TAIYO YUDEN
RoHS
LS380-RH
Model
LCD Backlight Driver
COMPLIANT
12 Volt Input
Single Tube CCFT Inverter
Brightness Control
Physical Specifications
Dimensions:
Weight:
Operating Temp:
Relative Humidity:
Storage:
Impact Resistance:
Vibration Resistance:
20mm x 85mm x 7.3mm
(0.787" x 3.35" x 0.287")
10g (0.352 oz.)
0 to 55°C, convection cooling
20% to 90%, non-condensing
-20 to 85°C/5-95% RH, non-condensing
50G half wave per 2 msec
10-55-10 Hz/min @ 1.5mm
Input Specifications*
Item
Condition
Standard
Input Voltage
Rated
Tolerance
Max. Input Current
Input Current
—
Continuous Operation
Starting Condition (Discharge Starting Voltage)
V
IN
= 10 Vdc
Luminance @ Max.
Control terminal
H = (V
IN
)
V
IN
= 16 Vdc
V
IN
= 16 Vdc
Luminance @ Max.
V
IN
= 16 Vdc
Luminance @ Max.
Control Terminal
L = 0.0 - 0.4 Vdc
V
IN
= 16 Vdc
Control Terminal
H = Open
12 Vdc
10 Vdc - 16 Vdc
10 Vdc - 16 Vdc
0.5 A
3.0 µA (Lamp Off)
3.0 Azero-p/0.3 mS
3.5 W
I
LOW
= -0.4 mA
(Lamp Lighting)
—
(Lamp Off)
Max. Rush Current
Max. Input Power
Control Terminal
Input Current
*Above specifications occur @ 25 ± 5ºC.
Output Specifications*
Item
Condition
Standard
MIN
TYP
MAX
Output Voltage (Vrms)
Tube Current (mArms)
Max. Power Output (W)
Ignition Frequency (kHz)
DC/DC Converter Frequency (kHz)
V
IN
= 12 Vdc
Luminance @ Max.
Luminance @ Min.
V
IN
= 12.0 Vdc/Luminance @ Max.
Luminance @ Max.
Luminance @ Max.
—
5.5
—
—
30
—
1500
6.5
3.0
—
40
80
—
7.5
—
3.5
50
—
*Above specifications occur @ 25 ± 5ºC & V
IN
= 10 - 16 Vdc.
Model
LS380-RH
Insulating Withstand Voltage
Item
Rating Description
Insulating Withstand Voltage
Insulating Resistance
Primary - Secondary
Primary - Secondary
Winding - Core
1.5 kVA Impulse
500 Vdc
More than 100 MΩ
Luminance Variance
Item
Condition
Standard
Luminance @ Max.
Luminance @ Min.
Btwn. pin 4 & pin 5
Btwn. pin 4 & pin 5
0.0
Ω
10 kΩ
85±0.5
11.0
20±0.5
1
5
60±0.3
14.0
14±0.3
Lot Symbol
6.5 MAX
7.3 MAX
3
2–ø3.0
© Copyright 2007 TAIYO YUDEN (U.S.A.), INC. Specifications subject to change without notice.
5
LS380 1
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
0.8TYP
3
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).
© 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
Maximum
Output Current
1
R1
2
On/Off
V(in)
3
Gnd
N/A
270
Ω
820
Ω
1.6 KΩ
2.7 KΩ
3.8 KΩ
5.6
Ω
Notes:
3.0
3.0
3.0
3.0
3.0
3.0
3.0
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
4
10 Kohm
(External)
5
Gnd
Brightness
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
DC
Bias
Output
Current
1
On/Off
2
V(in)
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
3
Gnd
4
DC Voltage
Bias
(0 - 1.0 Vdc)
Gnd
7.00
6.00
5
Brightness
5.00
Output Current
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
dimming by applying DC bias voltage
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.
© 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
PCB设计
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