參數(shù)資料
型號： TPA6130A2RTJTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQCC20
封裝： 4 X 4 MM, GREEN, PLASTIC, QFN-20
文件頁數(shù)： 4/28頁
文件大小： 1198K
代理商： TPA6130A2RTJTG4
www.ti.com
APPLICATION INFORMATION
20
19
18
17
16
6
7
8
9
10
1
2
3
4
5
11
12
13
14
15
VDD
GND
CPP
CPM
CPVSS
SD
SDA
SCL
GND
LEFTINM
LEFTINP
GND
RIGHTINP
RIGHTINM
CPVSS
HPLEFT
GND
VDD
HPRIGHT
VDD
1
F
m
1
F
m
SCL
SDA
SD
0.47
F
m
0.47
F
m
0.47
F
m
0.47
F
m
1
F
m
1
F
m
VDD
TPA6130A2
Headphone Amplifiers
fc +
1
2pR
LCO
(1)
C
O +
1
2pR
Lfc
(2)
SLOS488B – NOVEMBER 2006 – REVISED FEBRUARY 2008
SIMPLIFIED APPLICATIONS CIRCUIT
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 36 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 (RL), the capacitor (CO), and the cutoff frequency (fC).
CO can be determined using Equation 2, where the load impedance and the cutoff frequency are known.
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
12
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TPA6130A2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA6130A2YZH 制造商:TI 制造商全稱:Texas Instruments 功能描述:138-mW DIRECTPATH STEREO HEADPHONE AMPLIFIER WITH I2C VOLUME CONTROL
TPA6130A2YZHR 功能描述:音頻放大器 138-mW DirectPath Stereo Headphone Amp 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
TPA6130A2YZHT 功能描述:音頻放大器 138-mW DirectPath Stereo Headphone Amp 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
TPA6132A2 制造商:TI 制造商全稱:Texas Instruments 功能描述:25-mW DIRECTPATH? STEREO HEADPHONE AMPLIFIER WITH POP SUPPRESSION
TPA6132A2EVM2 功能描述:音頻 IC 開發(fā)工具 TPA6132A2EVM2 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
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