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參數(shù)資料
| 型號： | TS4984EIKJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA15 |
| 封裝： | LEAD FREE, FCP-15 |
| 文件頁數(shù)： | 17/30頁 |
| 文件大小： | 1644K |
| 代理商： | TS4984EIKJT |
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Application Information
TS4984FC
24/30
4.9
Application example: differential-input BTL power stereo
amplifier
The schematic in
Figure 67 shows how to design the TS4984 to work in differential-input mode.
For this discussion, only the left-channel amplifier will be referred to.
Let:
R1R =R2L =R1, R2R =R2L =R2
CinR = CinL =Cin
The gain of the amplifier is:
In order to reach the optimal performance of the differential function,
R1 and R2 should be
matched at 1% maximum.
The value of the input capacitor Cin can be calculated with the following formula, using the -3dB
lower frequency required (where FL is the lower frequency required):
Figure 67. Differential input amplifier configuration
G
Vdif= 2
R2
R1
--------
R1L
CinL
R2L
VCC
+ Cs
+ Cb
Neg. Input LEFT
8 Ohms
LEFT Speaker
8 Ohms
RIGHT Speaker
R1R
CinR
R2R
Neg. Input RIGHT
StandBy
Control
R1L
CinL
Pos. Input LEFT
R1R
CinR
Pos. Input RIGHT
R2L
R2R
Bias
StandBy
VC
C
1
GN
D
1
BypassL
GN
D
2
VC
C
2
VO-L
VO+L
VO-R
VO+R
IN-L
IN+L
IN+R
IN-R
+
-
+
-
+
-
AV = -1
+
-
AV = -1
BypassR
TS4984
C
in
1
2
πR
1FL
---------------------
(F)
≈
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| TS4984IQT | 功能描述:音頻放大器 2x1W stereo 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 |
| TS4985 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
| TS4985EIJT | 功能描述:音頻放大器 2x1.2W stereo audio 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 |
| TS4985EIKJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins |
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