Power inductors set a new performance benchmark

Murata has released the DFE21CCN_EL series of power inductors. Targeted for use in DC-DC converters and power management circuitry, these components represent significant enhancements in operating performance parameters compared to its earlier generation of inductors. They display a 20% increase in ISAT and a 50% reduction in RDC over their predecessors. These parameters assist in raising operational efficiency levels and allowing downsizing of system designs.

The new inductors use the company's long-established expertise in materials science – with specially devised metal materials, low-resistance terminals and an optimised moulding technique. The innovative L-shaped electrodes claim to allow these components to achieve considerably higher density levels than other manufacturers.

The DFE21CCNR24MEL offers a 0.24µH inductance value, with an RDC of 20mOhm (Max) and an ISAT of 6.5A (Max). For the DFE21CCNR47MEL, the key values are 0.47µH for inductance, 29mOhm (Max) for RDC and 4.8A (Max) for ISAT. The 1µH-rated DFE21CCN1R0MEL and 2.2µH-rated DFE21CCN2R2MEL have respective typical RDC figures of 60mOhm and 138mOhm, with ISAT figures of 3.3A and 2.1A. Its DFE21CCN_EL series components are provided in 0805" size format.

"Under normal circumstances, if you look to improve the ISAT value of a power inductor then its RDC will suffer accordingly. Vice-versa, an inferior ISAT will impact on the RDC for the power inductor," explains Tomohiro Yao, EMI Division, general manager of Marketing and Promotion Department, at Murata. "Thanks to the technological advances we have been able to implement, from both process and structural perspectives, we have succeeded in improving ISAT and RDC simultaneously, with no necessary trade-offs."