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现需要电磁线圈发射2.5KHz左右的正弦信号，正弦信号需要放大器放大后通入电磁线圈，求一款放大器芯片最好可以选通的，适用高感抗，输出功率较大的放大器芯片
没有太多信息，初步建议考虑OPA1622, http://www.ti.com/lit/ds/symlink/opa1622.pdf
我们希望线圈能够产生足够大的磁场，原来用的是LM3886，但由于发热量较大，希望找到可以替换的芯片，功率和输出功率大，发热量较小的芯片
