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AN1376 APPLICATION NOTE

Table of Contents

1

INTRODUCTION ................................................................................................................................1

2

MAIN CHARACTERISTICS ...............................................................................................................2

3

ELECTRICAL DIAGRAM ...................................................................................................................3

4

CROSS REGULATION ......................................................................................................................6

5

OUTPUT VOLTAGE RIPPLE @FULL LOAD...................................................................................10

6

MEASUREMENT OF THE RMS CAPACITOR CURRENTS ...........................................................11

7

DYNAMIC LOAD TESTS .................................................................................................................12

8

START-UP BEHAVIOUR @FULL LOAD .........................................................................................14

9

WAKE-UP TIME ...............................................................................................................................15

10

TURN-OFF .......................................................................................................................................16

11

SHORT-CIRCUIT TESTS @ FULL LOAD .......................................................................................17

12

SHORT CIRCUIT PROTECTION @ LOW LOAD ............................................................................20

13

SHORT CIRCUIT PROTECTION @ NO LOAD ...............................................................................20

14

SHORT CIRCUIT OF THE OUTPUT RECTIFIERS .........................................................................21

15

SWITCH ON AND TURN OFF IN SHORT CIRCUIT CONDITION ..................................................22

16

OVER VOLTAGE PROTECTION.....................................................................................................23

17

CONDUCTED NOISE MEASUREMENTS (PRE-COMPLIANCE TEST) ........................................24

18

THERMAL MEASURES ...................................................................................................................26

19

CONCLUSIONS ...............................................................................................................................28

20

REFERENCES.................................................................................................................................28

21

ANNEX 1 .........................................................................................................................................28

22

ANNEX 2 ..........................................................................................................................................31