Planar SMT transformers handle 160 or 300 W

The PL160 and PL300 series of surface-mount planar transformers target power over Ethernet (PoE) and -48-V network power applications with ratings of 160 and 300 W. The devices are rated for between 200 and 700 kHz with a nominal 48-V input.

The transformers offer excellent DCR, very low leakage inductance and have 1500 Vrms one minute primary to secondary isolation. An example PL160-102L transformer with a dual five-turn primary, primary inductance of 240 µH, and low 0.45-µH leakage inductance comes in a 0.82 x 0.80 x 0.36-in. package. The primaries have 18.2- and 21.5-mΩ DCR and the three-tap secondary is 6.8 mΩ.