TPA3112D1-Q1

SLOS793B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015

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7 Detailed Description

7.1 Overview

The TPA3112D1-Q1 is AEC-Q100 qualified with a temperature grade 1 (-40°C to 125°C), HBM ESD

classification level H2, and CDM ESD classification level C2. This automotive audio amplifier also features

several protection mechanisms.

•

DC Current Detection

–

The TPA3112D1-Q1 protects speakers from DC current by reporting a fault on the FAULT pin and turning

the amplifier outputs to a Hi-Z state when a DC current is detected. The PVCC supply must be cycled to

clear this fault.

•

Short-Circuit Protection and Automatic Recovery

–

The TPA3112D1-Q1 has short circuit protection from the output pins to VCC, GND, or to each other. If a

short circuit is detected, it will be reported on the FAULT pin and the amplifier outputs will be switched to a

Hi-Z state. The fault can be cleared by cycling the SD pin.

•

Thermal Protection

–

When the die temperature exceeds 150°C (±15°C) the device enters the shutdown state and the amplifier

outputs are disabled. The TPA3112D1-Q1 recovers automatically when the temperature decreases by

15°C.

10

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