US 2022/0011796 A1 · Linear Power Supply

Abstract

A linear power source 1 comprises: an output transistor 10 that is connected between an input end of an input voltage VIN and an output end of an output voltage VOUT; a driver 30 for driving the output transistor 10 so that a feedback voltage VFB according to the output voltage VOUT matches a reference voltage VREF; a current detection unit 50 for detecting an output current IOUT flowing to the output transistor 10; and a voltage adjustment unit 40 for adjusting the reference voltage VREF or the feedback voltage VFB so that a differential voltage between a first voltage (for example, VIN itself) according to the input voltage VIN and a second voltage (for example, VOUT itself) according to the output voltage VOUT or the reference voltage VREF will not fall below an offset voltage Voffset according to the output current IOUT.

Claims20

Dependent claims

A linear power supply, comprising:

an output transistor configured to be connected between an input terminal for an input voltage and an output terminal for an output voltage;
a driver configured to drive the output transistor such that a feedback voltage commensurate with the output voltage remains equal to a reference voltage;
a current detector configured to sense an output current passing through the output transistor;
and
a voltage adjuster configured to adjust the reference voltage or the feedback voltage such that a differential voltage between a first voltage commensurate with the input voltage and a second voltage commensurate with the output voltage or the reference voltage does not fall below an offset voltage commensurate with the output current.

2 more elements

Dependencies are inferred from the claim text.

Linear Power Supply

Life of this patent

Linear Power Supply

Life of this patent

Abstract

Claims20