Coilcraft Intros PL140 SMT Planar Transformers

Coilcraft Inc. (Cary, IL) introduced its new PL140 surface-mount (SMT) planar transformers that are rated for 140 W and are designed to operate between 200 kHz and 500 kHz. They are available in 15 turns ratios and six different schematics. The transformers are suitable for use in high-current power supply applications such as open-loop intermediate bus converters and closed-loop voltage-mode converters.

They are designed for use with nominal −48 V input. Output voltages depend on the the turns ratio, duty cycle, and circuit topology. They offer high efficiency and feature DCR, low leakage inductance, and 1,500 Vdc primary-to-secondary isolation. Coilcraft can also design custom planar transformers with different turns ratios, and with an auxiliary winding to meet specific requirements.

Coilcraft's Designer’s Kit C390 contains two samples, each of the parts.