SMT Flyback Transformer
Document 348
Document 348 Revised 06/18/15
This flyback transformer was developed specifically for
ON Semiconductor’s isolated 2 W Bias Supply using the
NCP1030, and is specified in Application Note AND8119/D.
It is ideal for 48 V telecom and 42 V automotive applications.
It features interleaved primary and secondary windings to
minimize leakage inductance. It is designed for 35–76 V
input. Isolation (hipot) is 1500 Vrms, one minute between
the primary and secondary windings and 750 Vrms between
windings and the core.
To request free evaluation samples, contact Coilcraft or
visit www.coilcraft.com.
Inductance Inductance Leakage
at 0 Adc2 at Ipk3 DCR max Inductance4 Turns ratio Ipk3
Part number1 ±10% (µH) min (µH) (Ohms) max (µH) pri : sec (7-8) pri : sec (5-6) (mA)
B0226-EL_ 120 102 0.655 (pins 1
–
4) 0.95 1 : 0.36 1 : 0.36 400
0.820 (pins 2
–
3)
0.248 (pins 7
–
8)
0.248 (pins 5
–
6)
1. When ordering, specify a packaging code:
B0226-ELD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape (600 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.
2. Inductance is for the primary, measured at 275 kHz, 0.5 Vrms.
3. Peak primary current drawn at minimum input voltage.
4. Leakage inductance is for the primary winding with the secondary wind-
ings shorted.
5. Operating temperature range -40°C to +85°C.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
8
8
7
6
5
1
1
2
3
4
1
B0226-E
XXXX Y
Recommended
Land Pattern
0.400
10,16
0.475
12,07
0.235
5,97
0.358
9,09
0.067
1,70
0.079
2,00
0.063
1,60
0.079
2,00
max
Dot indicates pin 1
max
max
0.004/0,10
0.028
0,70 Partsmanufactured prior
to December 2011 may
be markeddifferently.
for ON Semiconductor
NCP1030
6
8
1
3
2
4
5
Primary
35
V–76V
Sec 1
12 V, 167 mA
Sec 2
12 V,3mA
7
Core material Ferrite
Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos
bronze.
Weight 0.96 g
Ambient temperature –40°C to +85°C
Maximum part temperature +125°C (ambient + temp rise)
Storage temperature Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 600 per 13″ reel Plastic tape: 24 mm wide,
0.37 mm thick, 16 mm pocket spacing, 6.1 mm pocket depth
PCB washing Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.
Dimensions are in inches
mm
