High Q for small FM
30 July 2008
High inductance, high Q chip inductors miniaturise FM circuits for TV and mobiles.
Murata's LQW21H series of chip inductors maintains high Q of at least 35 in the FM band, whilst offering high inductance and small size. The inductors enable designers to miniaturise FM circuits without performance compromise.
They are designed for any FM band application where board space is critical, for example, TV tuners for mobile devices.
The LQW21H series provides 0.47 to2.2µH inductance and is available in compact 0805 packaging. The 0.47µH part, LQW21HNR47J00, has a rated current of 160mA at 10MHz with a maximum 1.30Ω DC resistance. The highest inductance part in the series is the LQW21HN2R2J00, with inductance 2.2µH at 10MHz, rated current of 75mA and a DC resistance of 6.5Ω maximum. Minimum Q is 35 at 100MHz for all parts in the series, with typical figures above 50 at the same frequency.
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