proprietary digital isolator integrated into the SSOP36 package. This eliminates external optocouplers or digital isolators, enabling precise timing-critical feedback loop control and safe transmission of PWM, status, and configuration signals across the 4 kV reinforced isolation barrier.

Can EVLONEMP be modified to support only USB Type-C output?

Yes. The motherboard provides direct access to all Type-C power path components (U1 ST-ONEMP, MG1 MasterGaN4, J2 USB-C receptacle) and supports standalone operation. Removing the daughterboard and disabling Type-A load detection (via JP1 open or firmware modification) allows full 65 W allocation to the Type-C port with unchanged PDO/APDO behavior and PPS performance.