Lasttreiberschaltung

Details

Veröffentlichungs-Nr.

EP3038223

Aktenzeichen

EP15199762

Anmeldetag

14. Dezember 2015

Veröffentlichung

4. April 2018

Erteilung

4. April 2018

Rechtsraum

EP

IPC

H02H3/00H02M1/08H02M1/34H03K17/0814

Abstract

A first comparator CP1 compares a voltage of an output terminal OUT with a first reference voltage V1 is lower than a voltage E inputted to a power terminal Vcc to detect a load open state where a switching element Q1 is off and a load 20 is not connected to output terminal. A second comparator CP2 compares voltage of output terminal OUT with a second reference voltage V2 is lower than voltage E and higher than a clamp voltage to detect a power fault state. A clamp circuit 14 clamps voltage of output terminal to a clamp voltage is higher than first reference voltage and lower than voltage E in load open state, a capacitor C1. A bootstrap circuit 10 feeds a charging current to an amp terminal at a constant voltage generated based on voltage of a power supply. A clamp voltage rise suppressing circuit 16 suppresses a rise in clamp voltage of clamp circuit when first comparator detects load open state.

Anmelder

Firma

SANKEN ELECTRIC CO., LTD.

Land

🇯🇵 Japan

Fachgebiete