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This UPS application utilizes high-frequency switching techniques to implement three optimized digital power-conversion stages. The dsPIC33F "GS" series of digital-power DSCs from Microchip is the heart of this Offline UPS application. The dsPIC33F controls all critical operations of the system, as well as the housekeeping operations. Fast and reliable switchover from mains to inverter, and vice-versa, is done intelligently to ensure that power to the load is transferred without surges and sags.
Devices that are well suited for UPS applications include ones from the SMPS and Digital Power Conversion family such as thedsPIC33FJ16GS504.
View the entire SMPS & Digital Power Conversion Family here.