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TPS54231,影响最大输出电流的关键点

Other Parts Discussed in Thread: TPS54231

24V转5V的电路,使用TPS54231,驱动点阵显示,行扫描。发现一个问题,如果此行需要显示的点数多时,相对于显示点数少的行,亮度会有所下降。考虑可能与电源最大输出电流有关。因此想咨询,哪些关键点涉及TPS54231最大输出电流?