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參數(shù)資料
| 型號： | TS489IQT |
| 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： | 2 X 2 MM, DFN-8 |
| 文件頁數(shù)： | 16/32頁 |
| 文件大?。?/td> | 570K |
| 代理商： | TS489IQT |
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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 Vpeak = VCC/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:
■ Pdiss R = Power dissipation due to the right channel power amplifier.
■ Pdiss L = Power dissipation due to the left channel power amplifier.
■ Total Pdiss =Pdiss R +Pdiss L (W)
Typically, Pdiss R is equal to Pdiss L, giving:
4.3
Lower cut-off frequency
The lower cut-off frequency FCL of the amplifier depends on input capacitors Cin and output
capacitors Cout.
The input capacitor Cin (output capacitor Cout) in serial with the input resistor Rin (load
resistor RL) of the amplifier is equivalent to a first order high pass filter. Assuming that FCL is
the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of the Cin
(Cout) is:
P
diss
MAX
V
CC
2
π
2
R
L
------------- W
()
=
η
P
OUT
P
supply
-------------------
πV
peak
2V
CC
------------------
==
η
π
4
---
78.5%
==
TotalP
diss
2P
dissR
2P
dissL
==
TotalP
diss
22VCC
π R
L
---------------------- P
OUT
2P
OUT
–
=
C
in
1
2
π F
CL
R
in
----------------------------------------
=
C
out
1
2
π F
CL
R
L
--------------------------------------
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS489IST | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS489IST | 功能描述:音頻放大器 Popfree 100mW stereo headphone 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 |
| 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 |
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