STEVAL-ISA172V2

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2 kW fully digital AC-DC power supply (D-SMPS) evaluation board

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Overview

Product overview

Description

Description

The STEVAL-ISA172V2 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 a STM32F334 microcontroller for each section.

The interleaved PFC comprises two boost converters operating with 180° out of phase, based on 600 V MDmesh M2 Power MOSFETs. The downstream section comprises of a DC-DC phase-shifted full-bridge converter based on MDmesh DM2 Power MOSFETs and performing voltage step down using HF transformer, with a primary to secondary ratio chosen to maintain high enough 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) operation.

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.

  • All 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
    • DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
    • DC-DC switching frequency: 100 kHz
    • Overall efficiency: 80 PLUS Platinum level
    • HF transformer isolation voltage: 4 kV
    • Forced cooling with air flow speed modulation according to the output power
    • Over-temperature protection
    • Output short-circuit protection
    • 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
    • Active clamp circuit based on MDmesh DM2 Power MOSFETs
    • EMC filter for noise reduction
    • RoHS compliant

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
ECOPACK 1: Initial grade to identify European RoHS compliant products.
ECOPACK 2: New grade to identify brominated chlorinated and antimony oxide flame retardant free products.
ECOPACK 3: Halogen free RoHS exemptions free products.
(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.Compliancy with WEEE Directive (2012/19/EU)The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Budgetary PriceMain country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.