STMicroelectronics STEVAL-DPSLLCK1 Evaluation Kit
STMicroelectronics STEVAL-DPSLLCK1 Evaluation Kit is a digitally-controlled 3kW full bridge LLC resonant DC-DC converter with output synchronous rectification. The STEVAL-DPSLLCK1 consists of a power board, digital control board, adapter board, and firmware modules. The full bridge primary section of the LLC converter is based on MDmesh™ DM2 Power MOSFETs for high-efficiency performance. The PWM switching frequency is digitally controlled to regulate the output voltage. The converter operates at near resonant frequencies to maximize efficiency and achieve Zero Voltage Switching (ZVS) over the entire operating range. The HF transformer provides galvanic isolation and magnetic integration of the inductive elements for a compact design.
Features
- Power ratings:
- 375V to 425V input DC voltage
- 48V output voltage
- 62.5A maximum output current
- 3kW output power
- 95.3% peak efficiency
- 4kV HF transformer isolation voltage
- Resonant and switching frequencies:
- 380kHz (max) DC-DC switching frequency (at startup)
- 120kHz to 250kHz closed loop switching frequency
- 175kHz resonant frequency
- 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
- Digital control with STM32F334 microcontroller
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Published: 2018-09-12
| Updated: 2023-02-20