CCFL-Inverter
SCF-0275
■Features
●
For CCFL 4 lamps
●
Built in On/Off control function
●
Regulated lamp current
●
Built in PWM Mode dimming control circuit.
●
Applications: LCD size 15 inches for monitor
Suitable Sanken's CCFL: Lamp length 300 to 340 mm
: Exterior Diameter φ2.6mm
■Outline
For 4W ✕ 4 Lamps
( )
0.5
±
120.0
0.2
(3.5)
113.0
±
(3.5)
(3.5)
Top View
0.2
0.5
±
4-φ3.0
CN2
CN1
CN3
43.0
±
50.0
Side View
8.2max
PWB (Printed wiring board): FR-4 or CEM-3 (t =1.0)
Weight: 39.5g typ
Unit : mm
■Connector terminal number and Function
Connector No.
✽
CN1
(Input)
CN 2
(Output 1, 2)
CN 3
(Output 3, 4)
✽Connect parallel with 1st and 2nd pin, in the same way 3rd and 4th pin too. It's short of current capacity with mono-pin.
Terminal No.
1, 2
3, 4
5
6
7
1
2
4
1
2
4
Symbol
V
IN
GND
Vbr
N. C
Vrmt
Lamp1-H
Lamp 2-H
Lamp1, 2-L
Lamp 3-H
Lamp 4-H
Lamp 3, 4-L
Function
DC input voltage
GND
Dimming control
On-Off control
Output 1 high side
Output 2 high side
Output 1, 2 low side
Output 3 high side
Output 4 high side
Output 3, 4 low side
Connector type name/Manufacturer
S7B-PH-SM3-TB/JST
SM03 (7-D1)B-BHS-TB/JST
SM03 (7-D1)B-BHS-TB/JST
■Standard External Circuit
CN1
1, 2
V
7
3, 4
5
IN
Vrmt
GND
Vbr
(for Dimming)
Lamp(1,3)-H
Lamp(2, 4)-H
Inverter Unit
0 to 2.5V
H
SW
L
12V
SW H: enable 2.5V to V
L : disable 0 to 0.5V
IN
■Absolute maximum ratings
Parameter Symbol Ratings Unit
DC input voltage
On-Off voltage
Dimming voltage
Output power
Operating temp.
Storage temp.
Humidity
V
Vrmt
Vbr
P
Topr
Tstg
RH
0 to 14.4
IN
0 to 14.4
0 to 3.0
L
4.4
0 to 60
–20 to 80
95
Lamp-L
V
V
V
W
°C
°C
%RH
CN2,3
1
2
4
R
L
Cold-Cathode
Fluorescent
Lamp
R
L
Remarks
Per 1 lamp
Maximum wet-bulb temp. 38°C
No dew condensation
SCF-0275
■Electrical characteristics
Parameter
DC input voltage
Input current
Driving frequency
Output current
Dimming control frequency
Output Power
Open voltage
Symbol
V
IN
I
IN
f
sw
I
L
f
PWM
P
L
V
O
min
10.8
—
50
—
—
240
—
1500
■Dimming characteristics
16.0
I
2
12.0
rms)
8.0
4.0
Output Current (mA
0.0
0.0
0.5 1.0 1.5 2.0
L
I
1
L
Dimming voltage (V
Ratings
typ max
12
—
55
7.0
3.5
4.7
—
2.5 3.0 3.5
br)
(2 Lamps)
Conditions : at Topr=25°C, VIN=12V (unless otherwise stated)
=12V
=83kΩ
=83kΩ
=10.8V, R
Remarks
=83kΩ, Vbr=0V
L
=83kΩ, Vbr=2.5V
L
=100MΩ
L
13.2
1500
60
—
—
300
—
—
Unit
V
mA
kHz
mArms
mArms
Hz
W
Vrms
V
IN
R
L
Per 1 lamp R
Per 1 lamp R
R
L
V
IN