- 您現在的位置：買賣IC網 > PDF目錄98273 > TPA3125D2N (TEXAS INSTRUMENTS INC) 36 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP20 PDF資料下載
參數資料
| 型號： | TPA3125D2N |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 36 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-20 |
| 文件頁數： | 13/26頁 |
| 文件大小： | 467K |
| 代理商： | TPA3125D2N |
BASIC MEASUREMENT SYSTEM
SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com
This section focuses on methods that use the basic equipment listed below:
Audio analyzer or spectrum analyzer
Digital multi-meter (DMM)
Oscilloscope
Twisted-pair wires
Signal generator
Power resistor(s)
Linear regulated power supply
Filter components
EVM or other complete audio circuit
Figure 31 shows the block diagrams of basic measurement systems for class-AB and class-D amplifiers. A sine
wave is normally used as the input signal because it consists of the fundamental frequency only (no other
harmonics are present). An analyzer is then connected to the audio power amplifier (APA) output to measure the
voltage output. The analyzer must be capable of measuring the entire audio bandwidth. A regulated dc power
supply is used to reduce the noise and distortion injected into the APA through the power pins. A System Two
audio measurement system (AP-II) by Audio Precision includes the signal generator and analyzer in one
package.
The generator output and amplifier input must be ac-coupled. However, the EVMs already have the ac-coupling
capacitors, so no additional coupling is required. The generator output impedance should be low to avoid
attenuating the test signal, and is important because the input resistance of APAs is not high. Conversely, the
analyzer input impedance should be high. The output resistance, ROUT, of the APA is normally in the hundreds of
milliohms and can be ignored for all but the power-related calculations.
Figure 31(a) shows a class-AB amplifier system. It takes an analog signal input and produces an analog signal
output. This amplifier circuit can be directly connected to the AP-II or other analyzer input.
This is not true of the class-D amplifier system shown in Figure 31(b), which requires low-pass filters in most
cases in order to measure the audio output waveforms. This is because it takes an analog input signal and
converts it into a pulse-width modulated (PWM) output signal that is not accurately processed by some
analyzers.
20
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPA3125D2
相關PDF資料 |
PDF描述 |
|---|---|
| TPA3200D1DCP | 12.8 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TPA3200D1DCPR | 12.8 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TPA3200D1DCPRG4 | 12.8 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TPA3200D1DCPG4 | 12.8 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TPA321DGNR | 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3128D2DAP | 功能描述:IC AUDIO AMP CLASS D 32HTSSOP 制造商:texas instruments 系列:- 包裝:管件 零件狀態(tài):在售 類型:D 類 輸出類型:2 通道（立體聲） 不同負載時的最大輸出功率 x 通道數:30W x 2 @ 8 歐姆 電壓 - 電源:4.5 V ~ 26 V 特性:短路保護 安裝類型:表面貼裝 工作溫度:-40°C ~ 85°C（TA） 供應商器件封裝:32-HTSSOP 封裝/外殼:32-TSSOP（0.240"，6.10mm 寬）裸露焊盤 標準包裝:46 |
| TPA3128D2DAPR | 功能描述:IC AUDIO AMP CLASS D 32-HTSSOP 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:D 類 輸出類型:2 通道（立體聲） 不同負載時的最大輸出功率 x 通道數:30W x 2 @ 8 歐姆 電壓 - 電源:4.5 V ~ 26 V 特性:短路保護 安裝類型:表面貼裝 工作溫度:-40°C ~ 85°C（TA） 供應商器件封裝:32-HTSSOP 封裝/外殼:32-TSSOP（0.240"，6.10mm 寬）裸露焊盤 標準包裝:1 |
| TPA3128D2EVM | 功能描述:TPA3128D2EVM 制造商:texas instruments 系列:* 零件狀態(tài):在售 標準包裝:1 |
| TPA3129D2DAP | 功能描述:IC AUDIO AMP CLASS D 32HTSSOP 制造商:texas instruments 系列:- 包裝:管件 零件狀態(tài):在售 類型:D 類 輸出類型:2 通道（立體聲） 不同負載時的最大輸出功率 x 通道數:30W x 2 @ 8 歐姆 電壓 - 電源:4.5 V ~ 26 V 特性:短路和熱保護 安裝類型:表面貼裝 工作溫度:-40°C ~ 85°C 供應商器件封裝:32-HTSSOP 封裝/外殼:32-TSSOP（0.240"，6.10mm 寬） 標準包裝:46 |
| TPA3130D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:15W,30W,50W Filter-Free Class-D Stereo Amplifier Family with AM Avoidance |
發(fā)布緊急采購，3分鐘左右您將得到回復。