© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
CCFLTransformers
Document 293 -1
Document 293-1
Revised 02/10/09
1. When ordering, please specify a packaging code:
FL2810-1L
D
Packaging: D =13
″ machine ready reel. EIA-481 embossed plastic
tape.
Package 1: 400 parts per full reel.
Package 4: 750 parts per full reel.
Package 5: 1000 parts per full reel.
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter D instead.
2. Inductance is measured across both halves of the primary.
3. Vrms = continuous voltage.
4. Vinst = instantaneous voltage at startup.
5. Ambient operating temperature range
−40°C to +85°C.
6. Electrical specifications at 25°C.
Part
Turns ratio
Output Inductance2
Imax
Vrms3
Vinst max4
DCR max (Ohms)
number1
Schematic Package pri : sec
pri : fb
(Watts)
nom (µH)
sec (mA) pri
sec
pri
sec
pri
sec
fb
FL2015-1L_
B
1
1 : 67
1 : 0.19
6.0
43
5.0
22
1600
25.0
2000
0.220
285
0.10
FL2015-2L_
A
1
1 : 67
1 : 0.19
6.0
43
5.0
23
1600
29.0
2000
0.220
285
0.10
FL2015-3L_
A
1
1 : 100
1 : 0.25
6.0
19
5.0
16
1600
20.0
2000
0.190
285
0.10
FL2015-4L_
A
1
1 : 50
1 : 0.14
6.0
44
7.0
32
1600
40.0
2000
0.220
165
0.10
FL2015-5L_
A
1
1 : 125
1 : 0.38
6.0
20
7.0
12
1600
16.0
2000
0.160
330
0.10
FL2015-6L_
B
1
1 : 67
1 : 0.19
6.0
48
11.0
23
1600
29.0
2000
0.160
176
0.10
FL2015-7L_
A
1
1 : 67
1 : 0.19
6.0
50
11.0
23
1600
29.0
2000
0.160
176
0.10
FL2015-8L_
A
1
1 : 86
1 : 0.21
6.0
31
11.0
18
1600
23.0
2000
0.132
176
0.10
FL2015-9L_
A
1
1 : 100
1 : 0.25
6.0
22
11.0
16
1600
20.0
2000
0.132
176
0.10
FL2015-10L_
A
1
1 : 93
1 : 0.25
4.5
40
11.0
17
1600
21.0
2000
0.175
675
0.50
FL3209-5L_
C
5
1 : 100
—
3.5
48
5.0
16
1600
20.0
2000
0.350
362
—
FL3209-6L_
D
5
1 : 93
1 : 0.17
3.5
40
5.0
17
1600
21.0
2000
0.400
800
0.08
FL2810-1L_
C
4
1 : 100
—
4.5
35
7.0
15
1500
16.5
1650
0.220
500
—
C
2
3
6
4
7
Primary
Secondary
2
1
A
3
5
8
4
9
Primary
Secondary
Feedback
Primary
Secondary
Feedback
B
2
1
3
5
3
4
9
D
1
2
3
4
6
5
7
Primary
Secondary
Feedback
Schematics
The FL Series of transformers is designed for use in cold
cathode fluorescent lamp (CCFL) power supplies at op-
erating frequencies up to 100 kHz. With output power
from 3.5 to 6.0 Watts, these transformers are ideal for
LCD backlight applications. They are available in two
different gull wing, surface mount packages and one in-
board configuration for height restricted designs.
Free evaluation samples are available by contacting
Coilcraft or ordering them on-line at www.coilcraft.com.
For Royer
For Royer
For flyback
For Royer
topology
topology
topology
topology
FL3209 parts have been improved.
FL3209 parts have been improved.
FL3209 parts have been improved.
FL3209 parts have been improved.
FL3209 parts have been improved.
The new FL3209-5L and FL3209-6L are electrically
equivalent to the FL3209-1L, FL3209-2L, FL3209-3L
and FL3209-4L, and have an improved physical de-
sign. We will continue to support existing customers
of the superseded parts.
Isolation (tested for one minute)
Part
Primary to
Primary to
All windings
number
secondary
feedback
to core
FL2015
1500 Vrms
500 Vrms
1500 Vrms
FL3209
500 Vrms
500 Vrms
1500 Vrms
FL2810
1500 Vrms
—
1500 Vrms
Note: For Schematic B, primary is connected to secondary at
pin 3. The primary is not isolated from the secondary.
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