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TS4984 датащи(PDF) 20 Page - STMicroelectronics

номер детали TS4984
подробное описание детали  2 x 1W Stereo audio power amplifier with active low standby mode
PDF  29 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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TS4984 датащи(HTML) 20 Page - STMicroelectronics

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TS4984
Application Information
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The following graph (Figure 65) shows an example of Cin and Cfeed influence.
4.4 Power dissipation and efficiency
Hypotheses:
l Voltage and current in the load are sinusoidal (Vout and Iout).
l Supply voltage is a pure DC source (Vcc).
Regarding the load we have:
and
and
Therefore, the average current delivered by the supply voltage is:
The power delivered by the supply voltage is:
Figure 65: Frequency response gain versus Cin & Cfeed
10
100
1000
10000
-25
-20
-15
-10
-5
0
5
10
Rin = Rfeed = 22k
Tamb = 25
°C
Cfeed = 2.2nF
Cfeed = 680pF
Cfeed = 330pF
Cin = 470nF
Cin = 82nF
Cin = 22nF
Frequency (Hz)
V
out = VPEAK sinωt
(V)
I
out =
V
out
R
L
--------------
(A)
P
out =
V
PE AK
2
2R
L
-------------------------
(W)
I
CC
AV G
= 2
V
PEAK
πR
L
-------------------
(A)
P
su ppl y
V
CC
I
CC
AVG
=
W
()



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