TS4990IST STMicroelectronics, TS4990IST Datasheet - Page 19

IC AMP AUDIO PWR 1.2W MONO 8MSOP

TS4990IST

Manufacturer Part Number
TS4990IST
Description
IC AMP AUDIO PWR 1.2W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TS4990IST

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1.2W x 1 @ 8 Ohm
Voltage - Supply
2.2 V ~ 5.5 V
Features
Depop, Differential Inputs, Standby, Thermal Protection
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
For Use With
497-6383 - BOARD DEMO FOR TS4990
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-4451-2
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
19/32

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