Flyback Transformers for Microchip Grid-Connected Solar Microinverter
- Developed for Microchip for their Grid-Connected Solar Microinverter using dsPIC
- For 220 Vac applications, KA4823-BL has been replaced by KA4823-CL, which has a higher SRF and higher efficiency.
- 3000 Vrms, one minute primary to secondary isolation
- Listed on Bill of Material for Reference Design AN1338
- Input voltage: 22 Vdc – 55 Vdc
- RoHS-compliant. Tin-silver (96.5/3.5) over tin cover copper-plated steel wire terminations
SPECIFICATIONS
Dimensions 
Schematic
3D models
| Part number Click to get parts |
Inductance at 0 A1 ±10% (µH) |
DCR max (Ohms)2 |
SRF typ (kHz) |
Leakage inductance3 max (µH) |
Turns ratio4 pri : sec |
Isat5 (A) |
Output | |
|---|---|---|---|---|---|---|---|---|
| pri | sec | |||||||
| JA4635-AL | 28 | 0.008 | 0.106 | 640 | 0.138 | 1 : 6 | 10.5 | 110 Vac |
| KA4823-CL | 28 | 0.008 | 0.472 | 360 | 0.115 | 1 : 12 | 10.5 | 220 Vac |
| 1 | Inductance is for the primary, measured at 150 kHz, 0.1 Vrms. | |
| 2 | DCR is with the secondary windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator. | |
| 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 parallel. | |
| 5 | Isat: DC current at which the inductance drops 10% (typical) from its value without current. | |
| 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 to MIL-STD-202 Method 215 plus an additional aqueous wash. More info. | ||
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