Document 788
Flyback Transformers
For STMicroelectronics PM8803
PoE Plus Powered Device Controller
• Designed to operate at 250 kHz in continuous conduction
mode with 42 – 57 Volts input
• 1500 Vrms, one minute isolation from the primary and bias
windings to the secondary windings
Core material
Ferrite
Terminations
RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight
6.5 g
Ambient temperature
–40°C to +85°C
Storage temperature
Component: –40°C to +85°C.
Tape and reel 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
175 per 13″ reel Plastic tape: 32 mm wide,
0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth
PCB washing
Only pure water or alcohol recommended
Part
number
1
HA3691-AL_
JA4173-AL_
Inductance Inductance
DCR max (Ohms)
4
Power
at 0 A
2
at
Ipk
3
(W) ±10% (µH) min (µH)
pri
sec
bias
20
20
100
100
90.0
90.0
0.185 0.0085 0.340
0.211 0.0060 0.404
Leakage
Turns ratio
6
inductance
5
max (µH)
pri : sec pri : bias
0.805
1.60
1
:
0.25
1
:
0.469
1
:
0.156 1
:
0.50
Ipk
3
(A)
1.3
1.3
Output
7
5 V, 4 A
3.3 V, 6 A
1. When ordering, please specify
packaging
code:
HA3691-ALD
Packaging: D
= 13″ machine-ready reel. EIA-481 embossed plastic tape (175 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 measured at 250 kHz, 0.2 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. DCR for the secondary is with windings connected in parallel.
5. Leakage inductance is for the primary and is measured with the secondary shorted.
6. Turns ratio is with the secondary windings connected in parallel.
7. Output of the secondary is with the windings connected in parallel. Bias winding output
is 10 V, 20 mA.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Dot above pin1
0.500 max
12,70
0.039
1,00
0.004 /0,10
0.699 max
17,75
0.512
13,00
1
10
0.080
2,03
0.590
14,99
0.050
1,27
0.028
0,70
Recommended
Land Pattern
1
0.530 max
13,46
Secondary windings to be connected
in parallel on PC board
0.098
2,50
5
6
inches
Dimensions are in
mm
0.098
2,50
These parts are preproduction products for electrical evaluation only.
US
+1-847-639-6400 sales@coilcraft.com
Specification subject to change without notice.
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
Document 788
Revised 03/31/11
© Coilcraft Inc. 2013
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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