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| 型号： | TPA6211A1DRBG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.45 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-8 |
| 文件页数： | 10/32页 |
| 文件大小： | 916K |
| 代理商： | TPA6211A1DRBG4 |
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V(LRMS)
VO
IDD
IDD(avg)
RL
CC
VO(PP)
VDD
-3 dB
fc
FULLY DIFFERENTIAL AMPLIFIER
SLOS367C – AUGUST 2003 – REVISED JUNE 2008........................................................................................................................................................ www.ti.com
eliminates the need for the blocking capacitors.
power supply to the power delivered to the load. To
Low-frequency performance is then limited only by
accurately calculate the RMS and average values of
the input network and speaker response. Cost and
power in the load and in the amplifier, the current and
PCB space are also minimized by eliminating the
voltage waveform shapes must first be understood
bulky coupling capacitor.
(see Figure 35).
Figure 35. Voltage and Current Waveforms for
BTL Amplifiers
Although the voltages and currents for SE and BTL
are sinusoidal in the load, currents from the supply
Figure 34. Single-Ended Output and Frequency
are different between SE and BTL configurations. In
Response
an
SE
application
the
current
waveform
is
a
half-wave rectified shape, whereas in BTL it is a
Increasing power to the load does carry a penalty of
full-wave
rectified
waveform.
This
means
RMS
increased internal power dissipation. The increased
conversion factors are different. Keep in mind that for
dissipation is understandable considering that the
most of the waveform both the push and pull
BTL configuration produces 4
the output power of the
transistors are not on at the same time, which
SE configuration.
supports the fact that each amplifier in the BTL
device only draws current from the supply for half the
waveform. The following equations are the basis for
EFFICIENCY AND THERMAL INFORMATION
calculating amplifier efficiency.
Class-AB amplifiers are inefficient, primarily because
of voltage drop across the output-stage transistors.
The two components of this internal voltage drop are
the headroom or dc voltage drop that varies inversely
to output power, and 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
average
value
of
the
supply
current,
IDD(avg),
determines the internal power dissipation of the
amplifier.
An easy-to-use equation to calculate efficiency starts
out as being equal to the ratio of power from the
18
Copyright 2003–2008, Texas Instruments Incorporated
Product Folder Link(s): TPA6211A1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA6211A1DRBR | 功能描述:音频放大器 Mono Fully Diff 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 |
| TPA6211A1DRBR | 制造商:Texas Instruments 功能描述:IC AUDIO PWR AMP CLASS AB 3.1W |
| TPA6211A1DRBRG4 | 功能描述:音频放大器 Mono Fully Diff 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 |
| TPA6211A1EVM | 功能描述:音频 IC 开发工具 TPA6211A1 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 |
| TPA6211A1-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3.1-W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
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