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WA8759 Flyback Transformer

for Texas Instruments TIDA-01505

RoHS compliant AEC-Q flag
  • Designed for Texas Instruments Automotive 40 V to 1 kV Input Flyback Reference Design Supporting Regenerative Braking Safety Test
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • 5700 Vrms, one minute isolation (hipot) from primary and auxilliary to secondary winding; 2000 Vrms pri to aux
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Typical Application

Works with Texas Instruments TIDA-01505

Input Voltage Output 1 Power Fsw
Sec Aux1 Aux2
40 V 1000 V 15 V , 4 A 20 V , 0.04 A 5 V , 0.04 A 60 W 250 kHz

Specifications

Electrical specifications at 25°C.

Part number Inductance
at 0A (mH) 2
(Tolerance: ±10%)
Inductance
min at   1.9 A (mH)
DCR max (Ω) Leakage
Inductance
max (µH) 3
Turns Ratio 4 Isolation
Voltage (Vrms) 5
Pri Sec Aux1 Aux2 Pri : Sec : Aux1 : Aux2
WA8759-AL 1.50 1.35 3.10 0.07 1.30 0.34 34.0 1 : 0.083 : 0.109 : 0.026 5700
Notes
  1. Output is for the secondary. Output of Aux1 is 20 V, 35 mA; Output of Aux2 is 5 V, 35 mA.
  2. Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Adc.
  3. Leakage inductance is for the primary winding with the secondary windings shorted.
  4. Turn Ratios specified are with no core gap.
  5. 5700 Vrms, one minute isolation (hipot) from primary and auxilliary to secondary winding.
    2000 Vrms pri to aux.

Termination:

  • RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel over
    phos bronze.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +125°C
Storage temperature range:
Component: –40°C to +165°C
Tray packaging: –40°C to +80°C
Maximum part temperature:
+165°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

wa8759s.gif

Physical characteristics

wa8759d.gif

dims_inches_mm.gif

General specification

Core Material:
Ferrite
Weight:
35.5 g
Packaging:
16 parts per tray

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.