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データシートサーチシステム |
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データシートサーチシステム |
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BTN8962 データシート(PDF) 36 Page - Infineon Technologies AG |
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BTN8962 データシート(HTML) 36 Page - Infineon Technologies AG |
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36 / 94 page  The corresponding break-even points for the BTN8960/62 and BTN8980/82 can be calculated for the load current IL accordingly: IL = dkILIS ⋅ IIS − IIS offset = dkILIS ⋅ IIS lim − IIS offset Equation 16 IL = 7, 2 ⋅ 103 ⋅ 4 mA − 440 µA ≈ 25, 6 A Equation 17 IL = 14 ⋅ 103 ⋅ 4 mA − 385 µA ≈ 50, 6 A Equation 18 For such a system, it wouldn’t be possible to distinguish easily between the fault condition current IIS(lim) and a current sense signal, for IL > 25 A if the BTN8960/62 is used, and IL > 50 A for the BTN8980/82. For a more precise consideration, also the temperature dependency of IIS(lim), dkILIS and IIS(offset) has to be considered. For the given critical area for load currents IL > 25 A, especially the parameters dkILIS and IIS(lim) have the greatest influence. The temperature dependency of dkILIS is described in Chapter 4.1.3, and of IIS(lim) in Chapter 4.5.2.1: • For a rising temperature, the fault condition current IIS(lim) increases, and vice versa. • For a rising temperature the dkILIS decreases and vice versa. This relationship is also illustrated by Figure 29. IIS load current - IL IIS(lim) IIS(lim) 30A rising temperature ΔI IS ΔI IS IIS(lim) dkILIS cold hot Figure 29 Illustration of the temperature dependencies of the fault distance and relevant parameters Additionally the difference between the fault condition current IIS(lim) and the sensed current IIS(IL) can be calculated as follows: BTN8960 /62 /80 /82 High Current PN Half Bridge Current Sense Improvement Application Note 36 Rev. 0.6 2017-02-21 |
同様の部品番号 - BTN8962 |
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同様の説明 - BTN8962 |
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