US 2024/0204767 A1 · SEMICONDUCTOR INTEGRATED CIRCUIT

Abstract

A semiconductor integrated circuit includes a drive terminal, first and second sense terminals, a current source that generates a drive current to be supplied to the drive terminal, an amplifier circuit that differentially amplifies a sense voltage between the first and second sense terminals, and outputs an analog differential voltage, an analog-to-digital converter that converts the analog differential voltage output from the amplifier circuit into a digital value, a command circuit that generates a command signal based on the digital value, so that the sense voltage does not deviate outside a predetermined range, an overcurrent detection circuit that asserts a detection signal when the sense voltage exceeds a predetermined voltage, and a logic circuit that generates a drive pattern for causing the current source to generate the drive current according to the command signal, and stops the supply of the drive current when the detection signal is asserted.

Claims10

Dependent claims

A semiconductor integrated circuit comprising:

a drive terminal;
a first sense terminal;
a second sense terminal;
a current source configured to generate a drive current to be supplied to the drive terminal;
an amplifier circuit configured to differentially amplify a sense voltage between the first sense terminal and the second sense terminal, and output an analog differential voltage;
an analog-to-digital converter configured to convert the analog differential voltage output from the amplifier circuit into a digital value;
a command circuit configured to generate a command signal based on the digital value, so that the sense voltage does not deviate outside a predetermined range;
an overcurrent detection circuit configured to assert a detection signal when the sense voltage exceeds a predetermined voltage;
and
a logic circuit configured to generate a drive pattern for causing the current source to generate the drive current according to the command signal, and stop the supply of the drive current when the detection signal is asserted.

7 more elements

A semiconductor integrated circuit comprising:

a drive terminal;
a first sense terminal;
a second sense terminal;
a current source configured to generate a drive current to be supplied to the drive terminal;
an amplifier circuit configured to differentially amplify a sense voltage between the first sense terminal and the second sense terminal, and output an analog differential voltage;
an analog-to-digital converter configured to convert the analog differential voltage output from the amplifier circuit into a digital value;
a command circuit configured to vary a command signal according to a variation in the digital value, and stop varying the command signal when the digital value reaches a limit value;
an overcurrent detection circuit configured to assert a detection signal when the sense voltage exceeds a predetermined voltage;
and
a logic circuit configured to generate a drive pattern for causing the current source to generate the drive current according to the command signal, and stop the supply of the drive current when the detection signal is asserted.

7 more elements

Dependencies are inferred from the claim text.

Semiconductor integrated circuit

Life of this patent

Semiconductor integrated circuit

Life of this patent

Abstract

Claims10