500V CoolMOS

4

Application Note AN 2012-04

V1.0 April 2012

1

Introduction

The new CoolMOS

MOSFETs designed according to the revolutionary superjunction (SJ) principle in the 500V class. 500V CE

portfolio provides all benefits of a fast switching superjunction (SJ) MOSFET while keeping ease of use and

implementation. The complete CE series of MOSFETs achieve very low conduction and switching losses,

and can make applications more efficient, more compact, lighter and thermally cooler.

This application note will describe the fundamental differences between a SJ MOSFET and a standard

MOSFET. Additionally, all features and benefits impacting the target applications will be described.

Furthermore, these features will be illustrated from both a theoretical point of view and in hardware

measurements. It will also be shown that CoolMOS

MOSFETs, which enables reaching higher efficiency levels while offering an attractive price/performance

ratio.

1.1

Features and Benefits

The following table represents the features and benefits of CoolMOS

MOSFETs, which will be discussed in depth in the main part of this application note.

Table 1: features and benefits

FEATURES

BENEFITS

Reduced energy stored in output

Reduction of switching losses,

improvement of light load efficiency

High body diode ruggedness

Higher reliability under critical operating

conditions

Lower possibility of hard commutation in

resonant topologies

Improvement in light load efficiency

Lower gate drive capability required

Overall Features

Easy control of switching behavior

Outstanding reliability with proven

CoolMOS