SMT Planar Transformer for
Texas Instruments UCC2897
- Developed for TI UCC2897 Current Mode Active Clamp PWM Controller (PMP9720 reference design)
- Designed for forward topology operating at 200 kHz with an input range of 48 – 60 V.
- 1500 Vrms, one minute isolation hipot) from primary to secondary
- RoHS-compliant 260°C compatible. Matte tin over nickel over brass terminations
SPECIFICATIONS
| Part number Click to get parts |
Turns | Inductance1 ±20% (µH) |
Leakage inductance2 max (µH) |
DCR max (mOhms)3 | Volt-time product (typ)4 (Vµsec) |
Output5 | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| N1 | N2 | Sec | Aux | pri | sec | aux | |||||
| RA7040-AL | 6 | 6 | 3 | 3 | 50 | 0.55 | 10.75 | 4.25 | 61.1 | 100 | 12 V, 13 A |
| 1 | Inductance is for the primary, measured on Agilent/HP 4284A at 200 kHz, 0.5 Vrms, 0 Adc with primary windings connected in parallel. | |
| 2 | Leakage Inductance is for the primary, measured at 200 kHz, 0.5 Vrms, 0 Adc with primary windings connected in parallel and all secondary pins shorted. | |
| 3 | DCR for the primary is measured with the windings connected in parallel. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator. | |
| 4 | Volt-time product is based on primary windings connected in parallel. | |
| 5 | Output is of the secondary winding frmo pins 11 – 8. Output of the aux winding is 12 V. | |
| 6 | Ambient temperature range: | −40°C to +125°C |
| 7 | Storage temperature range: | Component: −40°C to +165°C Tape and reel packaging: −40°C to +80°C |
| 8 | Maximum part temperature: 165°C (ambient + temp rise) | |
| 9 | 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. | |
| 10 | Electrical specifications at 25°C. | |
| Refer to Soldering Coilcraft Components before soldering. | ||