Analog Models for the Digital Subsystems in Switching Converters
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
The invention is described with reference to Fig. 1 which shows a typical switching converter; only the key subsystems like the inverter, rectifier, output filter, etc., are included. The supply voltage is fed in through an input filter comprised of Lf and Cf to an inverter and rectifier combination. The inverter consists of four MOSFET or BJT transistors that are turned on by the control loop. The power transformer steps down the voltage, and two diodes are used for rectification of the AC voltage at the transformer output. The analog signal processor (ASP) compares the actual output voltage Vo with the desired value (the reference), and the processed error voltage is then fed in to the digital signal processor (DSP).