三星電機(jī) MLCC能承受的電流 Spec是多少？
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發(fā)布日期：2022-10-27
三星電機(jī)關(guān)于MLCC承受電流的 Spec沒有特定的值。當(dāng)MLCC加 DC 電壓時，幾乎沒有電流經(jīng)過 MLCC，因此沒有問題，當(dāng)加AC 電壓或脈沖電壓時，電流經(jīng)過電極會出現(xiàn)發(fā)熱。三星電機(jī)在 Spec Sheet 上有標(biāo)注相關(guān)內(nèi)容。使用時需要注意因加 AC 電壓或脈沖電壓導(dǎo)致的自身發(fā)熱溫度(Self-heating temperature)。
※ Self-heating Temperature
It is necessary to design the system, with considering self-heating generated by the ESR (Equivalent Series Resistance) of MLCC when AC voltage or pulse voltage is applied to MLCC.
2-6-1. When MLCC is used in an AC voltage or pulse voltage circuit, self-heating is generated when AC or pulse current flows through MLCC. Short-circuit may be occurred by the degradation of MLCC’s insulating properties.
2-6-2. The reliability of MLCC may be affected by MLCC being used in an AC voltage or pulse voltage circuit, even the AC voltage or the pulse voltage is within the range of rated voltage.
Therefore, make sure to check the following conditions.
1) The surface temperature of MLCC must stay within the maximum operating temperature after AC or Pulse voltage is applied.
2) The rise in increase by self-heating of MLCC must not exceed 20℃
