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NA5743-AL Flyback Transformer

for Linear Technology LT8584

RoHS compliant AEC-Q flag
  • Developed for Linear Technology LT8584 Isolated Monolithic Active Cell Balancer
  • Input: 2 – 8 V; Outputs: 10 – 35 V, 30 – 80 V and 100 – 400 V
  • AEC-Q200 Grade 1 (−40°C to +125°C)
Buy Now:
Count Unit price
1 $3.10
200 $2.94
600 $1.77
1200 $1.51
2400 $1.30

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

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

Typical Application

Works with ADIPowerbyLinear LT8584

Input Voltage Output Power Fsw
2 V 8 V 80 V 12 W 150 kHz


Electrical specifications at 25°C.

Part number 1 Inductance
at 0A (µH)
(Tolerance: ±10%)
min at   7 A (µH) 2
DCR max (Ω) 3 Leakage
max (µH) 4
Turns Ratio 5 Isolation
Voltage (Vrms) 6
Pri Sec Pri : Sec
NA5743-AL_ 4.0 3.6 0.012 0.500 0.116 1 : 4 1500
  1. When ordering, please specify packaging code: e.g. NA6252-ALD
  2. Peak primary current drawn at minimum input voltage.
  3. DCR for the primary is with the windings connected in parallel, measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  4. Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Ad.
  5. Turns ratios are with the primary windings connected in parallel.
  6. 1500 Vrms, one minute isolation from primary to secondary windings.


  • RoHS-compliant. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations. Other terminations available at additional cost.


  • 13" reel, machine-ready
    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.
RoHS compliant
Ambient temperature range:
–40°C to +125°C
Storage temperature range:
e 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



Primary 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 part_or_c-(1).gif
200 330 100 13 38,4 32,4 32 24 4 2 11,2 0,5

General specification

Core Material:
3.9 – 4.2 g
200 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 24 mm pocket spacing, 11.2 mm pocket depth


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.