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AN-1204

Application Note AN-1204

Application Note, explaining the overload/short circuit power dissipation,

Remote Sense and output filtering of ARE28XXS/D

By

Abhijit D. Pathak, Juan R. Lopez

International Rectifier, HiRel, An Infineon Technologies Company, 2520 Junction

Avenue, San Jose, CA 95134, U.S.A.

Table of Contents

1

PREFACE................................................................................................................................ 2

2

BACKGROUND ....................................................................................................................... 2

3

DESIGN CONSIDERATIONS ................................................................................................. 2

3.1

Over Load Behavior......................................................................................................... 2

3.2

Design of Heat Sink ......................................................................................................... 3

4

Remote Sense ......................................................................................................................... 4

5

OUTPUT FILTERING .............................................................................................................. 5

5.1

Measuring Output Ripple of ARE28XXS-D ..................................................................... 5

5.2

External Filters ................................................................................................................. 7

6

OUTPUT RIPPLE MEASUREMENT WITH EXTERNAL FILTER ........................................... 8

7

LAYOUT AND CONNECTION OF THE ARE28XXS-D......................................................... 11

8

CONCLUSION:...................................................................................................................... 11