參數(shù)資料
型號(hào)： TS489IST
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝： MINI, SOP-8
文件頁(yè)數(shù)： 15/32頁(yè)
文件大?。?/td> 570K
代理商： TS489IST
Application information
TS488-TS489
22/32
4
Application information
4.1
Power dissipation and efficiency
Hypotheses:
■ Voltage and current in the load are sinusoidal (Vout and Iout).
■ Supply voltage is a pure DC source (VCC).
Regarding the load we have:
and
The average current delivered by the power supply voltage is:
Figure 78.
Current delivered by power supply voltage in single-ended configuration
The power delivered by power supply voltage is:
So, the power dissipation by each power amplifier is
and the maximum value is obtained when:
V
OUT
V
PEAK
ωtV
()
sin
=
I
OUT
V
OUT
R
L
-------------- A
()
=
P
OUT
V
PEAK
2
2R
L
----------------- A
()
=
I
CC
AVG
1
2
π
------
V
PEAK
R
L
-----------------
t
()
sin
t
d
0
π
∫
V
PEAK
πR
L
----------------- A
()
==
Icc (t)
Time
T/2
T
Icc
AVG
Vpeak/R
L
03T/2
2T
P
supply
V
CCICC
AVG
W
()
=
P
diss
P
supply POUT W
()
–
=
P
diss
2VCC
π R
L
------------------- P
OUT
P
OUT W
()
–
=
P
OUT
P
diss
0
=
相關(guān)PDF資料
PDF描述
TS4890IDT 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS4890ID 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS4890IST 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS4890IQT 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8
TS4890IS 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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TS4900IDT 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH
TS4900IS 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH
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