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MFG:LINEAR  Package Cooled:N/A  D/C:3760  

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Part Number: LT1184

 

MFG: LINEAR

Package Cooled: N/A

D/C: 3760

Description: The LT®1182/LT1183 are dual current mode switchingregulators that provide the control f...


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LT1184 General Description


The LT®1182/LT1183 are dual current mode switchingregulators that provide the control function for Cold Cath-ode Fluorescent Lighting (CCFL) and Liquid Crystal Display(LCD) Contrast. The LT1184/LT1184F provide only theCCFL function. The ICs include high current, high efficiencyswitches, an oscillator, a reference, output drive logic,control blocks and protection circuitry. The LT1182 per-mits positive or negative voltage LCD contrast operation.

The LT1183 permits unipolar contrast operation and pinsout an internal reference. The LT1182/LT1183 supportgrounded and floating lamp configurations.

The LT1184Fsupports grounded and floating lamp configurations.

TheLT1184 supports only grounded lamp configurations. The

LT1184 Maximum Ratings

VIN, BAT, Royer, Bulb ................................................ 30V
CCFL VSW, LCD VSW ...............................................  60V
Shutdown ..................................................................  6V
ICCFL Input Current ..............................................  10mA
DIO Input Current (Peak, < 100ms) ...................... 100mA
LT1182: FBP, FBN, LT1183: FB Pin Current ............  ±2mA
LT1183/LT1184/1184F: REF Pin Source Current ....... 1mA
Junction Temperature (Note 1) ............................  100°C
Operating Ambient Temperature Range ... 0°C to 100°C
Storage Temperature Range ............... 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C

LT1184 Features

Wide Input Voltage Range: 3V to 30V
Low Quiescent Current
High Switching Frequency: 200kHz
CCFL Switch: 1.25A, LCD Switch: 625mA
Grounded or Floating Lamp Configurations
Open-Lamp Protection
Positive or Negative Contrast Capability

LT1184 Typical Application

Notebook and Palmtop Computers
Portable Instruments
Automotive Displays
Retail Terminals

LT1184 Connection Diagram

LT1184 Connection Diagram

LT1184 datasheet

LT1184
PDF/DataSheet Download

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    The LT®1182/LT1183 are dual current mode switchingregulators that provide the control function for Cold Cath-ode Fluorescent Lighting (CCFL) and Liquid Crystal Display(LCD) Contrast. The LT1184/LT1184F provide only theCCFL function. The ICs include high ...

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