Überstromerkennungsschaltung

Details

Veröffentlichungs-Nr.

EP3229229

Aktenzeichen

EP17164969

Anmeldetag

5. April 2017

Veröffentlichung

12. Juni 2019

Erteilung

12. Juni 2019

Rechtsraum

EP

IPC

G01R19/165H03K19/0175H03K17/082G09G3/00G09G3/36

Abstract

An overcurrent detection circuit, which detects overcurrent of a load driving device (D1, Q1, Q2) arranged to drive a capacitance load (C1, R1) by switching a voltage (Vout) applied to the capacitance load between high level (Von) and low level (Voff), includes a clock signal generation unit (2) arranged to generate a clock signal (CK), a comparing unit (3) arranged to compare a physical quantity (VDS of Q1) corresponding to current supplied from the load driving device to the capacitance load with a predetermined value (Vref1), and a determination unit (4) arranged to determine whether or not the load driving device is in an overcurrent state based on the clock signal (CK) and a result of the comparison (3out) by the comparing unit (3), during a period in which the load driving device (D1, Q1, Q2) applies a high level voltage (Vin at high, Vout high) to the capacitance load.

Anmelder

Firma

Rohm Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete