Schaltung zur Kurzschlusserkennung in Klasse-D Vollbrückenverstärkern und Entsprechendes Verfahren

Details

Veröffentlichungs-Nr.

EP4757177

Anmeldetag

4. Dezember 2025

Veröffentlichung

10. Juni 2026

Rechtsraum

EP

Abstract

A circuit (35) for detecting electrical short circuits in a full-bridge class-D amplifier that comprises: a first branch (HP, LP) comprising a first high-side switch (HP) and a first low-side switch (LP); and a second branch (HM, LM) comprising a second high-side switch (HM) and a second low-side switch (LM). The circuit (35) comprising: a measuring unit configured to provide a first measure of a first operating characteristic of the high-side switch (HP; HM) comprised in one of the first branch (HP, LP) and the second branch (HM, LM) of the full-bridge class-D amplifier, and a second measure of a second operating characteristic of the low-side switch (LM; LP) comprised in the other of the first branch (HP, LP) and the second branch (HM, LM) of the full-bridge class-D amplifier; a checking unit configured to receive from the measuring unit the first measure and the second measure and to provide an unbalance signal indicative of the presence of unbalance between said first measure and said second measure; and a detection unit configured to receive from the checking unit said unbalance signal and to detect the presence of an electrical short circuit in response to said unbalance signal indicating the presence of unbalance between said first measure and said second measure.

Anmelder

Firma

STMicroelectronics International N.V.

Land

🇨🇭 Schweiz