TPA3110D2-Q1

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SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015

Table 1. DC Detect Threshold

AV (dB)

20

112

26

56

32

28

36

17

7.3.2 Short-Circuit Protection and Automatic Recovery Feature

TPA3110D2-Q1 has protection from overcurrent 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 allows the FAULT pin function to automatically drive the SD pin low, which clears the short-circuit

protection latch.

7.3.3 Thermal Protection

Thermal protection on the TPA3110D2-Q1 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.

7.3.4 GVDD Supply

The GVDD supply is used to power the gates of the output full bridge transistors. It can also be used to supply

the PLIMIT voltage divider circuit. Add a 1-

μF capacitor to ground at this pin.

7.4 Device Functional Modes

7.4.1 PBTL Select

Use the PBTL pin to select between PBTL mode when held high or BTL mode when held low. Connect the

speaker between the right and left outputs, with the positive and negative output from each channel tied together.

7.4.2 Gain Setting Through GAIN0 and GAIN1 Inputs

The gain of the TPA3110D2-Q1 is set to one of four options by the state of the GAIN0 and GAIN1 pins.

Changing the gain setting also changes the input impedance of the TPA3110D2-Q1.

Refer to Table 2 for a list of the gain settings.

Table 2. Gain Setting

AMPLIFIER GAIN (dB)

INPUT IMPEDANCE (k

Ω)

GAIN1

GAIN0

TYP

TYP

0

0

20

60

0

1

26

30

1

0

32

15

1

1

36

9

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