STMicroelectronics VIPER17HD | Demoboard STEVAL-ISA172V1

Description

The STEVAL-ISA172V1 is a 2 kW fully digital switch mode AC-DC converter consisting of two power sections: a two phase interleaved power factor corrector (PFC) and a DC-DC phase-shifted full-bridge converter, controlled by an STM32F334 microcontroller for each section.The interleaved PFC comprises two boost converters operating 180° out of phase, based on 600 V MDmesh M2 power MOSFETs. The downstream section comprises a DC-DC phase-shifted full-bridge converter based on MDmesh DM2 power MOSFETs and performs voltage step-down using an HF transformer, with a primary-to-secondary ratio chosen to maintain a sufficiently high efficiency and regulation over the entire operating range.On the primary side, the transformer is supplied by the full-bridge converter and switching losses are reduced thanks to zero voltage switching (ZVS).On the secondary side, synchronous rectification (SR) is used to ensure low conduction losses. The output voltage waveform is rectified by STripFET power MOSFETs and then smoothed by the output filter.

Features

• Input AC voltage: 90 V to 264 V
• Output voltage: 48 V or 52 V, max output current: 42 A
• Input AC frequency: 45 Hz to 65 Hz
• Nominal output power: 2 kW
• Interleaved PFC stage
• PFC switching frequency: 60 kHz
• PFC average current mode control
• Cycle-by-cycle PFC current control
• Maximum power factor: 0.99
• Mains under and overvoltage, under- and over-frequency protection
• DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
• DC-DC switching frequency: 100 kHz
• HF transformer isolation voltage: 4 kV
• Forced cooling with air flow speed modulation according to the output power
• Overtemperature protection
• Full set of input and output protections
• PFC control & DC-DC control managed by STM32F334C8
• PFC power stage based on MDmesh M2 power MOSFETs and SiC diodes
• DC-DC power stage based on MDmesh DM2 power MOSFETs
• Synchronous rectification based on STripFET power MOSFETs
• EMC filter for noise reduction
• RoHS compliant(not available)

More information

• Datasheet