Document 293-1
CCFL Transformers
The FL Series of transformers is designed for use in
cold cathode fluorescent lamp (CCFL) power supplies at
operating 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.
Output Inductance2
Imax
Turns ratio
Vrms3
(Watts) nom (µH) sec (mA) pri sec
Vinst max4
pri sec
DCR max (Ohms)
pri sec fb
Part
number1 Schematic Package pri:sec
pri:fb
FL2015-1L_
FL2015-2L_
FL2015-3L_
FL2015-4L_
FL2015-5L_
B
A
A
A
A
1
1
1
1
1
1:67
1:67
1:100
1:50
1:125
1:0.19
1:0.19
1:0.25
1:0.14
1:0.38
6.0
6.0
6.0
6.0
6.0
43
43
19
44
20
5.0
5.0
5.0
7.0
7.0
22 1600
23 1600
16 1600
32 1600
12 1600
25.0 2000 0.220 285 0.10
29.0 2000 0.220 285 0.10
20.0 2000 0.190 285 0.10
40.0 2000 0.220 165 0.10
16.0 2000 0.160 330 0.10
FL2015-6L_
FL2015-7L_
FL2015-8L_
FL2015-9L_
FL2015-10L_
B
A
A
A
A
1
1
1
1
1
1:67
1:67
1:86
1:100
1:93
1:0.19
1:0.19
1:0.21
1:0.25
1:0.25
6.0
6.0
6.0
6.0
4.5
48
50
31
22
40
11.0
11.0
11.0
11.0
11.0
23 1600
23 1600
18 1600
16 1600
17 1600
29.0 2000 0.160 176 0.10
29.0 2000 0.160 176 0.10
23.0 2000 0.132 176 0.10
20.0 2000 0.132 176 0.10
21.0 2000 0.175 675 0.05
FL3209-1L, FL3209-3L Not recommended for new designs. Order FL3209-5L, which is electrically equivalent.
FL3209-2L, FL3209-4L Not recommended for new designs. Order FL3209-6L, which is electrically equivalent.
FL3209-5L_
FL3209-6L_
FL2810-1L_
C
D
C
5
5
4
1:100
1:93
1:100
—
1:0.17
—
3.5
3.5
4.5
48
40
35
5.0
5.0
7.0
16 1600
17 1600
15 1500
20.0 2000 0.350 362
21.0 2000 0.400 800 0.08
16.5 1650 0.220 500
—
—
1. When ordering, please specify a packaging code:
FL2810-1LD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape.
Isolation (tested for one minute)
Part
number
Primary to
secondary
Primary to
feedback
All windings
to core
FL2015
FL3209
FL2810
1500 Vrms
500 Vrms
1500 Vrms
500 Vrms
500 Vrms
—
1500 Vrms
1500 Vrms
1500 Vrms
Package 1: 400 parts per full reel.
Package 4: 750 parts per full reel.
Package 5: 1000 parts per full reel.
Note: For Schematic B, primary is connected to secondary at pin 3.
The primary is not isolated from the secondary.
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 temperature range: −40°C to +85°C.
Storage temperature range: Component: –40°C to +85°C
Tape and reel packaging: –40°C to +80°C
6. Electrical specifications at 25°C.
Schematics
A
B
D
C
1
1
3
2
3
8
6
3
6
7
2
3
4
Primary
Primary
Primary
3
Secondary
Secondary
Primary
Secondary
Secondary
5
2
5
2
4
1
Feedback
Feedback
Feedback
9
9
7
5
4
4
For Royer
topology
For Royer
topology
For full-bridge
topology
For Royer
topology
Document 293-1 Revised 09/13/11
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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