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参数资料
| 型号： | TS4984IQT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| 封装： | 4 X 4 MM, 0.50 MM PITCH, LEAD FREE, TQFN-16 |
| 文件页数： | 14/29页 |
| 文件大小： | 901K |
| 代理商： | TS4984IQT |
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Application Information
TS4984
21/29
Then, the power dissipated by each amplifier is:
and the maximum value is obtained when:
and its value is:
Note:
This maximum value is only depending on power supply voltage and load values.
The efficiency,
η, is the ratio between the output power and the power supply:
The maximum theoretical value is reached when VPEAK = VCC, so that:
The TS4984 has two independent power amplifiers, and each amplifier produces heat due to its power
dissipation. Therefore, the maximum die temperature is the sum of the each amplifier’s maximum power
dissipation. It is calculated as follows:
Pdiss L = Power dissipation due to the left channel power amplifier.
Pdiss R = Power dissipation due to the right channel power amplifier.
Total Pdiss =Pdiss L +Pdiss R (W)
In most cases, Pdiss L = Pdiss R, giving:
or, stated differently:
P
di ss
P
sup pl y
P
out
–
=
W
()
P
diss
22 V
CC
π R
L
------------------------
P
out
P
out
–
=
W
()
P
diss
P
out
--------------------- = 0
P
dissmax
2V
cc
2
π2R
L
-------------
=
W
()
η =
P
out
P
supply
--------------------- =
πV
PEAK
4V
CC
-------------------------
π
4
----- = 78.5%
Total P
diss
2P
di ssL
(W)
=
Total P
diss
42 V
CC
π R
L
------------------------P
out
2P
out
–
=
W
()
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相关代理商/技术参数 |
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|---|---|
| TS4985 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4985EIJT | 功能描述:音频放大器 2x1.2W stereo audio 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 |
| TS4985EIKJT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4985EKIJT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4990 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1W AUDIO POWER AMPLIFIER WITH ACTIVE LOW STANDBY MODE |
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