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TPS92602BQ问题请教



您好,关于TPS9602BQ电路,有几个疑问:

如下:

这个模拟地和GND可以直接连接么?

此外,如果用外部输入电源,电源的GND和GND是不是可以直接连接在一起?

  • Hi

        这类电源功率GND和芯片模拟GND是隔离开的,然后再连接。

        AGND and PGND must be separated and connected at the input GND connector. • The TPS9260xy-Q1 family of devices has two independent channels. in order to avoid crosstalk, the POWER GND of CH1 and CH2 must be separated and connected at the input GND connector.

  • 但是我看EVB BOARD,那个灯条的地是和电池的地连接的,这个地和GND是不是同一个地?比如我用外部输入的DC电源代替电池,是不是GND就是输入电源的地,AGND就是要分开走,是这个意思么?

  • Hi

        电池的GND, 或者DC电源的GND都是功率GND(PGND),这些GND都有大电流的。需要和AGND分开走,AGND是芯片的模拟GND,一般是comp脚,ss脚,fb脚等等的GND, 没有大电流,noise脚小的GND.