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TPA3110D2-Q1 Datasheet(PDF) 24 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) 24 Page - Texas Instruments

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OUTP
OUTN
OUTP
Speaker
Current
OUTP
OUTN
OUTP-OUTN
Speaker
Current
OUTP
OUTN
OUTP-OUTN
Speaker
Current
0V
0V
PVCC
NoOutput
PositiveOutput
NegativeOutput
0A
0A
0V
-PVCC
OUTP-OUTN
TPA3110D2-Q1
SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015
www.ti.com
Typical Application (continued)
The bootstrap capacitors connected between the BSxx pins and corresponding output function as a floating
power supply for the high-side N-channel power MOSFET gate drive circuitry. During each high-side switching
cycle, the bootstrap capacitors hold the gate-to-source voltage high enough to keep the high-side MOSFETs
turned on.
8.2.2.8 Differential Inputs
The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel. To
use the TPA3110D2-Q1 with a differential source, connect the positive lead of the audio source to the INP input
and the negative lead from the audio source to the INN input. To use the TPA3110D2-Q1 with a single-ended
source, AC-ground the INP or INN input through a capacitor equal in value to the input capacitor on INN or INP
and apply the audio source to either input. In a single-ended input application, the unused input should be AC-
grounded at the audio source instead of at the device input for best noise performance. For good transient
performance, the impedance seen at each of the two differential inputs should be the same.
The impedance seen at the inputs should be limited to an RC time constant of 1 ms or less if possible. This is to
allow the input DC blocking capacitors to become completely charged during the 14 ms power-up time. If the
input capacitors are not allowed to completely charge, there will be some additional sensitivity to component
matching which can result in pop if the input components are not well matched.
8.2.2.9 Using Low-ESR Capacitors
Low-ESR capacitors are recommended throughout this application section. A real (as opposed to ideal) capacitor
can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this resistor
minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this resistance,
the more the real capacitor behaves like an ideal capacitor.
8.2.3 Application Curve
Figure 42. The TPA3110D2-Q1 Output Voltage and Current Waveforms into an Inductive Load
24
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