Flyback Transformers ForMicrochipGrid-Connected
Solar Microinverter using dsPIC
• Listed on Bill of Material for Reference Design AN1338
• Input voltage: 22 Vdc – 55 Vdc
• 3000 Vrms, one minute isolation from primary to secondary
Core material Ferrite
Terminations RoHS tin-silver (96.5/3.5) over tin cover copper-plated
Weight 94.3 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
Tray 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 20 per tray
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Ind autc 0t aAn1c e DCR m ax (Ohms)2 SRF typ
inductance3 Turns ratio4 Isat5
pri : sec (A)
1 : 6
1 : 12
10.5 110 Vac
10.5 220 Vac
1. Inductance is measured at 150 kHz, 0.1 Vrms.
2. DCR is with the secondary windings connected in parallel.
3. Leakage inductance is for the three windings of the primary with the
secondary windings shorted.
4. Turns ratios are with the primary and secondary windings connected in
5. DC current at which the inductance drops 10% (typical) from its value
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Dimensions are in
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Document 901 Revised 10/11/11
© Coilcraft Inc. 2017
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.