各位技术大神好
目前我正在调试TPA3110D2PWPR音频放大器,发现数据手册21页典型应用电路图“Figure 42. Typical Application Schematic With BTL Output and Single-Ended Inputs With Power Limiting”中,输出端有4个0.22uF的电容,想问下作用是什么?还有播放音乐时有呲呲的杂音,有哪些需要调整的?图如下:
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各位技术大神好
目前我正在调试TPA3110D2PWPR音频放大器,发现数据手册21页典型应用电路图“Figure 42. Typical Application Schematic With BTL Output and Single-Ended Inputs With Power Limiting”中,输出端有4个0.22uF的电容,想问下作用是什么?还有播放音乐时有呲呲的杂音,有哪些需要调整的?图如下:
关于这几个电容的作用,在datasheet 10.2.1.2.3 BSN and BSP Capacitors部分有详细介绍,具体如下:
The full H-bridge output stages use only NMOS transistors. Therefore, they require bootstrap capacitors for the
high side of each output to turn on correctly. A 0.22 μF ceramic capacitor, rated for at least 25 V, must be
connected from each output to its corresponding bootstrap input. Specifically, one 0.22 μF capacitor must be
connected from OUTPx to BSPx, and one 0.22 μF capacitor must be connected from OUTNx to BSNx.