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UPC1934 Datasheet(PDF) 4 Page - NEC

Part No. UPC1934
Description  DC-DC CONVERTER CONTROL IC
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Maker  NEC [NEC]
Homepage  http://www.nec.com/
Logo NEC - NEC

UPC1934 Datasheet(HTML) 4 Page - NEC

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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


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