Magnetics for 300 W
PFC Power Supply

• Specified by Texas Instruments in Reference Design SLUU341.
• Flyback transformer for 5 W bias supply, HA3950-AL, listed as T201;
  Gate Drive Transformer, HA3858-AL, listed as T301
• Isolation: 3000 Vrms primary to secondary; 500 Vrms windings to core
• RoHS-compliant. Tin-silver over tin over copper terminations

Photo    Pricing    Materials declaration HA3950-AL  HA3858-AL

PDF data sheet

SPECIFICATIONS

Schematics    Dimensions    3D models HA3950-AL  HA3858-AL

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Flyback Transformer

HA3950-AL	2.3	1.61	0.860 (pri) 0.109 (sec) 0.080 (P1)	16.5	1 : 0.16 : 0.11	0.3	15 V, 0.33 A

1	Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/HP 4263B impedance analyzer or equivalent
2	Ipk: Peak primary current drawn at minimum input voltage.
3	DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4	Leakage inductance is for the primary with the secondary winding shorted.
5	Output of the P1 winding is 10 V, 20 mA.
6	Ambient temperature range:	–40°C to +85°C
7	Storage temperature range:	Component: –40°C to +85°C Packaging trays: –40°C to +80°C
8	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested with pure water or alcohol only. Other solvents.

Gate Drive Transformer
HA3858-AL	1 : 1 : 1	460	1.87 (pri [A]) 2.06 (pri [B])	0.38 (pri [A]) 0.472 (pri [B]) 0.424 (sec)	150	1.15	8.48 (pri) 28.66 (sec)

1	Inductance is for each primary, measured at 200 kHz, 0.4 Vrms, 0 Adc using an Agilent/HP 4263B impedance analyzer or equivalent
2	Leakage inductance is for each primary with the secondary winding shorted.
3	DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4	SRF is measured with the coils connected in series using an Agilent/HP 4192 or equivalent.
5	Capacitance of the primary is measured from pin 1 to pin 3. Capacitance of the secondary is measured with the primaries shorted.
6	Ambient temperature range:	–40°C to +85°C
7	Storage temperature range:	Component: –40°C to +85°C Packaging trays: –40°C to +80°C
8	Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested with pure water or alcohol only. Other solvents.