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MA5237 Flyback Transformer

for Maxim MAX5941B PWM Controller

RoHS compliant
  • Improved version of the MA5237-AL with lower leakage inductance and better winding parasitics
  • Flyback transformer developed for Maxim for the MAX17498B Evaluation Kit
Buy Now:
Count Unit price
1 $5.00
200 $4.83
600 $2.63
1200 $2.29
2400 $1.96
4800 $1.79

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

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Maxim MAX17498B

Input Voltage Output 1 Power Fsw
18 V 36 V 5 V , 1.5 A 7.5 W 500 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 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
Pri Sec Aux Pri : Sec : Aux
MA5237-EL_ 60.0 54.0 0.110 0.035 0.170 0.565 1 : 0.5 : 0.25 3500
Notes
  1. Output of the secondary is with the windings connected in parallel. Aux winding output is 2.5 V, 20 mA.
  2. When ordering, please specify packaging code: e.g. MA5237-ELD
  3. Inductance is for the primary, measured at 500 kHz, 0.1 Vrms.
  4. Peak primary current drawn at minimum input voltage.
  5. 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.
  6. Leakage inductance is for the primary winding with the secondary windings shorted.
  7. Turns ratios are with the secondary windings connected in parallel. 
  8. 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 parts per full reel).
  • 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.
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):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

ma5237_schem.gif
Secondary windings to be connected
in parallel on the PC board.

Physical characteristics

ma5237d.gif

dims_inches_mm-(3).gif

Tape and Reel specification

tapereel_pl.gif


 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_c.gif
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.