Datasheet 3D Models

High Power 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
Perfect solution for high power PoE applications including Smart Building and IoT

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Typical Application

Works with Texas Instruments PM8804

Part number	Input Voltage	Output	Power	Fsw
MA5509-CLD	36 V — 72 V	3.3 V , 20 A	66 W	-
NA6083-BLD	36 V — 72 V	5 V , 20 A	100 W	250 kHz
RA7129-BLD	36 V — 72 V	5 V , 20 A	100 W	-

Specifications

Electrical specifications at 25°C.

Active Clamp Forward Transformer

Part number (Hover for schematics)	Inductance at 0A (µH) 1	Tolerance (%)	DCR max			Leakage Inductance max (µH) 2	Turns Ratio	Isolation Voltage (Vrms) 3
Part number (Hover for schematics)	Inductance at 0A (µH) 1	Tolerance (%)	Pri (Ω)	Sec (mΩ)	Aux/Bias (mΩ)	Leakage Inductance max (µH) 2	Pri : Sec : Aux/Bias	Isolation Voltage (Vrms) 3
MA5509-CLD	70	10	0.059	2.800	300.000	0.838	1 : 0.2 : 0.533	1500
RA7129-BLD	134	25	0.027	3.500	174.000	0.180	1 : 0.333 : 0.667	1500

Flyback Transformer

Part number (Hover for schematics)	Inductance at 0A (µH) 1	Tolerance (%)	Inductance min (µH)	DCR max			Leakage Inductance max (µH) 2	Turns Ratio	Isolation Voltage (Vrms) 3
Part number (Hover for schematics)	Inductance at 0A (µH) 1	Tolerance (%)	Inductance min (µH)	Pri (Ω)	Sec (mΩ)	Aux/Bias (mΩ)	Leakage Inductance max (µH) 2	Pri : Sec : Aux/Bias	Isolation Voltage (Vrms) 3
NA6083-BLD	70	10	60 @ 3.5 A	0.111	6.000	660.000	1.820	1 : 0.2 : 0.6	1500

Notes

Inductance for is for the primary, measured at 250 kHz, 0.2 Vrms, 0 Adc.
Leakage inductance is for the primary winding with the secondary windings shorted.
Isolation (hipot) is measured for one minute: 1500 Vrms from primary and aux/bias to secondary; 500 Vrms from primary to aux/bias.

Termination:

RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

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).

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: −40°C to +165°C
Tape and reel packaging: −40°C to +80°C

Maximum part temperature:

+165°C (ambient + self-heating)

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Schematics

Connect pin 1 to 2 and pin 3 to 4 on the PC board.
Connect pins 10, 11, and 12 together and
pins 7, 8, and 9 together on the PC board.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
175	330	100	13	50,4	44,4	44	32	4	2	12,0	0,5

General specification

Core Material:

Ferrite

Weight:

11.5 – 13.5 g

Packaging:

175 per 13″ reel Plastic tape: 44 mm wide, 0.5 mm thick, 32 mm pocket spacing, 12 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

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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High Power Transformers

for Power over Ethernet

Selected configuration not available

Typical Application

Specifications

Active Clamp Forward Transformer

Flyback Transformer

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Warning