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參數(shù)資料
| 型號： | TPA2026D2YZHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | AUDIO AMPLIFIER, PBGA16 |
| 封裝： | 2.20 X 2.20 MM, GREEN, DSBGA-16 |
| 文件頁數(shù)： | 8/39頁 |
| 文件大小： | 823K |
| 代理商： | TPA2026D2YZHR |
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Gain-dB
V
-dBV
IN
V
-dBV
O
U
T
V
-dBV
IN
Increasing
FixedGain
Decreasing
FixedGain
FixedGain=6dB
FixedGain=3dB
1:1
SLOS649A – MARCH 2010 – REVISED JANUARY 2011
www.ti.com
Figure 32. Input Signal Voltage vs Gain
Thus the AGC performs a mapping of the input signal vs. the output signal amplitude. This mapping can be
modified according to the variables from Table 1.
The following graphs and explanations show the effect of each variable to the AGC independently and which
considerations should be taken when choosing values.
Fixed Gain: The fixed gain determines the initial gain of the AGC. Set the gain using the following variables:
Set the fixed gain to be equal to the gain when the AGC is disabled.
Set the fixed gain to maximize SNR.
Set the fixed gain such that it will not overdrive the speaker.
Figure 33 shows how the fixed gain influences the input signal amplitude vs. the output signal amplitude state
diagram. The dotted 1:1 line is displayed for reference. The 1:1 line means that for a 1dB increase in the input
signal, the output increases by 1dB.
Figure 33. Output Signal vs Input Signal State Diagram Showing Different Fixed Gain Configurations
If the Compression function is enabled, the Fixed Gain is adjustable from –28dB to 30dB. If the Compression
function is disabled, the Fixed gain is adjustable from 0dB to 30dB.
Limiter Level: The Limiter level sets the maximum amplitude allowed at the output of the amplifier. The limiter
should be set with the following constraints in mind:
Below or at the maximum power rating of the speaker
Below the minimum supply voltage in order to avoid clipping
Figure 34 shows how the limiter level influences the input signal amplitude vs. the output signal amplitude state
diagram.
16
Copyright 2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TPA2026D2
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| TPA2026D2YZHT | 功能描述:音頻放大器 3.2W/Ch Stereo Smart Gain Class-D Aud 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 |
| TPA2028D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain? AGC/DRC |
| TPA2028D1_10 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGaina?￠ AGC/DRC |
| TPA2028D1YZFEVM | 功能描述:音頻 IC 開發(fā)工具 TPA2028D1YZFEVM Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA2028D1YZFEVM | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
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