Current detection circuit and power integrated circuit

摘要

A current detection circuit includes a first detection circuit, a second detection circuit, and a control selection circuit. The first detection circuit electrically connects between an input terminal and an output terminal and outputs a first detection signal. The second detection circuit electrically connects between the input terminal and the output terminal and outputs a second detection signal. The control selection circuit electrically connects the output terminal, the first detection circuit, and the second detection circuit and selects one of the first and second detection signals as a detection signal.

主权项

1. A current detection circuit for detecting a first output current from a voltage conversion circuit and further outputting a detection signal corresponding to the first output current, the voltage conversion circuit comprising a first input terminal for receiving a first input voltage and a first output terminal, the voltage conversion circuit converting the first input voltage into a first output voltage, the first output voltage and the first output current both going through a loading circuit from the first output terminal, the current detection circuit comprising:
a first detection circuit configured to electrically connect between the first input terminal and the first output terminal and output a first detection signal according to a detected first output current; a second detection circuit configured to electrically connect between the first input terminal and the first output terminal and output a second detection signal according to the detected first output current; and a control selection circuit configured to electrically connect to the first output terminal, the control selection circuit electrically connecting the first detection circuit and the second detection circuit;
wherein when the first output voltage is less than a predetermined reference voltage, the control selection circuit selects the first detection signal as a detection signal and when the first output voltage is greater than the first reference voltage, the control selection circuit selects the second detection signal as a detection signal.