Transformer and inductor team up for telecomms

Edited by the Electronicstalk editorial team Mar 11, 2002

Pulse has introduced two new magnetic components for use with Linear Technology's discrete component solution for telecommunication power modules.

Pulse has introduced two new magnetic components for use with Linear Technology's discrete component solution for telecommunication power modules.

The planar design transformer and inductor require 40% less board space than discrete solutions yet offers one of the highest energy storage densities on the market today.

Applications for the two components are focused upon the need for the high-current, high-efficiency power supplies in telephony and networking devices.

Designed for use with Linear Technology's LT1681/LTC1698 chipset; the planar technology provides an optimum design to minimise AC losses and leakage inductances whilst not compromising the discrete physical height and size of the components which reach a maximum height of only 8.26mm.

An auxiliary winding on the primary side of the Pulse PA0191 transformer, which is designed to meet basic insulation requirements, provides the power for the LT1681 integrated circuit.

Linear's chipset uses a dual switch forward topology to provide an isolated 3.3V/20A output from a 48V input, ideal for telecommunications power modules.

"The Pulse planar solution enables the Linear Tech chipset to meet the power densities required for this discrete brick solution chipset", remarked Kurk Mathews, applications engineer for Linear Technology.

The Pulse P1977 inductor is manufactured with low resistance plates for a low DC resistance and the highest energy storage density of any inductor on the market.

Operating over a broad temperature range from -40 to +135C, and with excellent electromagnetic compatibility the inductor easily achieves EMC compliance.