The Design and Research Based on the DSP Digital Switching Power Supply

The so-called digital control power source, also referred to as a "loop inside the processor" refers to the system controller can execute the control algorithm in the digital domain. It is necessary to compare the two to produce strings of digital pulse width to drive the power switch, but instead of using a conventional analog PWM comparator. It will all analog system parameters into a digital signal in the digital domain and using the data to calculate the control response, and the newly generated control information is transmitted to the system increases. By digitally controlled analog circuits can greatly reduce system cost and power consumption. In addition, many microcontroller and DSP have been included in the PWM controller chip, which allows the realization of the digital control has become easier.