Flyback Transformer
for
National Semiconductor LM5070
| New RoHS part number is shown. Lead was removed from terminations. The second to the last character is now L to indicate RoHS compliance. (View old data sheet.) |
- Flyback transformer developed for NSC PoE LM5070 Controller
- Referenced in AN-1346 for LM5070 'HE' evaluation board
- 36 – 72 V input; 3.3 V, 4.5 A output (with secondary windings connected in parallel)
- Up to 1 MHz operating frequency
- Low profile, surface mount transformer
- RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations
Photo 
Pricing 
Materials declaration 
PDF data sheet
SPECIFICATIONS
Dimensions 
Schematic 
Tape and reel specifications
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| C1023-AL_ | 110.0 | 99.0 | 0.656 (1 -
3) 0.139 (4 - 6) 0.016 (12 - 7) 0.016 (11 - 8) 0.016 (10 - 9) |
1.40 | 1 : 0.19 | 1 : 0.69 | 70 | 1.5 | 1500 |
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| 1 | When ordering, please specify packaging code: e.g. C1023-ALD | |
| Packaging: | D = 13"
machine-ready reel EIA 481 embossed plastic tape (175 parts 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. |
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| 2 | Inductance is for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc | |
| 3 | Ipk is the peak primary current drawn at minimum input voltage. | |
| 4 | Leakage inductance is for the primary winding with all other pins shorted. | |
| 5 | Turns ratio is with the secondary windings connected in parallel. | |
| 6 | Capacitance measured between pins 3 and 4 with all other pins shorted. | |
| 7 |
Isolation is measured from the primary and auxiliary windings to the secondary. |
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| 8 | Ambient temperature range: | –40°C to +85°C |
| 9 | Storage temperature range: | Component: –40°C to +85°C Packaging: –40°C to +80°C |
| 10 | Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between. | |
| 11 | Electrical specifications at 25°C. | |
| Refer to Soldering Coilcraft Components before soldering. | ||