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TPA3110D2-Q1 Datasheet(PDF) 15 Page - Texas Instruments

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Part # TPA3110D2-Q1
Description  Filter-Free Stereo Class-D Audio Power Amplifier
Download  36 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPA3110D2-Q1 Datasheet(HTML) 15 Page - Texas Instruments

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TPA3110D2-Q1
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SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015
Table 1. DC Detect Threshold
AV (dB)
VIN (mV, Differential)
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
Copyright © 2012–2015, Texas Instruments Incorporated
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