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1622输出电流如何适配不同阻抗

Other Parts Discussed in Thread: OPA1622

我看了1622的官方参考设计文档,里边是按照32欧,100mw来设计的,最后的电流是79ma,电压vpp是2.529。 问题是如果我换成一个8欧负载,假设其功率也是100mw。 那么这时音量如果调到2.529的档位,电流是2.576/16=158ma,这已经超出1622正常工作范围了吧,这时会出现什么情况,削顶吗? 所以设计中应该如何操作以适应不同阻抗的负载?  如果是负载变大,那么2.529的输出电压除了动态范围小,还有什么缺点?