Patent ID: 7796365

Claim:
A power converter comprising: an error amplifier configured to compare a reference voltage to a regulated output voltage; a pulse width modulator coupled to the error amplifier and configured to modify the regulated output voltage based on the comparison in the error amplifier; a current sensing element coupled to the pulse width modulator and configured to sense a first current; a set resistor having a resistance R set ; and an integrated circuit coupled to the current sensing element and the set resistor, the integrated circuit configured to receive the first sensed current and output a current indicative of a load current based on the first sensed current, wherein the integrated circuit comprises: a sense resistor having a resistance R sense , the sense resistor coupled to an input of the integrated circuit such that the first sensed current flows through the sense resistor; a reference resistor having a resistance R reference which is a fixed multiple of R sense ; and circuitry configured to produce the output current such that the value of the output current is proportional to R set and a fixed ratio between R sense and R reference .