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LT4180EGN-PBF PDF预览

LT4180EGN-PBF

更新时间: 2024-11-11 05:43:35
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
16页 341K
描述
Virtual Remote Sense Controller

LT4180EGN-PBF 数据手册

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Electrical Specifications Subject to Change  
LT4180  
Virtual Remote Sense  
Controller  
FEATURES  
DESCRIPTION  
The LT®4180 solves the problem of providing tight load  
regulation over long, highly resistive cables without  
requiring an additional pair of remote sense wires. This  
Virtual Remote Sense™ device continuously interrogates  
the line impedance and corrects the power supply output  
voltage via its feedback loop to maintain a steady voltage  
at the load regardless of current changes.  
n
Tight Load Regulation with Highly Resistive Cables  
without Requiring Remote Sense Wiring  
n
Compatible with Isolated and Nonisolated Power  
Supplies  
n
1ꢀ Internal Voltage Reference  
n
5mA Sink Current Capability  
n
Soft-Correct Reduces Turn-On Transients  
n
Undervoltage and Overvoltage Protection  
The LT4180 is a full-featured controller with 5mA opto-  
isolator sink capability, under/overvoltage lockout,  
soft-start and a 1ꢀ internal voltage reference. The  
Virtual Remote Sense feature set includes user-program-  
mable dither frequency and optional spread spectrum  
dither.  
n
Pin-Programmable Dither Frequency  
n
Optional Spread Spectrum Dither  
n
Wide V Range: 3.1V to 50V  
IN  
n
24-Pin SSOP Package  
APPLICATIONS  
The LT4180 works with any topology and type of isolated  
or nonisolated power supply, including DC/DC converters  
and adjustable linear regulators.  
n
12V High Intensity Lamps  
n
28V Industrial Systems  
n
High Power (>40 Watts) CAT5 Cable Systems  
Wiring Drop Cancellation for Notebook Computer  
Battery Charging  
AC and DC Adaptors  
Well-Logging and Other Remote Instrumentation  
Surveillance Equipment  
n
The LT4180 is available in a 24-pin, SSOP package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
Virtual Remote Sense is a trademark of Linear Technology Corporation. All other trademarks  
are the property of their respective owners.  
n
n
n
TYPICAL APPLICATION  
Isolated Power Supply with Virtual Remote Sense  
VLOAD vs VWIRE  
5.00  
4.99  
4.98  
4.97  
4.96  
4.95  
CAT5E CABLE  
R
SENSE  
LINE  
LINE  
+
C
L
R
L
SWITCHING  
REGULATOR  
V
C
V
SENSE DIV0 DIV1 DIV2 SPREAD CHOLD1 CHOLD2 CHOLD3 CHOLD4  
LT4180  
IN  
4.94  
4.93  
4.92  
4.91  
DRAIN  
COMP  
R
OSC  
C
OSC  
VIRTUAL REMOTE SENSE  
OV  
RUN FB  
4180 TA01a  
0
0.5  
1
1.5  
2
2.5  
3
V
(V)  
WIRING  
4180 TAO1b  
4180fp  
1

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