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參數資料
| 型號： | TS4975EIJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA12 |
| 封裝： | LEAD FREE, FLIP CHIP, 12 PIN |
| 文件頁數： | 21/36頁 |
| 文件大?。?/td> | 870K |
| 代理商： | TS4975EIJT |
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Application Information
TS4975
28/36
The efficiency is the ratio between the output power and the power supply:
The maximum theoretical value is reached when VPEAK = VCC/2, so
The TS4975 is a stereo amplifier so 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 1 = Power dissipation due to the first channel power amplifier.
Pdiss 2 = Power dissipation due to the second channel power amplifier.
Total Pdiss =Pdiss 1 +Pdiss 2 (W)
In most cases,
Pdiss 1 = Pdiss 2, giving:
Single ended configuration:
Phantom ground configuration:
4.4
Low frequency response
Input capacitor Cin
The input coupling capacitor blocks the DC part of the input signal at the amplifier input. In the
low-frequency region, Cin starts to have an effect. Cin with Zin forms a first-order, high-pass filter
with -3 dB cut-off frequency.
Zin is the input impedance of the corresponding input (30 k for In1 & In2).
Note:
For all inputs, the impedance value remains for all gain settings. This means that the lower cut-
off frequency doesn’t change with gain setting. Note also that 30 k
is a typical value and there
is tolerance around this value (see Chapter 3: Electrical Characteristics on page 5).
From
Figure 53 you could easily establish the Cin value for a -3dB cut-off frequency required.
η
P
out
P
sup ply
-------------------
πV
PEAK
4V
CC
---------------------
==
η
π
8
---
39.25%
==
TotalP
diss
2P
diss1
=
TotalP
diss
22VCC
π R
L
---------------------- P
ou t
2P
ou t W
()
–
=
TotalP
diss
42VCC
π R
L
---------------------- P
out
2P
ou t W
()
–
=
F
CL
1
2
πZ
inCin
------------------------Hz
()
=
相關PDF資料 |
PDF描述 |
|---|---|
| TS4982IQT | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32 |
| TS4984EIJT | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| TS4984EIKJT | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| TS4984EKIJT | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| TS4984IQT | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TS4982IQT | 功能描述:音頻放大器 2W Stereo Audio Amp 125 mW 16 ohm 3 lvl RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS4984 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 1W Stereo audio power amplifier with active low standby mode |
| TS4984EIJT | 功能描述:音頻放大器 2x1.2W stereo audio RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TS4984EIKJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode |
| TS4984FC | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode |
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