Data Sheet G13567EJ3V0DS00

4

µµµµ PC1934

CONTENTS

1.

ELECTRICAL SPECIFICATIONS ................................................................................................................ 5

2.

CONFIGURATION AND OPERATION OF EACH BLOCK.................................................................... 10

2.1

Reference Voltage Generator ...........................................................................................................................10

2.2

Oscillator ...........................................................................................................................................................10

2.3

Under Voltage Lock-out Circuit ........................................................................................................................11

2.4

Error Amplifiers.................................................................................................................................................11

2.5

PWM Comparators ............................................................................................................................................11

2.6

Timer Latch-Method Short Circuit Protection Circuit ....................................................................................11

2.7

Output Circuit ....................................................................................................................................................11

3.

NOTES ON USE........................................................................................................................................ 12

3.1

Setting the Output Voltage ...............................................................................................................................12

3.2

Setting the Oscillation Frequency ...................................................................................................................13

3.3

Preventing Malfunction of the Timer Latch-Method Short Circuit Protection Circuit..................................13

3.4

Connecting Unused Error Amplifiers ..............................................................................................................13

3.5

ON/OFF Control.................................................................................................................................................14

3.6

Notes on Actual Pattern Wiring........................................................................................................................14

4.

APPLICATION EXAMPLE ......................................................................................................................... 15

4.1

Application Example.........................................................................................................................................15

4.2

List of External Parts ........................................................................................................................................15

5.

PACKAGE DRAWINGS.............................................................................................................................. 16

6.

RECOMMENDED SOLDERING CONDITIONS ....................................................................................... 18