TS4990IST STMicroelectronics, TS4990IST Datasheet - Page 19
TS4990IST
Manufacturer Part Number
TS4990IST
Description
IC AMP AUDIO PWR 1.2W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet
1.TS4990IST.pdf
(32 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TS4990IST
Manufacturer:
ST
Quantity:
56 000
Company:
Part Number:
TS4990IST
Manufacturer:
ST
Quantity:
3 190
Part Number:
TS4990IST
Manufacturer:
ST
Quantity:
20 000
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