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參數資料
| 型號： | TPA2034D1YZFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.75 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| 封裝： | LEAD FREE, BGA-9 |
| 文件頁數： | 2/19頁 |
| 文件大小： | 1016K |
| 代理商： | TPA2034D1YZFT |
www.ti.com
APPLICATION INFORMATION
FULLY DIFFERENTIAL AMPLIFIER
Advantages of Fully Differential Amplifiers
COMPONENT SELECTION
Decoupling Capacitor (CS)
Input Capacitors (CI)
fc +
1
2p R
I
C
I
(1)
SLOS476 – JUNE 2006
The TPA2032D1 is a fully differential amplifier with differential inputs and outputs. The fully differential amplifier
consists of a differential amplifier and a common-mode amplifier. The differential amplifier ensures that the
amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. The
common-mode feedback ensures that the common-mode voltage at the output is biased around VDD/2
regardless of the common-mode voltage at the input. The fully differential TPA2032D1 can still be used with a
single-ended input; however, the TPA2032D1 should be used with differential inputs when in a noisy
environment, like a wireless handset, to ensure maximum noise rejection.
Input-coupling capacitors not required:
– The fully differential amplifier allows the inputs to be biased at voltage other than mid-supply. The inputs of
the TPA2032D1 can be biased anywhere within the common mode input voltage range listed in the
Recommended Operating Conditions table. If the inputs are biased outside of that range, input-coupling
capacitors are required.
Midsupply bypass capacitor, C(BYPASS), not required:
– The fully differential amplifier does not require a bypass capacitor. Any shift in the midsupply affects both
positive and negative channels equally and cancels at the differential output.
Better RF-immunity:
– GSM handsets save power by turning on and shutting off the RF transmitter at a rate of 217 Hz. The
transmitted signal is picked-up on input and output traces. The fully differential amplifier cancels the signal
better than the typical audio amplifier.
TPA2032D1 with differential inputs and input capacitors. Figure 37 shows the TPA2032D1 with a single-ended
input.
The TPA2032D1 is a high-performance class-D audio amplifier that requires adequate power supply decoupling
to ensure the efficiency is high and total harmonic distortion (THD) is low. For higher frequency transients,
spikes, or digital hash on the line, a good low equivalent-series-resistance (ESR) ceramic capacitor, typically
1
F, placed as close as possible to the device V
DD lead works best. Placing this decoupling capacitor close to
the TPA2032D1 is very important for the efficiency of the class-D amplifier, because any resistance or
inductance in the trace between the device and the capacitor can cause a loss in efficiency. For filtering
lower-frequency noise signals, a 10
F or greater capacitor placed near the audio power amplifier would also
help, but it is not required in most applications because of the high PSRR of this device. Typically, the smaller
the capacitor's case size, the lower the inductance and the closer it can be placed to the TPA2032D1.
The TPA2032D1 does not require input coupling capacitors if the design uses a differential source that is biased
within the common-mode input voltage range. That voltage range is listed in the Recommended Operating
Conditions table. If the input signal is not biased within the recommended common-mode input range, such as in
needing to use the input as a high pass filter, shown in Figure 36, or if using a single-ended source, shown in
Figure 37, input coupling capacitors are required. The same value capacitors should be used on both IN+ and
IN– for best pop performance.
The value of the input capacitor is important to consider as it directly affects the bass (low frequency)
performance of the circuit. Speaker response may also be taken into consideration when setting the corner
frequency using input capacitors.
10
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA2035D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.75-W FIXED GAIN MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
| TPA2035D1EVM | 功能描述:音頻 IC 開發工具 TPA2035D1EVM Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA2035D1YZFR | 功能描述:音頻放大器 2.75W Fix Gain Mono Class-D Aud Pwr Amp RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2035D1YZFT | 功能描述:音頻放大器 2.75W Fix Gain Mono Class-D Aud Pwr Amp RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2036D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.5-W MONO CLASS-D AUDIO AMPLIFIER WITH AUTO-RECOVERY |
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