Power Inductors Combine Efficiency With Low Core Loss
News Release from:
07 December 2005
Focus EDL announces a new series of power inductors designed for PC motherboard and server markets. Produced by Pulse, the PG0322NL series is ideal for use in voltage regulator modules, DC/DC converters, and point of load applications.
These new inductors have a high heating current rating of 32 to 60A and a high current saturation capability from 30 to 50A, making them ideal for high current, multiphase
buck converter applications.
The PG0322NL series is designed with a ferrite core material rather than the iron powder material typically used in existing motherboard inductor solutions. Inductors with an iron powder core have a high power loss in the core material. The ferrite core material has
60% less core loss, resulting in low power use and less heat generation. The ferrite
core also eliminates the risk of thermal aging core failures.
They have an operating temperature range of -40 to +130ºC, providing power supply design engineers enough margin for thermal de-rating - especially for high ambient temperature applications. The PG0322NL series offers a wide open circuit inductance (OCL), ranging from 0.28 to 1.20µH which gives the engineers a free hand in choosing the inductance value for the smallest ripple current and fastest system transient response. The low direct current resistance (DCR), ranging from 0.60 to 1.65mO, yields higher system efficiency due to lower copper losses.
Both the OCL and DCR have tight tolerances of ±8% respectively, allowing for more accurate current sensing in systems using the inductor as the current sense element.
The low-cost PG0322NL power cube inductor series package height of 9.5mm is
optimised to fit underneath the processor heat sink whilst the compact 14.5 x 14.5mm footprint maximises board space. These inductors are RoHS compliant and meet
the EIA481 standard.