STEVAL-DPSLLCK1

STEVAL-DPSLLCK1 is a 3kW full bridge LLC resonant digital power supply evaluation kit. This is a digitally controlled 3kW full bridge LLC resonant DCDC converter with output synchronous rectification. The kit consists of a power board, digital control board, adapter board amd firmware modules. The full bridge primary section of LLC converter is based on MDmesh™ DM2 Power MOSFETs for high efficiency performance. The PWM switching frequency is digitally controlled to regulate output voltage. The converter operates at near resonant frequencies to maximize efficiency and achieve ZVS over entire operating range. The HF transformer provides galvanic isolation and magnetic integration of the inductive elements for a compact design. Synchronous rectification (SR) with STripFET™ F7 Power MOSFETs is employed on the secondary side to reduce conduction losses. The STM32F334 MCU on the digital control board embeds a high resolution timer for finer regulation and can communicate status information.

• Input DC voltage range from 375V to 425V and 48V output voltage
• Maximum output current is 62.5A and 3kW output power
• Peak efficiency of 95.3% and HF transformer isolation voltage is 4kV
• 175kHz resonant frequency, 120kHz to 250kHz closed loop switching frequency
• Undervoltage and overvoltage protection on input and output
• Overtemperature protection and short-circuit protection
• Forced cooling with air flow speed modulation according to the output power and temperature
• Adaptive synchronous rectification
• Light load burst mode
• Digital control with STM32F334 microcontroller

Contents

Power board, Digital control board, adapter board amd firmware modules.