开关稳压器 LT1184 - CCFL/LCD Contrast Switching Regulators
DESCRIPTION
The LT® 1182/LT1183 are dual current mode switching regulators that provide the control function for Cold Cathode Fluorescent Lighting CCFL and Liquid Crystal Display LCD Contrast. The LT1184/LT1184F provide only the CCFL function. The ICs include high current, high efficiency
switches, an oscillator, a reference, output drive logic, control blocks and protection circuitry.
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
APPLICATIONS
■ Notebook and Palmtop Computers
■ Portable Instruments
■ Automotive Displays
■ Retail Terminals
