STMicroelectronics EVL150W-ADP-SR

Overview

EVL150W-ADP-SR from STMicroelectronics is a 150 W, 12 V/12.5 A SMPS demonstration board implementing a two-stage architecture: transition-mode PFC using L6563H and LLC resonant DC-DC conversion controlled by L6599A and SRK2000A synchronous rectification driver. It achieves >91% efficiency at 115 Vac nominal load, <0.2 W standby consumption at 230 Vac, and meets EN61000-3-2 Class-D harmonic limits - designed specifically for all-in-one computer power supplies compliant with ENERGY STAR® EPA rev. 5.0 and rev. 2.0 EPS standards.

For engineers reviewing the EVL150W-ADP-SR datasheet, EVL150W-ADP-SR application, EVL150W-ADP-SR bill of materials, or EVL150W-ADP-SR functional block diagram, this page delivers verified design context, measured performance data, thermal and EMI pre-compliance results, and implementation guidance for high-efficiency AC-DC conversion in compact desktop PSUs.

Technical Context

The board integrates three ST ICs in coordinated operation: L6563H provides high-voltage start-up and PFC regulation with fast voltage feedforward to maintain low THD across line sags; L6599A controls the LLC resonant stage with fixed 50% duty cycle, variable-frequency operation, and integrated LINE pin monitoring (380 V turn-on / 300 V turn-off hysteresis) to prevent capacitive-mode failure.

SRK2000A drives secondary-side synchronous MOSFETs via DVS1/DVS2 drain-voltage sensing, enabling zero-current turn-off and automatic sleep mode entry below ~5 W output load - reducing light-load losses and enabling sub-0.2 W standby. The PFC_STOP pin interlock allows L6599A to force L6563H into burst mode during light load, synchronizing both stages for optimal efficiency.

Key Specifications

Availability

EVL150W-ADP-SR is available at Aetrix Electronics and suitable for high-efficiency desktop PSU development, ENERGY STAR®-certified external power supply qualification, and industrial embedded AC-DC reference design validation requiring stable component supply and documented thermal/EMI behavior.

Supply support for EVL150W-ADP-SR 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 analog, power, microcontroller, and sensor solutions for automotive, industrial, and consumer applications.

EVL150W-ADP-SR belongs to ST's Power Supply Evaluation Board product line, developed to demonstrate high-efficiency, low-standby AC-DC architectures using ST's proprietary PFC, resonant control, and synchronous rectification ICs for compliance-critical computing power systems.

FAQ

Is EVL150W-ADP-SR a production-ready power supply or a development tool?

EVL150W-ADP-SR is a fully assembled, tested demonstration board intended for evaluation, reference design validation, and pre-compliance testing - not for end-product integration. It includes complete schematics, layout files, thermal maps, and measurement reports in AN3233 to accelerate customer design transfer, but requires customization for safety certification and mechanical integration.

Which ST ICs are mounted on the board and what are their roles?

The board integrates three key ST ICs: L6563H (transition-mode PFC controller with HV start-up), L6599A (LLC resonant half-bridge controller with LINE monitoring and PFC_STOP interface), and SRK2000A (dual-channel synchronous rectifier driver with DVS sensing and auto-sleep). These are co-optimized for coordinated two-stage operation.

Does the board include EMI filtering and thermal management documentation?

Yes - AN3233 includes conducted emission pre-compliance test results (Figures 23–24), thermal maps at 115 Vac and 230 Vac full load (Figures 20–21), and SR daughterboard thermal imaging (Figure 22). Input EMI filtering uses standard X/Y capacitors and common-mode chokes; no external heatsinks are required for MOSFETs under rated conditions.

Can EVL150W-ADP-SR be modified to support different output voltages?

Output voltage is fixed at 12 V by transformer turns ratio and feedback resistor network (TSM1014A-based loop). Modification requires redesigning the transformer, adjusting feedback divider (R32/R33), recalibrating current sense (RCS), and revalidating burst mode thresholds and protection levels - not supported out-of-box.