參數(shù)資料
型號(hào)： TPA6030A4
英文描述： 3-W Stereo Audio Power Amplifier with Advanced DC Volume Control
中文描述： 3 - W立體聲音頻功率放大器與先進(jìn)的直流音量控制
文件頁(yè)數(shù)： 27/33頁(yè)
文件大?。?/td> 469K
代理商： TPA6030A4
TPA6011A4
SLOS392
–
FEBRUARY 2002
27
www.ti.com
APPLICATION INFORMATION
bridged-tied load versus single-ended lode (continued)
For example, a 68-
μ
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
C(C)
VO(PP)
VO(PP)
VDD
–
3 dB
fc
Figure 36. 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 the SE
configuration. Internal dissipation versus output power is discussed further in the
crest factor and thermal
considerations
section.
single-ended operation
In SE mode (see Figure 36), the load is driven from the primary amplifier output for each channel (OUT+).
The amplifier switches single-ended operation when the SE/BTL terminal is held high. This puts the negative
outputs in a high-impedance state, and effectively reduces the amplifier
’
s gain by 6 dB.
BTL amplifier efficiency
Class-AB amplifiers are inefficient. The primary cause of these 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 V
DD
. The
internal voltage drop multiplied by the RMS value of the supply current (I
DD
rms) 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 power
supply to the power delivered to the load. To accurately calculate the RMS and average values of power in the
load and in the amplifier, the current and voltage waveform shapes must first be understood (see Figure 37).
相關(guān)PDF資料
PDF描述
TPA6030A4PWP Slide
TPA6100A2 50-mW Ultra-Low Voltage Audio Power Amp
TPA6110A2DGNR Switchlocks
TPA6111A2DGNR Rotary Keylock Switch; Key Removal Position:1; Circuitry:SPST; Indexing:90; Contact Current Max:4A; Contact Rating:4A; Leaded Process Compatible:Yes; Mounting Type:Solder Lug; No. of Switch Positions:1; Number of Positions:1
TPA6111A2DR Rotary Keylock Switch; Key Removal Position:1, 2; Circuitry:SPST; Indexing:90; Contact Current Max:4A; Contact Rating:4A; Leaded Process Compatible:Yes; Mounting Type:Solder Lug; No. of Switch Positions:2; Number of Positions:2
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA6030A4_07 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-2 STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
TPA6030A4EVM 功能描述:音頻 IC 開(kāi)發(fā)工具 TPA6030A4 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
TPA6030A4PWP 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB 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
TPA6030A4PWPG4 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB 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
TPA6030A4PWPR 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB 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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