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参数资料
| 型号： | TS489IST |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.13 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | MINI, SOP-8 |
| 文件页数： | 16/32页 |
| 文件大小： | 570K |
| 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 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
--------------------------------------
=
相关PDF资料 |
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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4900 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4900ID | 功能描述:音频放大器 300mW Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TS4900IDT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4900IS | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
| TS4900IST | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE HIGH |
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