Skyworth 8K80 movement / 8K81 movement "cool open" circuit

Single chip microcomputer STM32L151CCU6

Spring core QX2303L33T

8K80-K10 series and 8K81-LED10 series "Cool Open" board circuit are basically the same, the software is completely consistent, the main chip name and function are shown in Table 1.8K81. The MIC socket and 4558 circuit are placed on the "cool open board", and the two will be A USB socket is placed on the main board, and a separate isolation transformer (ie, U13) is used for the RJ45 network cable jack, as shown in FIG. 1 , and the RJ45 of the 8K80 movement has an isolation transformer, and the others are identical. The power supply circuit of these two kinds of "cool" boards is shown in Figure 2.

Table 1 Main chip names and functions

figure 1

figure 2