High Power Flyback Transformers for Power over Ethernet (PoE) | Coilcraft
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High Power Flyback Transformers for
Power over Ethernet

  • Developed for STMicroelectronics ST PM8804 and ST PM8805
  • Optimized for STMicroelectronics high-power PoE PD controller
    evaluation board STEVAL-POE00xV1
  • Designed to meet IEEE802.3bt standard
  • Operates at 250 KHz with 36 – 72 V input
  • Perfect solution for high power PoE applications including Smart Building and IoT
  • 1500 Vrms, 1 minute isolation (hipot) from primary to auxillary/bias to secondary
  • RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel over phos bronze terminations

SPECIFICATIONS


Active Clamp Forward Transformer

Part number1
Click to get parts
L at
0 A2
(µH)
L at
3.5 A3
(µH)
DCR (Ohms) Leakage4
L max
(µH)
Turns ratio Output Isolation5
(Vrms)
pri sec aux/bias pri : sec : aux/bias
RA7129-BLD 134±25% 0.265 0.0035 0.174 0.180 1 : 0.333 : 0.667 5 V, 20 A 1500
MA5509-CLD 70±10% 0.265 2.8 130 0.38 1 : 0.215 : 0.5 3.3 V, 20 A 1500

Flyback Transformer

Part number1
Click to get parts
L at
0 A2
(µH)
L at
3.5 A3
(µH)
DCR (Ohms) Leakage4
L max
(µH)
Turns ratio Output Isolation5
(Vrms)
pri sec aux/bias pri : sec : aux/bias
NA6083-BLD 70±10% 60 0.265 9.2 108 0.17 1 : 0.5 : 0.5 5 V, 20 A 1500
1 Packaging: D = 13" machine-ready reel
EIA 481 embossed plastic tape (175 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
2 Inductance is for the primary, measured at 250 kHz, 0.2 Vrms, 0 Adc
3 Inductance is for the primary, measured at 250 kHz, 0.2 Vrms, 3.5 Adc
4 Leakage inductance is for the primary winding with the secondary windings shorted.
5 Isolation (hipot) is measured for one minute: 1500 Vrms from primary and aux/bias to secondary; 500 Vrms from primary to aux/bias.
6 Ambient temperature range: −40°C to +125°C
7 Storage temperature range: Component: −40°C to +165°C
Tape and reel packaging: −40°C to +80°C
8 Resistance to soldering heat: Max three reflows at +260°C for 40 seconds, allowing parts to cool to room temperature between cycles.
9 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.

Your comments and suggestions are welcome. Contact [email protected]
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Updated: November 13, 2018