TS4994IST STMicroelectronics, TS4994IST Datasheet - Page 27

IC AMP AUDIO PWR 1W MONO 8MSOP

TS4994IST

Manufacturer Part Number
TS4994IST
Description
IC AMP AUDIO PWR 1W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TS4994IST

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1W x 1 @ 8 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Features
Depop, Differential Inputs, Short-Circuit and Thermal Protection, Standby
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
For Use With
497-6396 - BOARD EVAL FOR LV TS4984IQT497-6395 - BOARD EVAL FOR LP DIFF TS4994IQT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-4452-2

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TS4994IST
Manufacturer:
ST
0
TS4994
Note:
and
Therefore, the average current delivered by the supply voltage is:
Equation 1
The power delivered by the supply voltage is:
Therefore, the power dissipated by each amplifier is:
Equation 2
and the maximum value is obtained when:
and its value is:
Equation 3
This maximum value is only dependent on the power supply voltage and load values.
The efficiency is the ratio between the output power and the power supply:
Equation 4
The maximum theoretical value is reached when V
The maximum die temperature allowable for the TS4994 is 125°C. However, in case of
overheating, a thermal shutdown set to 150°C, puts the TS4994 in standby until the
temperature of the die is reduced by about 5°C.
P
P
supply
P
diss
diss
I
Pdiss
CC
η =
P
=
AVG = 2
=
out
=
η =
max
2 2V
---------------------- P
P
------------------ - =
P
V
π R
∂P
---------------- - = 0
=
supply
P
supply
CC
∂P
π
---- - = 78.5%
=
4
out
V
-------------------- - (W)
diss
2
peak
out
CC
2R
L
π
Vcc
2
V
---------------- - (A)
I
R
CC
πR
L
peak
L
2
P
2
--------------------
πV
PEAK
AVG
4V
L
out
out
(
W
peak
)
CC
P
out
= V
(W)
(W)
CC
, so:
Application information
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