參數(shù)資料
型號： UPC1935GR
廠商： NEC Corp.
元件分類： DC/DC變換器
英文描述： DC-DC CONVERTER CONTROL IC
中文描述： 的DC - DC轉換器控制IC
文件頁數(shù)： 4/28頁
文件大?。?/td> 185K
代理商： UPC1935GR
Data Sheet G13418EJ3V0DS00
4
μ
PC1935
CONTENTS
1.
ELECTRICAL SPECIFICATIONS................................................................................................................5
2.
CONFIGURATION AND OPERATION OF EACH BLOCK....................................................................11
2.1
Reference Voltage Generator ...........................................................................................................................12
2.2
Oscillator ...........................................................................................................................................................12
2.3
Under Voltage Lock-out Circuit........................................................................................................................12
2.4
Error Amplifiers.................................................................................................................................................12
2.5
PWM Comparators............................................................................................................................................12
2.6
Timer Latch-Method Short Circuit Protection Circuit ....................................................................................13
2.7
Output Circuit....................................................................................................................................................13
3.
NOTES ON USE........................................................................................................................................14
3.1
Setting the Output Voltage ...............................................................................................................................14
3.2
Setting the Oscillation Frequency...................................................................................................................15
3.3
Preventing Malfunction of the Timer Latch-Method Short Circuit Protection Circuit..................................15
3.4
Connecting Unused Error Amplifiers..............................................................................................................16
3.5
ON/OFF Control.................................................................................................................................................17
3.5.1
Channel 1 (for step-up)............................................................................................................................17
3.5.2
Channel 2 (for step-up)............................................................................................................................18
3.5.3
Channel 3 (for inverted output) ................................................................................................................19
3.6
Maximum Duty Limit.........................................................................................................................................20
3.7
Notes on Actual Pattern Wiring........................................................................................................................20
4.
APPLICATION EXAMPLE.........................................................................................................................21
4.1
Application Example.........................................................................................................................................21
4.2
List of External Parts........................................................................................................................................22
5.
PACKAGE DRAWING................................................................................................................................23
6.
RECOMMENDED SOLDERING CONDITIONS .......................................................................................24
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