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TS4997 Datasheet(PDF) 23 Page - STMicroelectronics

Part # TS4997
Description  2 x 1W differential input stereo audio amplifier with programmable 3D effects
PDF  34 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS4997 Datasheet(HTML) 23 Page - STMicroelectronics

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TS4997
Application information
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4.7
Power dissipation and efficiency
Assumptions:
●
Load voltage and current are sinusoidal (Vout and Iout)
●
Supply voltage is a pure DC source (VCC)
The output voltage is:
and
and
Therefore, the average current delivered by the supply voltage is:
Equation 3
The power delivered by the supply voltage is:
Equation 4
Psupply = VCC IccAVG (W)
Therefore, the power dissipated by each amplifier is:
Pdiss = Psupply - Pout (W)
Table 9.
3D effect settings
3D effect level
3D0
3D1
OFF
00
LOW
01
MEDIUM
10
HIGH
11
V
out = Vpeak sinωt (V)
I
out =
V
out
R
L
------------- (A)
P
out =
V
peak
2
2R
L
--------------------- (W)
I
ccAVG = 2
V
peak
πR
L
----------------- (A)
P
diss
22V
CC
π R
L
---------------------- P
out Pout W
()
–
=



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