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LMH6525: LMH6525电流叠加

Part Number: LMH6525

你好,我现在想提高输出电流,我想用多个通道叠加起来, ,我改变IR输入电阻,电流输出大小可以改变,如果IR通道电阻固定后,通过FPGA的IO口输出差分信号控制EN2+,EN2B-时候, ,这个时候电流没有叠加上来,把EN2+,EN2B-两个引脚断开,还是原来的电流值。请教如何操作,能使电流达到200mA以上,谢谢