Power management of switching mode power supplies

Yutaka Electric MFG. Co., Ltd. develops, manufactures and sells devices for switching power supply (AC-DC, DC-DC) and uninterruptible power supply (UPS). As mobile facilities and the UPS became widely used, demands are increasing for DC-DC converters, battery chargers and switching power supplies. The power supply circuits described herein are designed to work with the techniques such as variable output voltage based on signals from CPU and control of remaining battery power using a bus for an entire system, which techniques are becoming standards for these circuits.