New automotive primary DC-DC converters ensuring stable operation

The series provides stable operation throughout battery input voltage fluctuation, decreasing output overshoot to less than 1/10th compared to conventional products. This eradicates the necessity for further output capacitors commonly needed to decrease overshoot voltages. Also, adopting a new control method makes it feasible to attain both high efficiency and fast load response (which are in a trade-off relationship). The converters provide a 92% power conversion efficiency at heavy loads (at 1A output current), but also 85% efficiency at light loads (1mA), and, therefore, attain class-leading efficiency over the whole load range. This lowers power consumption, which leads to a decrease in CO2 emissions, and the parasitic discharge of the battery is also lessened.