Friday, August 18, 2006
Power inductors cut down on resistance
Flat-coil power inductors have low DC resistance and high saturation current in a low-profile self-leaded surface-mount package.
Pulse has introduced a new series of flat-coil power inductors with low direct current resistance (DCR) and high saturation current in a low-profile self-leaded surface-mount package. The PG0426NL series has the lowest DCR of any inductors of this size and profile and uses an advanced core material that resists thermal aging up to 150C. These inductors are ideal for use in voltage regulator module (VRM) applications in notebook computers, desktop computers, workstations and servers as well as DC/DC applications, point-of-load (POL) convertors and other high-density high-power high-ambient-temperature applications.
Pulse's PG0426NL series has a high peak saturation current of 60A and a maximum operating current rating of 34.5A that enables the inductors to handle the high current requirements of microprocessors with significant saturation margin.
The DCR of 11.8 to 1.5mohm results in lower copper losses and maximises the current rating for higher component performance and system efficiency.
Inductance values for this series range from 1.5 to 0.1uH.
A key advantage of Pulse's PG0426NL inductor series is the use of an advanced core material that can operate at high temperatures without any core deterioration or an increase in core loss.
The core performance was verified by subjecting the core material to system-level testing at a core temperature of 150C.
Results showed that the core material did not exhibit any effects of thermal aging at this high core temperature.
The Pulse PG0426NL series performs without degradation in applications with elevated ambient and inductor temperatures.
Pulse's flat-coil inductor windings are made of rectangular copper (flat wire) wound helically, similar to a spring.
The rectangular copper wire has a larger surface area than round wire, resulting in reduced skin effect losses.
The rectangular wire provides more copper in the same area that round wire would occupy, reducing the direct current resistance in a lower profile volume.
The rectangular wire winding also provides a self-terminating lead (no internal solder joints) to increase reliability and reduce cost.
The inductors come in an industry-standard 2525 footprint of 7.5 x 7.0mm maximum (6.9 x 6.5mm nominal) with a low profile of 3.2mm maximum height.
Low height is important to allow even airflow over the entire circuit board to reduce hot spots.
Pulse has introduced a new series of flat-coil power inductors with low direct current resistance (DCR) and high saturation current in a low-profile self-leaded surface-mount package. The PG0426NL series has the lowest DCR of any inductors of this size and profile and uses an advanced core material that resists thermal aging up to 150C. These inductors are ideal for use in voltage regulator module (VRM) applications in notebook computers, desktop computers, workstations and servers as well as DC/DC applications, point-of-load (POL) convertors and other high-density high-power high-ambient-temperature applications.
Pulse's PG0426NL series has a high peak saturation current of 60A and a maximum operating current rating of 34.5A that enables the inductors to handle the high current requirements of microprocessors with significant saturation margin.
The DCR of 11.8 to 1.5mohm results in lower copper losses and maximises the current rating for higher component performance and system efficiency.
Inductance values for this series range from 1.5 to 0.1uH.
A key advantage of Pulse's PG0426NL inductor series is the use of an advanced core material that can operate at high temperatures without any core deterioration or an increase in core loss.
The core performance was verified by subjecting the core material to system-level testing at a core temperature of 150C.
Results showed that the core material did not exhibit any effects of thermal aging at this high core temperature.
The Pulse PG0426NL series performs without degradation in applications with elevated ambient and inductor temperatures.
Pulse's flat-coil inductor windings are made of rectangular copper (flat wire) wound helically, similar to a spring.
The rectangular copper wire has a larger surface area than round wire, resulting in reduced skin effect losses.
The rectangular wire provides more copper in the same area that round wire would occupy, reducing the direct current resistance in a lower profile volume.
The rectangular wire winding also provides a self-terminating lead (no internal solder joints) to increase reliability and reduce cost.
The inductors come in an industry-standard 2525 footprint of 7.5 x 7.0mm maximum (6.9 x 6.5mm nominal) with a low profile of 3.2mm maximum height.
Low height is important to allow even airflow over the entire circuit board to reduce hot spots.
# posted by Swathi @ 10:11 PM 
