TPA3112D1

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SLOS654A – SEPTEMBER 2009 – REVISED JULY 2010

SHORT-CIRCUIT PROTECTION AND AUTOMATIC RECOVERY FEATURE

TPA3112D2 has protection from over-current conditions caused by a short circuit on the output stage. The short

circuit protection fault is reported on the FAULT pin as a low state. The amplifier outputs are switched to a Hi-Z

state when the short circuit protection latch is engaged. The latch can be cleared by cycling the SD pin through

the low state.

If automatic recovery from the short circuit protection latch is desired, connect the FAULT pin directly to the SD

pin. This will allow the FAULT pin function to automatically drive the SD pin low which will clear the short circuit

protection latch.

THERMAL PROTECTION

Thermal protection on the TPA3112D1 prevents damage to the device when the internal die temperature

exceeds 150°C. There is a ±15°C tolerance on this trip point from device to device. Once the die temperature

exceeds the thermal set point, the device enters into the shutdown state and the outputs are disabled. This is not

a latched fault. The thermal fault is cleared once the temperature of the die is reduced by 15°C. The device

begins normal operation at this point with no external system interaction.

Thermal protection faults are NOT reported on the FAULT terminal.

Copyright © 2009–2010, Texas Instruments Incorporated

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Product Folder Link(s): TPA3112D1