TAIYO YUDEN RoHS LS380-RH LCD Backlight Driver Model COMPLIANT 12 Volt Input Single Tube CCFT Inverter Brightness Control Physical Specifications Dimensions: 20mm x 85mm x 7.3mm (0.787" x 3.35" x 0.287") Weight: 10g (0.352 oz.) Operating Temp: 0 to 55C, convection cooling Relative Humidity: 20% to 90%, non-condensing Storage: -20 to 85C/5-95% RH, non-condensing Impact Resistance: 50G half wave per 2 msec Vibration Resistance: 10-55-10 Hz/min @ 1.5mm Input Specifications* Item Condition Standard -- Continuous Operation Starting Condition (Discharge Starting Voltage) 12 Vdc 10 Vdc - 16 Vdc 10 Vdc - 16 Vdc Max. Input Current VIN = 10 Vdc Luminance @ Max. 0.5 A Input Current Control terminal H = (VIN) VIN = 16 Vdc 3.0 A (Lamp Off) Max. Rush Current VIN = 16 Vdc Luminance @ Max. 3.0 Azero-p/0.3 mS Max. Input Power VIN = 16 Vdc Luminance @ Max. 3.5 W Control Terminal Input Current Control Terminal L = 0.0 - 0.4 Vdc VIN = 16 Vdc ILOW = -0.4 mA (Lamp Lighting) Control Terminal H = Open -- (Lamp Off) Input Voltage Rated Tolerance *Above specifications occur @ 25 5C. Output Specifications* Item Condition Standard MIN TYP MAX Output Voltage (Vrms) VIN = 12 Vdc -- 1500 -- Tube Current (mArms) Luminance @ Max. Luminance @ Min. 5.5 -- 6.5 3.0 7.5 -- Max. Power Output (W) VIN = 12.0 Vdc/Luminance @ Max. -- -- 3.5 Ignition Frequency (kHz) Luminance @ Max. 30 40 50 DC/DC Converter Frequency (kHz) Luminance @ Max. -- 80 -- *Above specifications occur @ 25 5C & VIN = 10 - 16 Vdc. Model LS380-RH Insulating Withstand Voltage Item Rating Description Insulating Withstand Voltage Primary - Secondary 1.5 kVA Impulse Insulating Resistance Primary - Secondary Winding - Core 500 Vdc More than 100 M Luminance Variance Item Condition Standard Luminance @ Max. Btwn. pin 4 & pin 5 0.0 Luminance @ Min. Btwn. pin 4 & pin 5 10 k 850.5 5 5 LS380 1 140.3 1 3 14.0 600.3 3 200.5 11.0 7.3 MAX Lot Symbol 6.5 MAX 0.8TYP 2-o3.0 (c) Copyright 2007 TAIYO YUDEN (U.S.A.), INC. Specifications subject to change without notice. TAIYO YUDEN (U.S.A.), INC. 440 Stevens Avenue, Suite 300 Solana Beach, CA 92075 (858) 350-6800 / Fax: (858) 350-6854 (800) 263-4532 www.t-yuden.com inverters@t-yuden.com FM 32227 Model LS380-RH Tech Notes Connection Diagram LS380-RH CN1 Molex 53261-0571 CN2 JST SM02(8.0)B-BHS-1-TB(LF) On/Off Control The on/off control is achieved by using the on/off pin on the input side of LS380. The circuit for the remote on/off circuitry consists of an active low TTL switch. When the circuit is open, the IC Vcc is cut off. When the circuit is closed, IC Vcc is activated. A mechanical switch or a TTL/CMOS gate needs to be placed between the remote on/off pin and ground creating a condition where the circuit is closed to activate the inverter. Either one of the following will be required for the inverter to operate: One recommended use of logic switch for remote on/off is shown in the diagram below. Electrical specification for on/off terminal is Low 0 to 0.4V, -0.4 mA or higher when switch is closed. 1. Tie on/off pin to ground. 2. Add mechanical switch between on/off pin and ground, close switch. 3. Add TTL/CMOS switch between on/off and ground. Circuit must be closed for unit to operate (as shown above right). (c) Copyright 2007 TAIYO YUDEN (U.S.A.), INC. Specifications subject to change without notice. TAIYO YUDEN (U.S.A.), INC. 440 Stevens Avenue, Suite 300 Solana Beach, CA 92075 (858) 350-6800 / Fax: (858) 350-6854 (800) 263-4532 www.t-yuden.com inverters@t-yuden.com FM 32227 Model LS380-RH Tech Notes Output Current Optimization Method Maximum output current can be adjusted by applying bias voltage or using a solid resistor as shown below. R1 Minimum Typ. Output Current 1 On/Off 2 V(in) 3 Gnd N/A 270 820 1.6 K 2.7 K 3.8 K 5.6 4 Gnd Notes: R1 Brightness DC Bias dimming by using a variable resistor 1 On/Off 2 V(in) 3 Gnd 4 Gnd mA mA mA mA mA mA mA 7.5 6.5 6.0 5.5 5.0 4.5 4.0 mA mA mA mA mA mA mA Allowable maximum input current for backlight CCFT is stipulated on the LCD specification. Please select resistor value per requirements on the panel. For more information, please contact Taiyo Yuden (USA), Inc. 10 Kohm (External) 5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Maximum Output Current Output Current 0V 0.1 V 0.2 V 0.3 V 0.4 V 0.5 V 0.6 V 0.7 V 0.8 V 0.9 V 1.0 V 6.42 6.00 5.58 5.20 4.70 4.43 4.05 3.64 3.23 2.86 2.48 mA mA mA mA mA mA mA mA mA mA mA 7.00 DC Voltage Bias (0 - 1.0 Vdc) 6.00 Brightness dimming by applying DC bias voltage 5.00 Output Current 5 4.00 3.00 2.00 1.00 0.00 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 DC Bias (Vdc) Mean Time Between Failures (MTBF) By using the MIL-HDBK 217E Condition Ground Benign method, the MTBF for the LS380 is calculated at 1,121,453 hours. (c) Copyright 2007 TAIYO YUDEN (U.S.A.), INC. Specifications subject to change without notice. TAIYO YUDEN (U.S.A.), INC. 440 Stevens Avenue, Suite 300 Solana Beach, CA 92075 (858) 350-6800 / Fax: (858) 350-6854 (800) 263-4532 www.t-yuden.com inverters@t-yuden.com FM 32227