STMicroelectronics STEVAL-DPSLLCK1 3 kW Digital AC-DC Converter Development Kit
Develop high-performance industrial AC-DC power solutions with STEVAL-DPSLLCK1, featuring 3 kW output, bridgeless PFC, LLC topology, and STM32 digital control.
The STEVAL-DPSLLCK1 is a high-performance 3 kW digitally controlled AC-DC power supply kit, engineered for industrial, telecom, and server applications. Featuring a full-bridge LLC resonant converter with bridgeless PFC, the kit delivers a stable 48 V output at up to 62.5 A from a 375–425 V DC input, achieving peak efficiency of 95%. Its compact, lab-ready platform combines a power board, digital control board, adapter board, and firmware modules for flexible evaluation and rapid prototyping.
The primary full-bridge section uses MDmesh DM2 power MOSFETs, while STripFET F7 devices on the secondary implement adaptive synchronous rectification (SR) to minimize conduction losses. The converter operates near resonant frequencies with Zero Voltage Switching (ZVS) across its range, and the HF transformer provides galvanic isolation and integrates inductive elements for a compact, high-efficiency design.
Digital control is handled by an STM32F334 MCU, offering high-resolution timers for precise voltage regulation, status monitoring, and communication via USART, CAN, SMBus, and opto-isolated interfaces. Both primary and secondary circuits are powered by an off-line VIPer27HD flyback, providing regulated voltages to the MCU, gate drivers, and signal conditioning.
Expandable with an optional PFC and the supplied adapter board, the STEVAL-DPSLLCK1 is ideal for developing next-generation industrial power solutions, maximizing efficiency, and minimizing design complexity.
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Why Choose The STEVAL-DPSLLCK1?
- True digital DSMPS control: High-resolution HRTIM on STM32F334 enables sub-nanosecond timing precision and firmware-level tuning (ex.frequency control, burst mode, adaptive SR), perfect for advanced control/algorithm R&D.
- Production-grade power chain: The full-bridge primary with MDmesh™ DM2 HV MOSFETs and secondary STripFET™ F7 synchronous MOSFETs reduce switching and conduction losses and enable ZVS across the operating range.
- High measured efficiency and thermal management: 95.3% peak efficiency and fan-speed modulation based on load/temperature for safe, repeatable 3 kW testing.
- Modular, bench-ready package: Separate power board (STEVAL-DPSLLCP1), digital control board (STEVAL-DPS334C1), and adapter board (STEVAL-DPSADP01). Firmware is shipped on the control board and open to customization.
Kit Contents
- Evaluation Kit
- VIPER27/STM32F334
Features and Benefits
Power ratings:
- input DC voltage: 375 V to 425 V
- output voltage: 48 V
- maximum output current: 62.5 A
- output power: 3 kW
- peak efficiency: 95.3%
- HF transformer isolation voltage: 4 kV
Resonant and switching frequencies:
- max DC-DC switching frequency: 380 kHz (at startup)
- closed loop switching frequency: 120 kHz to 250 kHz
- resonant frequency: 175 kHz
Protection mechanisms:
- undervoltage and overvoltage protection on input and output
- overtemperature protection
- short-circuit protection
- forced cooling with air flow speed modulation according to the output power and temperature
Efficiency:
- adaptive synchronous rectification
- light load burst mode
Topology
STEVAL-DPSLLCK1 topology
Applications
- Power supplies and converters
- Home and professional appliances
- Lighting and controls
Technical Documents and Resources
User Manuals
Datasheets
Design Files
Application Notes
Technical Notes
Brochures
Flyers
Videos
STM32L4 OLT -12. System - Switched Mode Power Supply
Getting started with STM32F334 for digital power conversion
Digital Power Control with the STM32F334
STPOWER – Modules Family
Power MOSFET LV Motor Control
Product overview - 60 V STripFET F7 MOSFETs (ePresentation)
Associated Products
Created: 25 August 2025