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參數(shù)資料
| 型號(hào)： | TS489IST |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Pop-free 120mW stereo headphone amplifier |
| 中文描述： | 流行無(wú)120mW立體聲耳機(jī)放大器 |
| 文件頁(yè)數(shù)： | 23/32頁(yè) |
| 文件大?。?/td> | 465K |
| 代理商： | TS489IST |
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TS488-TS489
Application information
23/32
and its value is:
Note:
This maximum value depends only on power supply voltage and load values.
The
efficiency
is the ratio between the output power and the power supply:
The
maximum theoretical value
is reached when V
peak
= V
CC
/2, so
4.2
Total power dissipation
The TS488/9 is stereo (dual channel) amplifier. It has two independent power amplifiers.
Each amplifier produces heat due to its power dissipation. Therefore the maximum die
temperature is the sum of each amplifier’s maximum power dissipation. It is calculated as
follows:
■
P
diss R
= Power dissipation due to the right channel power amplifier.
■
P
diss L
= Power dissipation due to the left channel power amplifier.
■
Total P
diss
= P
diss R
+ P
diss L
(W)
Typically, P
diss R
is equal to P
diss L
, giving:
4.3
Lower cut-off frequency
The lower cut-off frequency F
CL
of the amplifier depends on input capacitors C
in
and output
capacitors C
out
.
The input capacitor C
in
(output capacitor C
out
) in serial with the input resistor R
in
(load
resistor R
L
) of the amplifier is equivalent to a first order high pass filter. Assuming that F
CL
is
the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of the C
in
(C
out
) is:
P
diss
MAX
V
π
2
R
L
2
------------
W
(
)
=
η
P
P
supply
------------------
π
V
2V
CC
------------------
=
=
η
π
4
--
78.5%
=
=
TotalP
diss
2P
dissR
2P
dissL
=
=
TotalP
diss
2 2V
π
R
L
----------------------
P
OUT
2P
OUT
–
=
C
in
2
π
F
CL
R
in
---------------------------------------
=
C
out
2
π
F
CL
R
L
--------------------------------------
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS4900 | 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 |
| TS4900ID | 功能描述:音頻放大器 300mW Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| 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 |
| TS4900IST | 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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