LS655

TAIYO YUDEN LS655 M odel LCD Backlight Driver 12 Volt Input Dual Tube CCFT Inverter Brightness Control Physical Specifications Dimensions: Operating Temp: Relative Humidity: Storage: Impact Resistance: Vibration Resistance: 105mm x 25mm x 10mm (4.13" x 0.98" x 0.39") 0 to 60°C, convection cooling 20% to 90%, non-condensing -20 to 85°C/5-95% RH 50G half wave per 2 msec 10-55-10 Hz/min @ 1.5mm ( 4W) RoHS COMPLIANT Input Specifications* Item Condition Standard Input Voltage Rated Tolerance Max. Input Current Max. Input Power DC-Bright DC-Resistor *Above Specifications Occur @ 25 ± 5ºC — Continuous Operation Starting Condition (Discharge Starting Voltage) VIN = 5 Vdc Luminance @ Max. VIN = 5 Vdc Luminance @ Max. IOUT = Max IOUT = Min IOUT = Max IOUT = Min 5 Vdc 4.75 V - 5.25 V 4.75 V - 5.25 V 950 mA Typ. 4.8 W 1.9 V 1.5 V 10 kΩ 0 kΩ Output Specifications* Item Condition Standard MIN TYP MAX Output Voltage (Vrms) Tube Current for per Lamp (mArms) Max. Power Output for 2 Lamps (W) Ignition Frequency (kHz) *Above specifications occur @ 25 ± 5ºC. VIN = 5 Vdc Luminance @ Max.(VBR = 1.9 V @ 10 kΩ) Luminance @ Min. (VBR = 1.5 V @ 0 kΩ) VIN = 5 Vdc/Luminance @ Max. Luminance @ Max. — — — — — 1000 5.2 2.2 4.0 55 — — — — — M odel LS655 Luminance Variance Item Condition Applied Voltage Output Current Luminance @ Max. Luminance @ Min. Btwn. pin 6 and GND, or pin 5 & 6 Btwn. pin 6 and GND, or pin 5 & 6 Vbr = 1.9 V or 10 kΩ Vbr = 1.5 V or 0 kΩ 5.2 mA (one lamp) 2.2 mA (one lamp) © Copyright 2006 TAIYO YUDEN (U.S.A.), INC. Specifications subject to change without notice. TAIYO YUDEN (U.S.A.), INC. 1770 La Costa Meadows Drive, San Marcos, CA 92078 (760) 510-3200 / Fax: (760) 471-4021 (800) 493-6835 www.t-yuden.com powerproducts@t-yuden.com FM 32227 M odel LS655 Tech Notes Connection Diagram DC Bright Control Method* Maximum output current can be adjusted by applying bias voltage or using a variable resistor as shown below. 1 GND 2 GND 5 Vdc 5 Vdc 1 GND 2 GND 3 VIN 4 Variable Resistor (0-10 kΩ 20%-100%) 3 4 DC Voltage Bias (1.5-1.9 Vdc 20%-100%) VIN VIN VBRL VBRH VIN VBRL VBRH 5 6 5 6 dimming by applying DC bias voltage dimming by using a variable resistor 1 GND 2 GND 5 Vdc 3 4 5 6 VIN VIN VBRL VBRH preset to maximum brightness (continuous) © Copyright 2006 TAIYO YUDEN (U.S.A.), INC. Specifications subject to change without notice. TAIYO YUDEN (U.S.A.), INC. 1770 La Costa Meadows Drive, San Marcos, CA 92078 (760) 510-3200 / Fax: (760) 471-4021 (800) 493-6835 www.t-yuden.com powerproducts@t-yuden.com FM 32227