Patent ID: 8525498
Filing Date: 2013-09-03
Classification: H02M

Abstract:
1. A voltage regulator circuit, comprising: a switching circuit having an input current; a current average circuit electrically coupled to said switching circuit to generate a signal indicative of the average value of said input current; and a current limit circuit electrically coupled to said switching circuit and said current average circuit to limit said average value of said input current to a value, wherein said switching circuit further comprises an input switch through which said input current flows; wherein said current average circuit comprises: wherein said first switch is turned on and off complementarily to said input switch; wherein said current limit circuit compares the voltage across said first capacitor with a threshold voltage and turns off said input switch when said voltage across said first capacitor and said threshold voltage fulfill a relationship; wherein said relationship is that said voltage across said first capacitor is larger than said threshold voltage; the circuit further comprising a threshold correction circuit operable to adjust said threshold value along with said first capacitor; and wherein said threshold correction circuit is integrated in the same IC with said current average circuit and comprising: