Datasheet 3D Model

GA3271-AL Flyback Transformer

for Maxim MAX5941B PWM Controller

Developed for Maxim MAX5941B PoE Interface/PWM Controller
Designed for 13 W PoE applications
RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations

Buy Now:

Count	Unit price
1	$3.97
200	$3.41
600	$2.97
1200	$2.31
2400	$1.99
5000	$1.82

For high volume or non-stock items, request a quote.

Packaging

D = 13" machine-ready reel

. in stock, ready to ship today.

Request a Sample:

Typical Application

Works with Maxim MAX5941B

Input Voltage	Output 1		Power	Fsw
Input Voltage	Sec	Bias	Power	Fsw
30 V — 60 V	12 V , 1 A	15 V , 0.02 A	13 W	275 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1 A (µH)	DCR max 4			Leakage Inductance max (µH) 5	Turns Ratio 6	Isolation Voltage (Vrms) 7
Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1 A (µH)	Pri (Ω)	Sec (mΩ)	Bias (mΩ)	Leakage Inductance max (µH) 5	Pri : Sec : Bias	Isolation Voltage (Vrms) 7
GA3271-ALD	117.5	104.0	0.201	60.000	335.000	0.815	1 : 0.457 : 0.571	1500

Notes

Output of the secondary is with the windings connected in parallel. Bias winding output is 15 V, 20 mA
When ordering, please specify termination and packaging codes: GA3271-ALD.
Inductance is for the primary, measured at 250 kHz, 0.1 Vrms.
DCR for the primary and for the secondary are with the windings connected in parallel.
Leakage inductance is for the primary windings with the secondary windings shorted.
Turns ratios are with the primary the secondary windings connected in parallel.
1500 Vrms, one minute primary to secondary isolation.

Termination:

L = RoHS tin-silver over tin over nickel over phos bronze.
T = RoHS tin-silver-copper (95.5/4/0.5). (Special order, added cost)
S = non-RoHS tin-lead (63/37). (Special order)

Packaging:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (200 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C

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

See FIT/MTBF Calculations

Schematics

Primary windings and secondary windings
to be connected in parallel 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
200	330	100	13	50,4	44,4	44	28	4	2	9,6	0,4

General specification

Core Material:

Ferrite

Weight:

5.5 g

Packaging:

200 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 9.6 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 with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf

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GA3271-AL Flyback Transformer

for Maxim MAX5941B PWM Controller

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Warning