3D Model Datasheet

MA5237-EL Flyback Transformer

for Maxim MAX5941B PWM Controller

Improved version of the MA5237-AL with lower leakage inductance and better winding parasitics
Flyback transformer developed for Maxim for the MAX17498B Evaluation Kit

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Count	Unit price
1	$5.30
200	$5.49
600	$2.99
1200	$2.61
2400	$2.23
4800	$2.04

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

Packaging

D = 13" machine-ready reel

. in stock, ready to ship today.

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Typical Application

Works with Maxim MAX17498B

Input Voltage	Output 1		Power	Fsw
Input Voltage	Sec	Aux	Power	Fsw
18 V — 36 V	5 V , 1.5 A	2.5 V , 0.02 A	7.5 W	500 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1.5 A (µH) 4	DCR max (Ω) 5			Leakage Inductance max (µH) 6	Turns Ratio 7	Isolation Voltage (Vrms) 8
Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1.5 A (µH) 4	Pri	Sec	Aux	Leakage Inductance max (µH) 6	Pri : Sec : Aux	Isolation Voltage (Vrms) 8
MA5237-EL_	60.0	54.0	0.110	0.035	0.170	0.565	1 : 0.5 : 0.25	3500

Notes

Output of the secondary is with the windings connected in parallel. Aux winding output is 2.5 V, 20 mA.
When ordering, please specify packaging code: e.g. MA5237-ELD
Inductance is for the primary, measured at 500 kHz, 0.1 Vrms.
Peak primary current drawn at minimum input voltage.
DCR for the secondary is measured with the windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
Leakage inductance is for the primary winding with the secondary windings shorted.
Turns ratios are with the secondary windings connected in parallel.
3500 Vrms, one minute isolation primary to secondary windings.

Termination:

RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) 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 (200 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 +85°C

Storage temperature range:

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

Maximum part temperature:

+125°C (ambient + temp rise)

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

See FIT/MTBF Calculations

Schematics

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	24	4	2	11.5	0,4

General specification

Core Material:

Ferrite

Weight:

7.1 g

Packaging:

200 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 24 mm pocket spacing, 11.5 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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MA5237-EL 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

Warning