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參數資料
| 型號： | TPA2010D1YZFR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封裝： | 1.45 X 1.45 MM, GREEN, DSBGA-9 |
| 文件頁數： | 2/25頁 |
| 文件大小： | 783K |
| 代理商： | TPA2010D1YZFR |
www.ti.com
Decoupling Capacitor (CS)
Input Capacitors (CI)
fc +
1
2p R
I
C
I
(2)
C
I +
1
2p R
I
fc
(3)
_
+
IN-
IN+
PWM
H-
Bridge
VO+
VO-
Internal
Oscillator
CS
To Battery
VDD
GND
Bias
Circuitry
RI
+
-
Differential
Input
TPA2010D1
Filter-Free Class D
SHUTDOWN
SLOS417C – OCTOBER 2003 – REVISED SEPTEMBER 2007
The TPA2010D1 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
μF, placed as close as possible to the device VDD lead works best. Placing this decoupling capacitor close to the
TPA2010D1 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
μF 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.
The TPA2010D1 does not require input coupling capacitors if the design uses a differential source that is biased
from 0.5 V to VDD –0.8 V (shown in Figure 27). If the input signal is not biased within the recommended
common-mode input range, if needing to use the input as a high pass filter (shown in Figure 28), or if using a
single-ended source (shown in Figure 29), input coupling capacitors are required.
The input capacitors and input resistors form a high-pass filter with the corner frequency, fc, determined in
The value of the input capacitor is important to consider as it directly affects the bass (low frequency)
performance of the circuit. Speakers in wireless phones cannot usually respond well to low frequencies, so the
corner frequency can be set to block low frequencies in this application.
Equation 3 is reconfigured to solve for the input coupling capacitance.
If the corner frequency is within the audio band, the capacitors should have a tolerance of 10% or better,
because any mismatch in capacitance causes an impedance mismatch at the corner frequency and below.
For a flat low-frequency response, use large input coupling capacitors (1
μF). However, in a GSM phone the
ground signal is fluctuating at 217 Hz, but the signal from the codec does not have the same 217 Hz fluctuation.
The difference between the two signals is amplified, sent to the speaker, and heard as a 217 Hz hum.
Figure 27. Typical TPA2010D1 Application Schematic With Differential Input for a Wireless Phone
10
Copyright 2003–2007, Texas Instruments Incorporated
Product Folder Link(s): TPA2010D1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA2010D1YZFRG4 | 制造商:TI 功能描述:AUDIO POWER AMPLIFIER |
| TPA2010D1YZFT | 功能描述:音頻放大器 Mono Filter-Free Class-D in WCSP 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 |
| TPA2011D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Filter-Free Class-D Audio Power Amplifier With Auto-Recovering Short-Circuit Protection |
| TPA2011D1_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Filter-Free Class-D Audio Power Amplifier |
| TPA2011D1YFFEVM | 功能描述:音頻 IC 開發工具 TPA2011D1YFF 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 |
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