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| 型号： | TPA6045A4CRHB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC32 |
| 封装： | QFN-32 |
| 文件页数： | 15/30页 |
| 文件大小： | 1147K |
| 代理商： | TPA6045A4CRHB |
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C
O
C
O
V
OUT
V
OUT
GND
V
DD
V
DD
V
/2
DD
V
BIAS
Conventional
Capacitor-Less
GND
V
DD
V
SS
V
BIAS
DirectPath
TM
Input-Blocking Capacitors
C(DCINPUT-BLOCKING)
1
2
CIN =
(6)
SLOS614 – OCTOBER 2008.............................................................................................................................................................................................. www.ti.com
Figure 43. Amplifier Applications
DC input-blocking capacitors block the dc portion of the audio source and allow the inputs to properly bias.
Maximum performance is achieved when the inputs of the TPA6045A4C are properly biased. Performance
issues such as pop are optimized with proper input capacitors.
The dc input-blocking capacitors can be removed, provided the inputs are connected differentially and within the
input common-mode range of the amplifier, the audio signal does not exceed ±3 V, and pop performance is
sufficient.
CIN is a theoretical capacitor used for mathematical calculations only. Its value is the series combination of the dc
input-blocking capacitors, C(DCINPUT-BLOCKING). Use Equation 6 to determine the value of C(DCINPUT-BLOCKING). For
example, if CIN is equal to 0.22 F, then C(DCINPUT-BLOCKING) is equal to about 0.47 F.
The two C(DCINPUT-BLOCKING) capacitors form a high-pass filter with the input impedance of the TPA6045A4C. Use
Equation 6 to calculate CIN, then calculate the cutoff frequency using CIN and the differential input impedance of
the TPA6045A4C, RIN, using Equation 7. Note that the differential input impedance changes with gain. See
Figure 39 for input impedance values. The frequency and/or capacitance can be determined when one of the two
values are given.
22
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPA6045A4C
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| TPA6045A4CRHBR | 功能描述:音频放大器 2W Spkr Amp,Head phone Amp & LDO 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 |
| TPA6047A4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPatTM STEREO HEADPHONE DRIVE AND REGULATOR |
| TPA6047A4RHBR | 功能描述:音频放大器 2W Stereo Audio Pwr Amp 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 |
| TPA6047A4RHBRG4 | 功能描述:音频放大器 2W Stereo Audio Pwr Amp 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 |
| TPA6100A2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:50-mW Ultra-Low Voltage Audio Power Amp |
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