SEMICONDUCTOR DEVICE

摘要

A semiconductor high-side driver including; an input terminal; an output terminal to be coupled to a load element; an output MOS transistor having a drain coupled to a power supply terminal, a source coupled to the output terminal and a gate; a sense MOS transistor having a drain coupled to the power supply terminal, a gate coupled to the gate of the output MOS transistor and a source; a control circuit coupled to the input terminal and provides a control signal to the gate of the output MOS transistor; and a voltage detection circuit which includes: a threshold voltage generation circuit having a first terminal coupled to the power supply terminal and a second terminal which generates a voltage lower than a voltage of the power supply terminal by a threshold voltage; and a comparator.

主权项

1. A semiconductor high-side driver comprising:
a power supply terminal; an input terminal; an output terminal to be coupled to a load element; an output MOS transistor having a drain coupled to the power supply terminal, a source coupled to the output terminal and a gate; a sense MOS transistor having a drain coupled to the power supply terminal, a gate coupled to the gate of the output MOS transistor and a source; a control circuit coupled to the input terminal and provides a control signal to the gate of the output MOS transistor; and a voltage detection circuit which includes:
a threshold voltage generation circuit having a first terminal coupled to the power supply terminal and a second terminal which generates a voltage lower than a voltage of the power supply terminal by a threshold voltage; anda comparator having:
a first input coupled to the second terminal of the threshold voltage generation circuit;a second input coupled to the source of the sense MOS transistor; andan output for providing a detection signal, wherein the detection signal is of a high level when a voltage at the first input thereof is higher than a voltage at the second input thereof, and wherein the detection signal is of a low level when a voltage at the first input thereof is lower than a voltage at the second input thereof.