STMicroelectronics EVLCMB1-AIO210W

Overview

EVLCMB1-AIO210W from STMicroelectronics is a 12 V, 210 W AC/DC demonstration board designed for all-in-one PC adapters, featuring universal 90–264 Vac input, 17.5 A continuous output, >90% full-load efficiency, <90 mW no-load consumption, and EN61000-3-2 Class-D harmonic compliance.

For engineers reviewing the EVLCMB1-AIO210W datasheet, EVLCMB1-AIO210W pinout, EVLCMB1-AIO210W application, or EVLCMB1-AIO210W equivalent, this board serves as a validated reference design for high-efficiency, low-light-load SMPS targeting desktop all-in-one systems, medical auxiliary supplies, and industrial embedded power modules requiring ENERGY STAR® 6.1 and CoC v5 Tier 2 compliance.

Technical Context

The EVLCMB1-AIO210W implements a two-stage architecture: a transition-mode PFC pre-regulator followed by an LLC resonant half-bridge converter, both controlled by the integrated STCMB1 combo IC. The PFC uses constant-on-time control without sinusoidal input voltage sensing, reducing component count and cost.

The LLC stage employs proprietary time-shift control to improve dynamic response and input ripple rejection, enabling clean 12 V output under transient load conditions. Synchronous rectification via SRK2001 further enhances light-load efficiency, supported by burst-mode management with minimized switching cycles in burst packets.

Key Specifications

Availability

EVLCMB1-AIO210W is available at Aetrix Electronics and suitable for all-in-one PC power supplies, medical auxiliary power units, and industrial embedded AC/DC conversion requiring stable component supply, regulatory-compliant reference designs, and rapid prototyping support.

Supply support for EVLCMB1-AIO210W 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, analog devices, and silicon solutions for automotive, industrial, and consumer markets.

The EVLCMB1-AIO210W belongs to ST's evaluation board portfolio for AC/DC power conversion, developed to showcase the STCMB1 combo controller's capability in high-efficiency, low-component-count adapter designs targeting ENERGY STAR® and European CoC regulations.

FAQ

Is the EVLCMB1-AIO210W RoHS compliant?

Yes. The EVLCMB1-AIO210W demonstration board is fully RoHS compliant, as confirmed in the official STMicroelectronics data brief (DocID030716 Rev 1, June 2017). All components-including STCMB1, SRK2001, STP220N6F7 MOSFETs, and passive elements-meet EU Directive 2011/65/EU requirements for hazardous substance restrictions.

Does this board include safety certifications?

Yes. The board meets EN60950-1 safety standards for information technology equipment, verified through design validation including reinforced isolation, creepage/clearance compliance, and protection circuitry (brown-out detection, overvoltage, overcurrent, and thermal shutdown) embedded in the STCMB1 IC.

Can the EVLCMB1-AIO210W be modified for 19 V output?

No. The board is fixed-output at 12 V, with transformer turns ratio, feedback resistor network (R55, R56), and SRK2001 configuration optimized exclusively for 12 V regulation. Output voltage change would require redesign of the transformer, secondary rectification, feedback divider, and SRK2001 compensation-beyond simple component substitution.

What is the role of the STCMB1 IC on this board?

The STCMB1 is a system-level combo controller integrating both transition-mode PFC and half-bridge LLC resonant controller functions in one SO20W package. It provides high-voltage startup, X-capacitor discharge, AC brown-in/out detection, and comprehensive protections-eliminating need for discrete PFC + LLC controllers and reducing BOM count by ≥7 ICs.