The digital power controller UCD3138 contains an AFE (analog front end) module and a Filter module for loop feedback of the output voltage. After the above modules are flexibly configured and combined, the average value calculation of the signal input to the EADC (differential ADC) module can also be completed. The key configuration involves the oversampling function (oversample) of the EADC, the averaging function (averaging) function and the integration branch configuration of the Filter module. Considering that the average value of the output signal of the current transformer is proportional to the actual input current, the actual input current information can be obtained by reading the average value of the output signal.
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