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TPA3110D2-Q1 Datasheet(PDF) 16 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) 16 Page - Texas Instruments

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L
P
L
S
OUT
L
2
R
x V
R + 2 x R
P
=
for unclipped power
2 x R
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TPA3110D2-Q1
Power Limit Function
Vin=1.13
Freq=1kHz RLoad=8W
VPP
PLIMIT = 1.8V Pout = 5W
PLIMIT = 3V Pout = 10W
PLIMIT = 6.96V Pout = 11.8W
Vinput
TPA3110D2-Q1
SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015
www.ti.com
7.4.3
SD Operation
The SD pin can be used to enter the shutdown mode which mutes the amplifier and causes the TPA3110D2-Q1
to enter a low-current state. This mode can also be triggered to improve power-off pop performance.
7.4.4 PLIMIT
The PLIMIT pin limits the output peak-to-peak voltage based on the voltage supplied to the PLIMIT pin. The peak
output voltage is limited to four times the voltage at the PLIMIT pin.
Figure 35. PLIMIT Circuit Operation
The PLIMIT circuit sets a limit on the output peak-to-peak voltage. The limiting is done by limiting the duty cycle
to fixed maximum value. This limit can be thought of as a virtual voltage rail which is lower than the supply
connected to PVCC. This virtual rail is four times the voltage at the PLIMIT pin. This output voltage can be used
to calculate the maximum output power for a given maximum input voltage and speaker impedance.
(1)
Where:
RS is the total series resistance including RDS(on), and any resistance in the output filter.
RL is the load resistance.
VP is the peak amplitude of the output possible within the supply rail.
VP = 4 × PLIMIT voltage if PLIMIT < 4 × VP
POUT (10%THD) = 1.25 × POUT (unclipped)
16
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