- 您现在的位置：买卖IC网 > PDF目录98277 > TPA731DGNR (TEXAS INSTRUMENTS INC) 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 PDF资料下载
参数资料
| 型号： | TPA731DGNR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | GREEN, PLASTIC, MSOP-8 |
| 文件页数： | 5/28页 |
| 文件大小： | 792K |
| 代理商： | TPA731DGNR |
第1页第2页第3页第4页当前第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页第24页第25页第26页第27页第28页
TPA731
700mW MONO LOW VOLTAGE AUDIO POWER AMPLIFIER
WITH DIFFERENTIAL INPUTS
SLOS315B JUNE 2000 REVISED OCTOBER 2002
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
bridged-tied load (continued)
For example, a 68-
F capacitor with an 8- speaker would attenuate low frequencies below 293 Hz. The BTL
configuration cancels the dc offsets, which eliminates the need for the blocking capacitors. Low-frequency
performance is then limited only by the input network and speaker response. Cost and PCB space are also
minimized by eliminating the bulky coupling capacitor.
RL
CC
VO(PP)
VDD
3 dB
fc
Figure 24. Single-Ended Configuration and Frequency Response
Increasing power to the load does carry a penalty of increased internal power dissipation. The increased
dissipation is understandable considering that the BTL configuration produces 4
× the output power of a SE
configuration. Internal dissipation versus output power is discussed further in the thermal considerations
section.
BTL amplifier efficiency
The primary cause of linear amplifiers inefficiencies is voltage drop across the output stage transistors. There
are two components of the internal voltage drop. One is the headroom or dc voltage drop that varies inversely
to output power. The second component is due to the sinewave nature of the output. The total voltage drop can
be calculated by subtracting the RMS value of the output voltage from VDD. The internal voltage drop multiplied
by the RMS value of the supply current, IDDrms, determines the internal power dissipation of the amplifier.
An easy-to-use equation to calculate efficiency starts out being equal to the ratio of power from the power supply
to the power delivered to the load. To accurately calculate the RMS values of power in the load and in the
amplifier, the current and voltage waveform shapes must first be understood (see Figure 25).
V(LRMS)
VO
IDD
IDD(RMS)
Figure 25. Voltage and Current Waveforms for BTL Amplifiers
相关PDF资料 |
PDF描述 |
|---|---|
| TPA731DGN | 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA731DR | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA731D | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA731DG4 | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA731DRG4 | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA731DGNRG4 | 功能描述:音频放大器 Mono Diff Input Class-AB 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 |
| TPA731DR | 功能描述:音频放大器 Mono Diff Input Class-AB 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 |
| TPA731DRG4 | 功能描述:音频放大器 Mono Diff Input Class-AB 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 |
| TPA731EVM | 功能描述:音频 IC 开发工具 TPA731 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 |
| TPA741 | 制造商:TI 制造商全称:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS |
发布紧急采购，3分钟左右您将得到回复。