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TL1451 误差放大器问题

Other Parts Discussed in Thread: TL1451

选择 IC TL1451时, 数据手册说明其误差放大器的输入电压为0-20V, 误差放大器数据表中,最小输入电压为1-1.4V。现在测试时,TL1451ACPWR 输入电压到1.9V ,内部误差放大器就不能正常工作(输出不受控),但是另外一个型号,TL1451ACN 输入4V,也能正常工作。