TTAAIIYYOOYYUUDDEENN
LS655-RH
Model
LCD Backlight Driver
Input Specifications*
Item Condition Standard
Input Voltage
Rated — 5 Vdc
Tolerance Continuous Operation 4.75 V - 5.25 V
Starting Condition (Discharge Starting Voltage) 4.75 V - 5.25 V
Max. Input Current VIN = 5 Vdc 950 mA Typ.
Luminance @ Max.
Max. Input Power VIN = 5 Vdc 4.8 W
Luminance @ Max.
DC-Bright IOUT = Max 1.9 V
IOUT = Min 1.5 V
DC-Resistor IOUT = Max 10 kΩ
IOUT = Min 0 kΩ
*Above Specifications Occur @ 25 ± 5ºC
5 Volt Input
Dual Tube CCFT Inverter (4W)
Brightness Control
Output Specifications*
Item Condition Standard
MIN TYP MAX
Output Voltage (Vrms) VIN = 5 Vdc — 1000 —
Tube Current for per Lamp (mArms) Luminance @ Max.(VBR = 1.9 V @ 10 kΩ) — 5.2 —
Luminance @ Min. (VBR = 1.5 V @ 0 kΩ) — 2.2 —
Max. Power Output for 2 Lamps (W) VIN = 5 Vdc/Luminance @ Max. — 4.0 —
Ignition Frequency (kHz) Luminance @ Max. — 55 —
*Above specifications occur @ 25 ± 5ºC.
Physical Specifications
Dimensions: 105mm x 25mm x 10mm
(4.13" x 0.98" x 0.39")
Operating Temp: 0 to 60°C, convection cooling
Relative Humidity: 20% to 90%, non-condensing
Storage: -20 to 85°C/5-95% RH
Impact Resistance: 50G half wave per 2 msec
Vibration Resistance: 10-55-10 Hz/min @ 1.5mm
RoHS
COMPLIANT
LS655-RH
Model
Luminance Variance
Item Condition Applied Voltage Output Current
Luminance @ Max. Btwn. pin 6 and GND, or pin 5 & 6 Vbr = 1.9 V or 10 kΩ5.2 mA (one lamp)
Luminance @ Min. Btwn. pin 6 and GND, or pin 5 & 6 Vbr = 1.5 V or 0 kΩ2.2 mA (one lamp)
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
Connection Diagram
LS655-RH
DC Bright Control Method*
Maximum output current can be adjusted by applying bias
voltage or using a variable resistor as shown below.
preset to maximum brightness
(continuous)
dimming by applying DC bias voltage
dimming by using a variable resistor
5 Vdc 5 Vdc
3
2
VIN
1
VIN
VBRH
VBRL
4
5
6
GND
GND
Variable
Resistor
(0-10 kΩ
20%-100%)
DC Voltage
Bias
(1.5-1.9 Vdc
20%-100%)
5 Vdc
3
2
VIN
1
VIN
VBRH
VBRL
4
5
6
GND
GND
3
2
VIN
1
VIN
VBRH
VBRL
4
5
6
GND
GND
LS655-RH
Model
Tech Notes
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
