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SMT PoE Transformers
for 7 Watt Applications

  • Developed for Texas Instruments LM5070 PoE Interface
  • IEEE 802.3af compliant for 7 W PoE applications
  • Industry standard EP10 surface mount package
  • Three different output current and voltages
  • Designed to operate in continuous mode at 250 kHz with input voltage of 36 – 72 Vdc
  • 1500 Vrms isolation from primary and bias to secondary
  • RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations

SPECIFICATIONS


Part number1
Click for samples
L at 0 A2
±10% (µH)
L at Ipk3
min (µH)
DCR max (Ohms)4 Leakage
L max5
(µH)
Turns ratio6 Ipk2
(A)  
Output7
pri bias sec pri : sec pri : bias
C1587-AL_ 155.0 139.5 0.414 0.822 0.036 4.00 : 0.19 : 0.667 0.65 3.3 V, 2.12 A
C1588-AL_ 155.0 139.5 0.414 0.822 0.060 3.60 : 0.262 : 0.667 0.65 5.0 V, 1.4 A
C1589-AL_ 155.0 139.5 0.414 0.822 0.343 3.25 : 0.667 : 0.667 0.65 12 V, 0.6 A
1 When ordering, please specify packaging code: e.g. C1589-ALD
Packaging: D = 13" reel, machine-ready 
EIA-481 embossed plastic tape.
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 Ipk is peak primary current drawn at minimum input voltage.
4 DCR for the secondary is per winding, measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance is measured between pins 3 and 4 with all other windings 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 12 V, 20 mA.
8 Ambient temperature range: −40°C to +85°C
9 Storage temperature range: Component: −40°C to +85°C
Tape and reel packaging: −40°C to +80°C
10 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
11 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: April 10, 2017