- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98274 > TPA4411RTJ (TEXAS INSTRUMENTS INC) 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPA4411RTJ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
| 封裝： | 4 X 4 MM, PLASTIC, TQFN-20 |
| 文件頁數(shù)： | 7/30頁 |
| 文件大?。?/td> | 1264K |
| 代理商： | TPA4411RTJ |
第1頁第2頁第3頁第4頁第5頁第6頁當(dāng)前第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
www.ti.com
APPLICATION INFORMATION
Headphone Amplifiers
f
=
c
1
2 R C
p
L
O
(1)
C
=
O
1
2 R f
p
L
c
(2)
SLOS430E – AUGUST 2004 – REVISED MARCH 2008
Single-supply headphone amplifiers typically require dc-blocking capacitors. The capacitors are required because
most headphone amplifiers have a dc bias on the outputs pin. If the dc bias is not removed, the output signal is
severely clipped, and large amounts of dc current rush through the headphones, potentially damaging them. The
top drawing in Figure 64 illustrates the conventional headphone amplifier connection to the headphone jack and
output signal.
DC blocking capacitors are often large in value. The headphone speakers (typical resistive values of 16
or 32
) combine with the dc blocking capacitors to form a high-pass filter. Equation 1 shows the relationship between
the load impedance L), the capacitor O), and the cutoff frequency (fC).
If fC is low, the capacitor must then have a large value because the load resistance is small. Large capacitance
values require large package sizes. Large package sizes consume PCB area, stand high above the PCB,
increase cost of assembly, and can reduce the fidelity of the audio output signal.
Two different headphone amplifier applications are available that allow for the removal of the output dc blocking
capacitors. The Capless amplifier architecture is implemented in the same manner as the conventional amplifier
with the exception of the headphone jack shield pin. This amplifier provides a reference voltage, which is
connected to the headphone jack shield pin. This is the voltage on which the audio output signals are centered.
This voltage reference is half of the amplifier power supply to allow symmetrical swing of the output voltages. Do
not connect the shield to any GND reference or large currents will result. The scenario can happen if, for
example, an accessory other than a floating GND headphone is plugged into the headphone connector. See the
second block diagram and waveform in Figure 64.
Copyright 2004–2008, Texas Instruments Incorporated
15
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA4860DR | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| TPA4860D | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| TPA4860DG4 | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| TPA4860DRG4 | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| TPA4860Y | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA4411RTJR | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone Driver 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 |
| TPA4411RTJRG4 | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone Driver 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 |
| TPA4411RTJT | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone Driver 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 |
| TPA4411RTJTG4 | 功能描述:音頻放大器 80mW Cap-free Stereo Headphone Driver 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 |
| TPA4411YZH | 制造商:TI 制造商全稱:Texas Instruments 功能描述:80-mW CAPLESS STEREO HEADPHONE DRIVER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。