LXM1653-01

·  FULLY FLOATING OUTPUT
· 35% MORE LIGHT OUTPUT AT 5 WATTS
· GREATER EFFICIENCY THAN GROUNDED OUTPUT DESIGNS
· 6.5V TO 18V INPUT VOLTAGE RANGE
· VERSATILE BRIGHTNESS CONTROL INPUT
· 10 MICROAMP SLEEP CURRENT
· OUTPUT SHORT CIRCUIT PROTECTION AND AUTOMATIC OVER VOLTAGE LIMITING
· 7.4mm MAX HEIGHT, NARROW FOOTPRINT
· MINIMIZE THERMOMETER EFFECTS
· MINIMIZE LAMP TO PANEL LEAKAGE CURRENT

· 11.3" LCD PANELS AND LARGER
· NOTEBOOK AND SUB-NOTEBOOK COMPUTERS
· PORTABLE INSTRUMENTATION
· AUTOMOTIVE DISPLAYS
· DESKTOP DISPLAYS
· AIRLINE ENTERTAINMENT CENTERS

Input Supply Voltage (V_IN) .......................................................... 605V to 18V
Output Voltage, no load ................................ Internally Limited to 2000V_RMS
Output Current ................................................. 8.0mA_RMS (Internally Limited)
Output Power .............................................................................................6W
Input Signal Voltage, (SLEEP and BRITE Inputs) ........................ -0.3V to 6.5V
Ambient Operating Temperature, zero airflow ............................... 0 to 60
Storage Temperature Range .......................................................-40 to 85
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal.

The LXM1653-01 floating output drive CCFL (Cold Cathode Fluorescent Lamp) Inverter Module is specifically designed to drive large LCD displays (11.3" and larger), which are used in notebook computers. This new inverter was specifically designed to reduce the leakage currents from the lamp to the reflector or the metal frame of the panels. The floating output architecture of this inverter also permits a much wider dimming range when compared to non-floating designs, and allows an additional 10% efficiency improvement.

The module LXM1653-01 converts unregulated DC voltage from the system battery or AC adapter directly to high-frequency, high-voltage sine waves required to ignite and operate CCFL lamps. The module design is based on a proprietary Linfinity IC that provides important new performance advances.
 
Remarkable improvements in efficiency and RF emissions result from this single stage resonant inverter, featuring a patented Current Synchronous, Z ero Voltage Switching (CS-ZVS) topology. CS-ZVS produces nearly pure sine wave currents in the lamp, enabling maximum light delivery, while   reducing both conducted and radiated noise. This topology simultaneously performs two tasks including line voltage regulation and lamp dimming through lamp current regulation.These two functions are performed in a single power stage made up of a pair of low-loss MOSFETs. The MOSFETs LXM1653-01 drive a low current resonant circuit that feeds the primary of a high-voltage transformer with a sinusoidal voltage.

Required L and C values in the resonant circuit are such that very lowloss components can be used to obtain higher electrical efficiency than is possible with previous topologies.The full-bridge LXM1653-01 provides peak efficiency when operated at input voltages from 6.5 volts to 18 volts.

In addition, this module is equipped with a dimming input that permits full range brightness control from an external potentiometer or PWM signal, and a sleep input that reduces module power to a few microwatts in shutdown mode.Output open and short circuit protection are also featured on this module LXM1653-01.