© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Flyback Transformers
Document 696
Document 696
Revised 10/28/08
L at 0 A2 Lat Ipk3
Leakage L5
Part
±10%
min
DCR max (Ohms)
max (µH)
Turns ratio
Ipk3
Drive
number1
(µH)
(µH)
pri
sec4
drive
bias
pri
drive
pri:sec6 pri:drive pri:bias
(A)
Output7
output
HA3801-AL_ 166.5
150.0
0.735 0.0225 0.510 0.985 2.50
0.45
6.5:1
3.7:1
2.0:1
1.2
3.3 V, 3 A
5.6 V, 10 mA
HA3802-AL_ 150.0
135.0
0.520 0.0275 0.525 0.770 2.00
0.40
5.0:1
3.2:1
2.25:1
1.2
5.0 V, 2 A
7.5 V, 10 mA
HA3803-AL_ 166.5
150.0
0.760 0.101
0.500 1.10
2.05
0.245
2.0:1
4.0:1
2.0:1
1.2 12 V, 0.83 A 6.0 V, 10 mA
9
11
3
5
Primary
2
1
Bias
Secondary
Drive
8
7
12
10
For TI TPS23753 PoE Interface
and Converter Controller
0.135
3,43
0.07
1,79
0.335
8,51
0.079
2,01
0.865
21,97
0.590
14,98
0.677
17,20
0.693
17,60
0.665
16,88
0.028
0,72
0.098
2,5
0.098
2,5
max
Dot indicates pin 1
max
max
1
12
HA380x-AL
6
7
112
Recommended
Land Pattern
0.004 /0,10
1. When ordering, please specify packaging code:
HA3803-AL
D
Packaging: D =13
″ machine ready reel. EIA-481 embossed plastic
tape (200 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 for the primary, measured at 100 kHz, 0.1 Vrms.
3. Peak primary current drawn at minimum input voltage.
4. DCR for secondary is with windings connected in parallel.
5. Leakage inductance for the primary is with the secondary and drive
windings shorted; leakage inductance for the drive winding is with the
secondary windings shorted.
6. Turns ratio is with both secondary windings connected in parallel.
7. Output of the secondary is with the windings connected in parallel.
10 W output from 36 – 57 V PoE input or 24 V adapter; 6 W output from
12 V adapter. Bias winding output is 10 V, 20 mA.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
The secondary windings are to be
connected in parallel on the PC board.
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 5.0 – 5.3 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 200 per 13
″ reel Plastic tape: 44 mm wide,
0.4 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth
PCB washing Only pure water or alcohol recommended
• Isolated synchronous flyback transformers developed for
Texas Instruments TPS23753 for use at 125 kHz. Listed as
T2 on SLVU245 for evaluation module TPS23753EVM.
• Windings optimized for hiccup overload protection
• 1500 Vrms isolation primary and bias to secondary windings
Dimensions are in
inches
mm
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