TS4990EKIJT STMICROELECTRONICS [STMicroelectronics], TS4990EKIJT Datasheet - Page 19

• Manufacturer Part Number: TS4990EKIJT
• Description: 1.2 W audio power amplifier with active low standby mode
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

TS4990
4.4
The graph in
Figure 60. Frequency response gain vs. C
Power dissipation and efficiency
Hypotheses:
●
●
The load can be expressed as:
and
and
Therefore, the average current delivered by the supply voltage is:
The power delivered by the supply voltage is:
Load voltage and current are sinusoidal (V
Supply voltage is a pure DC source (V
Figure 60
shows an example of C
-10
-15
-20
-25
10
-5
5
0
10
P
supply
Cin = 82nF
V
I
CC
P
out
out
I
AVG
=
out
100
Cin = 22nF
=
V
=
Cin = 470nF
V
Frequency (Hz)
=
=
CC
V
------------------------ -
CC
PEAK
2
V
------------ -
PEAK
2R
R
V
--------------------- -
⋅
out
).
in
PEAK
L
πR
in
out
I
L
CC
Cfeed = 330pF
and C
sin
and C
L
2
Cfeed = 680pF
and I
AVG
ω
1000
Rin = Rfeed = 22k Ω
Tamb = 25 ° C
t
Cfeed = 2.2nF
(A)
(W)
feed
feed
out
(A)
(V)
(W)
).
influence.
10000
Application information
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