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參數(shù)資料
| 型號： | TS4984EKIJT |
| 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)： | 16/29頁 |
| 文件大小： | 1751K |
| 代理商： | TS4984EKIJT |
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TS4984FC
Application Information
23/29
By following the previous rules, the TS4984 can reach near zero pop and click even with high
gains such as 20dB.
Example calculation:
With
Rin =22k and a 20Hz, -3db low cut-off frequency, Cin = 361nF. So, Cin =390nF with
standard value which gives a lower cut-off frequency equal to 18.5Hz. In this case,
(
Rin +2k)x Cin = 9.36ms. When referring to the previous graph, if Cb =1F and Vcc =5V, we
read 20 ms max. This value is twice as high as our current value, thus we can state that pop
and click will be reduced to its lowest value. Minimizing both
Cin and the gain benefits both the
pop phenomena, and the cost and size of the application.
4.9
Application example: Differential-input BTL power stereo
amplifier
The schematic in
Figure 66 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.
Figure 66.
τin max. versus bypass capacitor
12
34
0
40
80
120
160
Vcc=5V
Vcc=3.3V
Vcc=2.6V
Tamb=25
°C
in
m
ax.
(m
s)
Bypass Capacitor Cb ( F)
Gvdif = 2
R2
R1
-------
×
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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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