Voltage controller that controls a rate of change of an output voltage

摘要

A rising time detecting circuit detects a rising time of an output voltage, and generates a rising time voltage according to the rising time. A rising time comparing circuit compares the rising time voltage with a target rising voltage, and outputs a rising comparison signal showing a compared result. A FET driving circuit controls an upper MOSFET based on the rising comparison signal. A rising regulating circuit regulates a change speed of the rising time voltage according to a rising regulating signal.

主权项

1. A voltage controller comprising:
a voltage control element that controls a speed to change an output voltage; a rising time detecting circuit that detects a rising time of the output voltage controlled by the voltage control element required for rising from a first reference voltage to a second reference voltage, and generates a rising time voltage according to a length of the rising time; a rising time comparing circuit that compares the rising time voltage generated by the rising time detecting circuit with a target rising voltage showing a target rising time which is a target of the rising time, and outputs a rising comparison signal showing a compared result; and an element control circuit that controls the voltage control element based on the rising comparison signal output by the rising time comparing circuit.