refpdt007

Reference Design

A system-level evaluation board that combines ROHM's IC and discrete products. We have already solved not only the characteristics of individual products but also the problems that may occur when combining them to build a system, thus contributing significantly to the reduction of development time for our customers.

REFPDT007
5kW High-Efficiency Fan-less Inverter Reference Design

Summary

We employ trans-linked interleaved circuits as inverter circuits that utilize the high frequency switching performance of silicon carbide (SiC) MOSFET, achieving a power conversion efficiency of 99% or more at 5kW.Since this circuit topology allows a reduction in the inductance of the smoothing reactor, the high efficiency is achieved by reducing the number of windings of the reactor to dramatically reduce the copper loss.
These novel inverter circuits have been developed jointly with Power Assist Technology Ltd.(https://www.power-assist-tech.co.jp/)
This reference design consists of three boards. Each is shown in the table below.

Reference Board NameOutline
REFPDT007-EVK-001APower Stage
REFPDT007-EVK-001BController Board
REFPDT007-EVK-001CAux Power Supply

Since the interleaved type using SiC MOSFET (SCT3017AL, SCT3030AL) has an efficiency of 99.0% (total loss 51 W), heat generation is reduced, and the circuit can be cooled with downsized heat radiation fins without using a cooling fan.
Furthermore, since the apparent switching frequency is doubled for the interleaved type, the smoothing filter is downsized by a factor of 2 in its size and weight.

Reference Design Brief

Reference Board NameREFPDT007-EVK-001
VinDC320V
VoutAC200V
IoutAC25A
fsw40kHz
Iout pp/Iout peakLess than 0.2
Bm maxLess than 0.15T

Applications

  • Inverter circuit
Reference Board Image

Reference Board Image

REFPDT007-EVK-001A

Product Contents

Product nameSpiceUn-encrypted Spiceweb simsymbol&
footprint
3D Modelthermal
model
Calc toolEVK, Eval board for individual product
SCT3030AL------
SCT3017AL------
SCS212AM-------

Design Data

REFPDT007-EVK-001B

Product Contents

Product nameSpiceUn-encrypted Spiceweb simsymbol&
footprint
3D Modelthermal
model
Calc toolEVK, Eval board for individual product
SCT3030AL------
SCT3017AL------
SCS212AM-------

Design Data

REFPDT007-EVK-001C

Product Contents

Product nameSpiceUn-encrypted Spiceweb simsymbol&
footprint
3D Modelthermal
model
Calc toolEVK, Eval board for individual product
SCT3030AL------
SCT3017AL------
SCS212AM-------

Design Data

製品特設CSS