UPC1934 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPC1934

DC-DC CONVERTER CONTROL IC

NEC => Renesas Technology 

µ 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

4

Data Sheet G13567EJ3V0DS00

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