參數(shù)資料
型號(hào): TSDC05IJT
廠商: STMICROELECTRONICS
元件分類(lèi): 音頻/視頻放大
英文描述: 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝: LEAD FREE, FCP-9
文件頁(yè)數(shù): 11/32頁(yè)
文件大小: 714K
代理商: TSDC05IJT
TS4990
Application information
19/32
The graph in Figure 60 shows an example of Cin and Cfeed influence.
Figure 60.
Frequency response gain vs. Cin and Cfeed
4.4
Power dissipation and efficiency
Hypotheses:
Load voltage and current are sinusoidal (Vout and Iout).
Supply voltage is a pure DC source (VCC).
The load can be expressed as:
and
Therefore, the average current delivered by the supply voltage is:
The power delivered by the supply voltage is:
10
100
1000
10000
-25
-20
-15
-10
-5
0
5
10
Rin = Rfeed = 22k
Ω
Tamb = 25
°C
Cfeed = 2.2nF
Cfeed = 680pF
Cfeed = 330pF
Cin = 470nF
Cin = 82nF
Cin = 22nF
G
a
in
(dB
)
Frequency (Hz)
V
out = VPEAK sin ωt
(V)
I
out =
V
out
R
L
-------------
(A)
P
out =
V
PEAK
2
2R
L
-------------------------
(W)
I
CC
AVG
=
2
V
PEAK
πR
L
----------------------
(A)
P
supply
V
CC
I
CC
AVG
(W)
=
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