Introduction of the DC-DC Converter Inductor Selection Tool - Murata
Introduction of the DC-DC Converter Inductor Selection Tool - Murata
Introduction of the DC-DC Converter Inductor Selection Tool - Murata
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■Frequency –Loss CharacteristicsWhen <strong>the</strong> switching frequency is changed, <strong>the</strong>current waveform will change greatly. Thecharacteristics in consideration <strong>of</strong> this changeare displayed in this graph.This can be used as a reference when <strong>the</strong> ICoperating frequency has not beenestablished.Changes <strong>of</strong> loss when <strong>the</strong> switching <strong>of</strong>a <strong>DC</strong>‐<strong>DC</strong> converter is changedCurrent [A]Change <strong>of</strong> Waveformby スイッチング Changing <strong>of</strong> 周 Switching 波 数 の 変 Frequency 化 による 波 形 の 変 化09 0.90.80.70.60.50.40.30.201 0.100 0.2 0.4 0.6 0.8 1 1.2Time[us]■Input Voltage –Loss CharacteristicsThis graph shows <strong>the</strong> change <strong>of</strong> loss when<strong>the</strong> input voltage <strong>of</strong> a <strong>DC</strong>‐<strong>DC</strong> converter ischanged.The following cases are assumed for <strong>the</strong>evaluation.When designing i portable tbl devices:Evaluation <strong>of</strong> loss when <strong>the</strong> voltagedeteriorates by consumption <strong>of</strong> a batteryChanges <strong>of</strong> loss when <strong>the</strong> input voltage <strong>of</strong>a <strong>DC</strong>‐<strong>DC</strong> converter is changed(For IC designers)When setting <strong>the</strong> reference component <strong>of</strong>a <strong>DC</strong>‐<strong>DC</strong> converter IC:Evaluation <strong>of</strong> an inductor ideal for <strong>the</strong>overall input voltage within <strong>the</strong>specification range
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