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1kW switching power supply digitally controlled multi-phase interleaved converter using STNRG388A

EVLSTNRG-1KW

Overview

The EVLSTRNG-1KW evaluation board is intended for evaluating the STNRG388A digital controller in offline power conversion applications such as EV battery chargers, UPS and industrial power supplies.

The architecture is based on a multiphase interleaved DC/DC converter using the half bridge SAB (“Single Active Bridge”) topology supporting more than 1000 W of power.
The interleaved topology balances the power through 3 parallel stages. Also, the solution delivers high efficiency during the whole load range by enabling one, two or three stages depending on the load.
The STNRG388A power conversion dedicated peripherals (SMEDs) offer the flexibility to drive the interleaved power stages while guaranteeing the correct phase realignment during the activation and deactivation of each stage.
Thanks to the digital core of the STNRG388A, it is also possible to monitor, control and debug the EVLSTRNG-1KW board via a convenient HyperTerminal control.

Main features

Digital controller: STNRG388A
3-phase interleaved DC/DC architecture
Full load power: 1000 W (scalable up to 3 kW)
Efficiency: more than 94% from 10% to full load
Peak efficiency: 96.5% at full load
Stand-by consumption: 425 mW

Input voltage range: 350 ÷ 420 V dc
CC/CV output regulation
Output voltage regulation: 133 V
Output current regulation: 7.5 A
Maximum output current for each phase: 2.5 A
Modular power and control board

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-05-29 17:01:30

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