A fast transient response technique for DPWM DC-DC converters

The demand for adaptive and smart power distributing is becoming very popular in the commercial power line such as a smart grid. The information from the load condition is very important for the distributing. To obtain such information from the multiple-load, the digital control for switching mode power supply (SMPS) is effective. Usually, the digital controller is consisted of DSPs or microprocessors performing with software. But, such as for point of load (POL), adapting digital controller isn´t still popular because of its cost or response characteristics even if the controllers are constructed by FPGA or custom LSI which is hardware-logic base. This paper will discuss about the proposed hardware logic type digital controller for POL, which is very simple and unique design. And, accuracy improved output voltage detection method for the proposed digital controller is proposed. The some experiments are done. And the results show the validity of the proposed circuits.