- 您现在的位置：买卖IC网 > PDF目录98165 > TAS5708PHP (TEXAS INSTRUMENTS INC) 20.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 PDF资料下载
参数资料
| 型号： | TAS5708PHP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 20.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| 封装： | 7 X 7 MM, GREEN, PLASTIC, HTQFP-48 |
| 文件页数： | 24/56页 |
| 文件大小： | 1104K |
| 代理商： | TAS5708PHP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页当前第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页
APPLICATION INFORMATION
Calculation of Output Signal Level of TAS5708 Feedback Power Stage
SLOS570 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com
(Gain Is independent of PVCC)
The gain of the TAS5708 is the total digital gain of the controller multiplied by the gain of the power stage.
For a half-bridge channel of the TAS5708 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(SE) = Audio voltage level at the output of the power stage = 13 × Modulation Level
VRMS(BTL) = 2 × Audio voltage level at the output of the power stage = 26 × Modulation Level
For the TAS5708 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 TAS5708 can now be calculated:
VRMS(SE) = digital FFS × digital gain × maximum modulation level × 13
VRMS(BTL) = 2 × VRMS(SE)
With the modulation limit set at the default level of 97.7%, this becomes:
VRMS (BTL) = digital FFS × digital gain × 24.8
Example: Input = –20 dbFS; volume = 0 dB; biquads = ALL PASS; modulation index = 97.7%; mode = BTL
Output VRMS (BTL) = 24.8 × 0.1 × 1 = 2.48 V.
30
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TAS5708
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5708PHPR | 20.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| TAS5709AGPHPR | 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| TAS5709AGPHP | 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| TAS5709APHPR | 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| TAS5709APHP | 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5708PHPR | 功能描述:音频放大器 20W St Closed-Loop I2S In Aud Pwr Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TAS5709 | 制造商:TI 制造商全称:Texas Instruments 功能描述:20-W STEREO DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC |
| TAS5709APHP | 功能描述:音频放大器 20W Stereo I2S Aud Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TAS5709APHPR | 功能描述:音频放大器 20W Stereo I2S Aud Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TAS5709EVM | 功能描述:音频 IC 开发工具 TAS5709EVM Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
发布紧急采购，3分钟左右您将得到回复。