+ 好音质立体声功率放大器
时间:10-02
整理:3721RD
点击:
这一款用到是2.8W 的立体功率放大器,因为是用的锂电池供电,电源电压只有3.3~4.2V ,所以这款是比较适合了,下面 是做原理图:
外围元件也是比较少的,又没有输出电容,来看一下他的参数:
- Fully Differential Architecture and High PSRR (-80 dB) Provide Excellent RF Rectification Immunity
- 2.8 W Into 3 From a 5-V Supply at THD = 10% (Typical)
- Very Low Crosstalk:
- -100 dB Typical at 5 V, 3
- 2.5-V to 5.5-V Operating Range
- Low Supply Current:
- 8 mA Typical at 5 V
- Shutdown Current: 80-nA Typical
- Fast Startup (27 ms) With Minimal Pop
- Internal Feedback Resistors Reduce Component Count
- Thermally Enhanced QFN Packaging
关机电流超小,刚好接上我这边的差分输出,来看看LAYOUT:
由于在量产的产品,不能说太多东西,QFN 封装:
做成产品所有性能指标都合格,SNR ,THD,PO 等。
不错!有没有测THD+N?
楼主慢慢分享 吧
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