A wide variety of smps/dc-dc converter models are available with salient and special features like latest state-of-art- current mode pwm controller, dc ups for battery backed instruments, alarm, fan fail/over temperature shut down, external shut down signal, remote sensing, programmable smps, 0.5 v control for out put voltage and current setting etc. Mosfets and ufr diodes are used which increases reliability and efficiency and psu with separate battery and load terminals with separate current setting are also used .It is indeed a compact, light weight and efficient device which helps in saving valuable and costly power. It is suitable for many wide applications in oems, compact instruments/equipments, panel manufacturing, plc, telecommunication, epabx, pco monitors, weighing scales, cash registers, float battery chargers, halogen lamps for lighting and medical applications, wireless communication, alarm annunciators etc.