Datasheet 3D Model

WA8759 Flyback Transformer

for Texas Instruments TIDA-01505

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
Input Voltage	Sec	Aux1	Aux2	Power	Fsw
40 V — 1000 V	15 V , 4 A	20 V , 0.035 A	5 V , 0.035 A	60 W	250 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (mH) 2 (Tolerance: ±10%)	Inductance min at 1.9 A (mH)	DCR max				Leakage Inductance max (µH) 3	Turns Ratio 4	Isolation Voltage (Vrms) 5
Part number (Hover for schematics)	Inductance at 0A (mH) 2 (Tolerance: ±10%)	Inductance min at 1.9 A (mH)	Pri (Ω)	Sec (mΩ)	Aux1 (mΩ)	Aux2 (mΩ)	Leakage Inductance max (µH) 3	Pri : Sec : Aux1 : Aux2	Isolation Voltage (Vrms) 5
WA8759-AL	1.50	1.35	3.10	70.00	1300.00	340.00	34.0	1 : 0.083 : 0.109 : 0.026	5700

Notes

Output is for the secondary. Output of Aux1 is 20 V, 35 mA; Output of Aux2 is 5 V, 35 mA.
Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Adc.
Leakage inductance is for the primary winding with the secondary windings shorted.
Turn Ratios specified are with no core gap.
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):

See FIT/MTBF Calculations

Schematics

Physical characteristics

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.

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