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MC34063A: NE5534x Low-Noise Operational Amplifiers DC-DC Power Solutions

? ?
Prodigy 10 points
Part Number: MC34063A
Other Parts Discussed in Thread: TPS61093

Hell0！ TI Team


We are again looking for a power management solution that supports ±15V supply, this supply is applied to NE5534x Low-Noise Operational Amplifiers, We have looked at the MC34063A and it doesn't seem to be a very good fit. please help to recommend a suitable application solution and reference application design, thanks!

  • 0
    TI__Guru**** 308311 points

    Hi

         你的输入电压是多少？  正负电压输出最大电流多少？

  • 0 回复 Johnsin Tao
    Prodigy 10 points

    您好！

    输入电压是3.3V~4.4V；输出电压是+15V和-15V，因为是给音频运放供电，输出电流不需要很大，50mA内都足够用了。请帮忙推荐一个合适的电源芯片解决方案，注意我的应用是用于音频运放供电，对电源要求非常高，否则很容易出现音频噪音。

  • 0 回复 ? ?
    TI__Guru**** 308311 points

    HI

       可以选择TPS61093等芯片，可以参考datasheet 第１６页的电路，或者也可以选择TPS61080/1之类的芯片（datasheet上有推荐电路）

    　如你所说，音频运放对纹波noise都很敏感，一般需要在DC/DC后增加ＬＣ（磁珠加电容）甚至高PSRR低Noise的LDO.