Input Specifications*
Item Condition Standard
Input Voltage
Rated — 12 Vdc
Tolerance Continuous Operation 10 Vdc - 16 Vdc
Starting Condition (Discharge Starting Voltage) 10 Vdc - 16 Vdc
Max. Input Current VIN = 10 Vdc 0.5 A
Luminance @ Max.
Input Current Control terminal
H = (VIN) 3.0 µA (Lamp Off)
VIN = 16 Vdc
Max. Rush Current VIN = 16 Vdc 3.0 Azero-p/0.3 mS
Luminance @ Max.
Max. Input Power VIN = 16 Vdc 3.5 W
Luminance @ Max.
Control Terminal Control Terminal ILOW = -0.4 mA
Input Current L = 0.0 - 0.4 Vdc (Lamp Lighting)
VIN = 16 Vdc
Control Terminal —
H = Open (Lamp Off)
*Above specifications occur @ 25 ± 5ºC.
12 Volt Input
Single Tube CCFT Inverter
Brightness Control
Output Specifications*
Item Condition Standard
MIN TYP MAX
Output Voltage (Vrms) VIN = 12 Vdc — 1500 —
Tube Current (mArms) Luminance @ Max. 5.5 6.5 7.5
Luminance @ Min. — 3.0 —
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 ± 5ºC & VIN = 10 - 16 Vdc.
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 55°C, convection cooling
Relative Humidity: 20% to 90%, non-condensing
Storage: -20 to 85°C/5-95% RH, non-condensing
Impact Resistance: 50G half wave per 2 msec
Vibration Resistance: 10-55-10 Hz/min @ 1.5mm
TTAAIIYYOOYYUUDDEENN
LS380-RH
Model
LCD Backlight Driver
RoHS
COMPLIANT
LS380-RH
Model
Insulating Withstand Voltage
Item Rating Description
Insulating Withstand Voltage Primary - Secondary 1.5 kVA Impulse
Insulating Resistance Primary - Secondary 500 Vdc
Winding - Core More than 100 MΩ
Luminance Variance
Item Condition Standard
Luminance @ Max. Btwn. pin 4 & pin 5 0.0 Ω
Luminance @ Min. Btwn. pin 4 & pin 5 10 kΩ
20±0.5
14±0.3
1
5
5
1
33
11.0 14.0
2–ø3.0
LS380
0.8TYP
6.5 MAX
7.3 MAX
Lot Symbol
60±0.3
85±0.5
FM 32227
© 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
LS380-RH
Model
Tech Notes
Connection Diagram
LS380-RH
CN1
Molex 53261-0571
CN2
JST SM02(8.0)B-BHS-1-TB(LF)
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.
On/Off Control
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).
FM 32227
© 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
LS380-RH
Model
Tech Notes
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.
Output Current Optimization Method
Maximum output current can be adjusted by applying bias
voltage or using a solid resistor as shown below.
1
2
3
4
5
On/Off
R1
10 Kohm
(External)
V(in)
Gnd
Gnd
Brightness
R1 Minimum Maximum
Typ. Output Current Output Current
N/A 3.0 mA 7.5 mA
270 Ω3.0 mA 6.5 mA
820 Ω3.0 mA 6.0 mA
1.6 KΩ3.0 mA 5.5 mA
2.7 KΩ3.0 mA 5.0 mA
3.8 KΩ3.0 mA 4.5 mA
5.6 Ω3.0 mA 4.0 mA
Notes:
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.
dimming by using a variable resistor
1
2
3
4
5
On/Off
V(in)
Gnd
Gnd
Brightness
DC Voltage
Bias
(0 - 1.0 Vdc)
dimming by applying DC bias voltage
7.00
6.00
5.00
4.00
3.00
Output Current
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)
DC Output
Bias Current
0 V 6.42 mA
0.1 V 6.00 mA
0.2 V 5.58 mA
0.3 V 5.20 mA
0.4 V 4.70 mA
0.5 V 4.43 mA
0.6 V 4.05 mA
0.7 V 3.64 mA
0.8 V 3.23 mA
0.9 V 2.86 mA
1.0 V 2.48 mA
FM 32227
© 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
