TPS54360使用时输出功率过大时,Vin 输入角电容发生振荡,发出蜂鸣声。输入电容式无极性贴片电容10uF,请问下是选择的电容容值太小还是材质不合适?按照datasheet里的计算,10uF应该是足够的了。
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Hi
首先你需要确认你的输入源是否有电流限制,导致TPS54360输入电流不够而导致瞬态电压被拉。
其次输入电容layout上需要尽量靠近芯片输入脚,10uF在略微偏小,建议再并联一个10~47uF.