The purpose of this paper is to develop the SMPS(Switched Mode Power Supply) for the implementation of the charge-discharge system of the UPS(Uninterruptible Power System) with the DC-DC buck converter. The proposed SMPS is designed to be able to switch two different output voltage levels and it has provided a circuit configuration for the two output voltage. This SMPS operated the generator circuit of the output voltage in response to the state of the High/Low of the output selected signal. As the rest of the circuit groups are not driven, unnecessary power consumption is minimized. The equipment with a high battery power is possible to charge by using the 2 fuse-2 outlet cable on the 12~70V DC area. The equipment with a low battery power is possible to charge by using the 8Fuse-8prong cable on the 12V DC area. Eventually, the developed SMPS system is capable of controlling by a simple switch as well as efficient.
LINK http://www.mediafire.com/view/hyxxmty5avzwr32/Design_and_Implementation_of_an_SMPS_for_UPS.pdf
