B0863-BL Datasheet, PDF (1/2 Pages) Coilcraft lnc. – PoE Transformer

Document 379-1
PoE Transformer ForMaximMAX5941B
PoE Interface/PWMController
• Designed for forward topology
• Operates at 275 kHz, at a 50% duty cycle
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 5.6 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°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,
0.35 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth
PCB washing Only pure water or alcohol recommended
Part
Inductance²
number¹ min (µH)
B0863-BL_
165
DCR max³
(Ohms)
0.061 (pri)
1.00 (reset)
1.29 (bias)
0.020 (drive)
0.008 (sec)
Leakage
inductance⁴
max (µH)
0.75
Input
voltage
range (V)
28 – 60
Turns ratio⁵
pri : sec 1 : 0.29
pri : reset 1 : 1
pri : drive 1 : 0.24
pri : bias 1 : 1.3
Isolation⁶
1500 Vrms
1. When ordering, please specify a packaging code:
B0863-BLD
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 10 kHz, 0.1 Vrms, 0 Adc.
3. DCR for the secondary is measured with the windings connected in parallel.
4. Leakage inductance is for the primary and is measured with all other windings shorted.
5. Turns ratio is with the secondary windings connected in parallel.
6. Isolation is measured from the primary, reset and bias windings to the secondary and drive windings.
7. Output is with the secondary windings connected in parallel.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
1
Primary
3
2
Reset
4
5
Bias
6
Output⁷
3.3 V, 4 A
12
11
Secondary
10
9
8
Drive
7
Secondary windings to be connected in
parallel on PC board.
© Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
Document 379-1 Revised 10/28/08