B82477G4684M EPCOS Inc, B82477G4684M Datasheet

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B82477G4684M

Manufacturer Part Number
B82477G4684M
Description
Inductor,Ferrite,680uH,20+% Tol,20-% Tol,5050-Case
Manufacturer
EPCOS Inc
Datasheet

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Part Number:
B82477G4684M000
Manufacturer:
EPCOS
Quantity:
60 000
1
Especially in this age of fully-electronic and highly-integrated equipment, inductive components are
indispensable. They are used to store energy intermittently in switch-mode power supplies and
DC/DC converters, as parts of high-frequency circuits, as filter elements and last but not least as
interference suppression components to ensure EMC.
Of course, the demands placed on inductors depend on how and where they are to be used. In HF
circuits, coils with high quality factors and resonance frequencies are needed. In EMC applications,
high inductances are required in order to achieve good interference suppression characteristics, low
Q factors being more desirable here due to the need to avoid resonances.
EPCOS provides suitable inductive components for all applications. This data book contains a wide
selection of standard components, from SMT types (starting with SIMID 0402) right up to the 4-line
high-current inductors for power electronics applications.
Attention is drawn to the excellent HF characteristics and the extremely high reliability of the com-
ponents, achieved thanks to large-scale production automation and many years of experience in
the manufacture of this kind of components.
An overview of typical applications for inductors and chokes
Application
HF circuits,
resonant circuits
EMC
Filter circuits
Switch-mode
power supplies,
DC/DC converters
1.1
SMT styles (SIMID product range) and leaded RF chokes are especially suitable for RF and other
high-frequency circuits. Typical applications are resonant circuits and frequency-selective filters of
the type being increasingly used in telecommunications engineering and automotive electronics. In
some cases, special demands on the inductive components arise, for example, when used in trans-
mitter output circuits of mobile telephones (high Q factors and resonance frequencies) and in air-
bag control circuits (high pulse currents).
1.2
When inductive components are used for filters in power supplies for electronics, high inductances, the
lowest possible DC resistance and a low Q factor are required. The impedance should have a wide-
band frequency characteristic. In addition to the current rating, the maximum permissible pulse current
(switching transient currents) and adequately high core material saturation are of importance.
Chokes belonging to all type series presented here can be used for this range of applications, from
the SIMID types right up to chokes with powder cores and one or two lines.
General Technical Information
depends on the specific application
Inductive components for electronic equipment
HF circuits
Filter circuits
Inductance
low
high
high
Current rating Resonance
low
high
9
04/00
frequency
very high
high
high
medium
Q factor
very high
low
low
high
DC resistance
low
very low
very low
low

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