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BS EN 62490-2:2010

BS EN 62490-2:2010

$102.76

ESL measuring method – Surface mount capacitors for use in electronic equipment

Published By Publication Date Number of Pages
BSI 2010 20
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This part of IEC 62490 provides the ESL measuring method for the surface mount capacitors for use in electronic equipment.

The ESL measurement method can be applicable to the surface mount capacitors with the following properties, but not limited to these:

  1. capacitance range: 10 μF to 1 000 μF;

  2. size: L × W = 3,2 mm × 1,6 mm to 7,3 mm × 4,3 mm, H = 4,0 mm;

  3. ESL range: 5 nH or less.

NOTE The surface mount capacitors in this document are limited to capacitors with lead frame or with thin coated terminals, see Figure 1. The scope of this document does not include capacitors with face down terminals, see Figure 2.

PDF Catalog

PDF Pages PDF Title
6 English
CONTENTS
7 FOREWORD
9 1 Scope
2 Normative references
Figure 1 – Lead frame and thin coating types of surface mount capacitors and the specification of the dimensions (L, W, and H)
Figure 2 – Surface mount capacitors with face down terminal
10 3 Terms and definitions
4 Test fixture and compensation chip
4.1 Test fixture
Figure 3 – Test fixture and terminals of test fixture
11 Figure 4 – Connection diagram
12 Figure 5 – Sectional view of the test fixture with an inserted surface mount capacitor pressured to the terminals of the test fixture
Figure 6 – Example of surface mount capacitor mounted on terminals of test fixture
13 4.2 The open, short, and load compensation chip
Figure 7 – Front view of mounting position of objects on test fixture
14 5 Measuring method
5.1 Measuring equipment
5.2 Measurement conditions
5.3 Measurement points
5.4 Frequency and signal level
Figure 8 – Measurement points
15 5.5 Measurement procedure
Figure 9 – Open compensation-chip position
16 Figure 10 – Load compensation-chip position
Figure 11 – Short compensation-chip position
17 6 Items to be indicated in the test result report
18 Annex A (informative) Theoretical ESL value of the short compensation chip
Table A.1 – The calculation results of inductance of the short compensation chip

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BS EN 62490-2:2010
$102.76