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參數(shù)資料
| 型號： | TAS5716PAP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封裝： | 10 X 10 MM, GREEN, PLASTIC, HTQFP-64 |
| 文件頁數(shù)： | 32/64頁 |
| 文件大?。?/td> | 1398K |
| 代理商： | TAS5716PAP |
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Calculation of Output Signal Level of TAS5716 Feedback Power Stage
I
2C SERIAL-CONTROL COMMAND CHARACTERISTICS
SLOS569 – JANUARY 2009............................................................................................................................................................................................... www.ti.com
(Gain Is Independent of PVCC)
The gain of the TAS5716 is the total digital gain of the controller multiplied by the gain of the power stage.
For a half-bridge channel of the TAS5716 power stage, the gain is simply:
Power stage gain = 13 × VRMS / modulation level
Modulation level = fraction of full-scale modulation of the PWM signal at the input of the power stage
VRMS = Audio voltage level at the output of the power stage = 13 × modulation level
For the TAS5716 controller, the gain is the programmed digital gain multiplied by a scaling factor, called the
maximum modulation level. The maximum modulation level is derived from the modulation limit programmed in
the controller, which limits duty cycle to a set number of percent above 0% and below 100%. Setting the
modulation limit to 97.7% (default) limits the duty cycle between 2.3% and 97.7%.
Controller gain = digital gain × maximum modulation level × (modulation level/digital FFS)
Digital FFS = digital input fraction of full scale
Modulation limit = 97.7%
Maximum modulation level = 2 × modulation limit – 1 = 0.954
The output signal level of the TAS5716 can now be calculated.
VRMS = digital FFS × digital gain × maximum modulation level × 13
With the modulation limit set at the default level of 97.7%, this becomes:
VRMS
(Single-ended)
VRMS = digital FFS × digital gain × 24.8
(BTL)
Example: Input = –20 dbFS; volume = 0 dB; biquads = ALL PASS; modulation index = 97.7%; mode = BTL
Output VRMS = 24.8 × 0.1 × 1 = 2.48 V
The DAP has two groups of I2C commands. One set is commands that are designed specifically to be operated
while audio is streaming and that have built-in mechanisms to prevent noise, clicks, and pops. The other set
does not have this built-in protection.
Commands that are designed to be adjusted while audio is streaming:
Master volume
Master mute
Individual channel volume
Individual channel mute
Commands that are normally issued as part of initialization:
Serial-data interface format
De-emphasis
Sample-rate conversion
Input multiplexer
Output multiplexer
Biquads
Channel-6 multiplexer-2
Channel delay
Enable/disable dc blocking
Hard/soft unmute from clock error
Enable/disable headphone outputs
Start-up sequence for correct device operation
This sequence must be followed to ensure proper operation.
38
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TAS5716
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS5716PAPR | 功能描述:音頻放大器 20W St Closed-loop I2S Audio 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 |
| TAS5717 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W/15-W Digital Audio Power Amplifier with Integrated Cap-Free HP Amplifier |
| TAS5717EVM | 功能描述:音頻 IC 開發(fā)工具 TAS5717EVM 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 |
| TAS5717LPHPR | 制造商:Texas Instruments 功能描述:I2S INPUT CLASS D AMPLIFIER |
| TAS5717PHP | 功能描述:音頻放大器 Dig In stereo 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 |
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