Lowest ever power loss from planar chokes

Edited by the Electronicstalk editorial team Apr 22, 2002

Pulse has introduced a series of inductors for DC/DC power supplies it reckons offer both the lowest direct current resistance ratings and the widest inductance range in the industry today.

Pulse has introduced a series of inductors for DC/DC power supplies it reckons offer both the lowest direct current resistance (DCR) ratings and the widest inductance range in the industry today.

Combining a compact design with high energy storage, the new components offer designers of DC/DC switch-mode power supplies a lower cost product which maintains high-efficiency performance.

This makes it ideal for use in the fields of telecommunications, industrial control systems, automotive and heavy equipment vehicle systems.

Power supply design is an important part of any electronic system; within portable designs it is the core system controlling battery life and overall weight, whilst within static assemblies heat contribution, package density and high-energy efficiency are desired.

Pulse's new inductors provide high thermal efficiency and high-current handling with a lead-free construction.

Their low profile, 7.36mm, meets engineers' size and high-density requirements whilst the compact surface-mount (SMT) package is compatible with all contemporary pick-and-place processes.

Available with inductances from 0.4 to 6.2uH and current ratings from 9 to 73A, the components provide DCR ranges from 0.38 to 1.44mohm.

This allows power loss ratings to be kept to a minimum, only 0.16 to 2.25W, placing the inductors among the most efficient on the market today.

"Power supply design is a gradual evolution", remarked Vincent Pelletier, product marketing manager at Pulse.

"Our new planar chokes offer DC designers the next step in efficiency, package density, and power loss, once again proving that Pulse is leading the market for miniaturised magnetic components".

The Pulse inductor series provide maximum energy storage of 2.4mJ with a frequency range of 100kHz to 2MHz, while an extended operating temperature range of -40 to +125C ensures product stability with minimum drift throughout the entire range.

Currently available in tape-and-reel packaging, the new components are available at prices starting from $1.45 per unit for two-turn, $1.65 per unit for three-turn and $1.85 for four-turn per unit in quantities of 10,000.