Switching Power Supply Design and Optimization, Second Edition by Maniktala Sanjaya

Author:Maniktala, Sanjaya [Maniktala, Sanjaya]
Language: eng
Format: mobi
Tags: -
Publisher: McGraw-Hill Education
Published: 2014-03-12T16:00:00+00:00

TABLE 9.1 Specifications of Choke to Be Evaluated for Application

• For core-loss equations it is conventional to use half the peak-to-peak flux swing. So, as do most vendors, the B that Pulse Electronics uses in its datasheets actually refers to ΔB/2. This must be kept in mind in the calculations that follow.

• The astute designer can recognize the exponents of B and f in the core-loss equation in Table 9.1 as corresponding to a ferrite (which this is). Powdered Iron material 52 (from Micrometals Inc. at www.micrometals.com) would, for example, have given us an equation of the form ∝ B2.11 × f1.26).

• Most off-the-shelf inductors are designed for a temperature rise of 30 to 50°C.

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