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UPC1933 Datasheet(Fiches technique) 4 Page - NEC

Numéro de pièce UPC1933
Description  DC-DC CONVERTER CONTROL IC
Télécharger  5 Pages
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Fabricant  NEC [NEC]
Site Internet  http://www.nec.com/
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Data Sheet G13690EJ3V0DS00
4
µµµµ PC1933
CONTENTS
1.
ELECTRICAL SPECIFICATIONS ................................................................................................................ 5
2.
CONFIGURATION AND OPERATION OF EACH BLOCK.................................................................... 11
2.1
Reference Voltage Generator ...........................................................................................................................11
2.2
Oscillator ...........................................................................................................................................................11
2.3
Under Voltage Lock-out Circuit ........................................................................................................................11
2.4
Error Amplifier...................................................................................................................................................11
2.5
PWM Comparator..............................................................................................................................................12
2.6
Timer Latch-Method Short Circuit Protection Circuit ....................................................................................12
2.7
Output Circuit ....................................................................................................................................................12
3.
NOTES ON USE........................................................................................................................................ 13
3.1
Setting the Output Voltage ...............................................................................................................................13
3.2
Setting the Oscillation Frequency ...................................................................................................................13
3.3
Preventing Malfunction of the Timer Latch-Method Short Circuit Protection Circuit..................................13
3.4
ON/OFF Control.................................................................................................................................................14
3.5
Maximum Duty Limit .........................................................................................................................................15
3.6
Notes on Actual Pattern Wiring........................................................................................................................15
4.
APPLICATION EXAMPLE ......................................................................................................................... 16
4.1
Application Example.........................................................................................................................................16
4.2
List of External Parts ........................................................................................................................................16
5.
PACKAGE DRAWING ................................................................................................................................ 17
6.
RECOMMENDED SOLDERING CONDITIONS ....................................................................................... 18




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