Power transformer improves DC/DC power conversion efficiency

By Gina Roos, editor-in-chief

Bourns, Inc. has expanded its flyback power transformer line with the launch of the Bourns Model SM13117EL device. Designed to support IEEE 802.3 af-compliant, integrated Power-over-Ethernet (PoE) powered device (PD), and pulse width modulation (PWM) controller applications, the new flyback power transformer provides DC/DC power conversion in isolated mode.

The low-profile, small-form-factor PoE flyback transformer features low leakage inductance and excellent EMI performance. Key specifications include 13 watts of output power, 36 to 72 VDC/250-kHz input, 12 VDC/1.08-amp output, and 1.5k Vrms withstanding voltage. It offers an extended -40°C to 125°C operating temperature range.

Ensuring safe operation, the electrical insulation of the transformer complies with the UL 1446 Class B (130 °C) insulation system. The transformer bobbin carries the UL 94 V-0 flammability rating. The transformer also is RoHS compliant.

Key applications include a range of PoE-powered devices such as VoIP phones, WLAN access points, and network cameras as well as with integrated PoE PD interface and PWM controllers offered by several leading IC manufacturers. The Model SM13117EL flyback power transformer is available now. Click here for the datasheet.