- 您现在的位置：买卖IC网 > PDF目录98269 > TPA2001D1GQCR (TEXAS INSTRUMENTS INC) 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA48 PDF资料下载
参数资料
| 型号： | TPA2001D1GQCR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA48 |
| 封装： | 4 X 4 MM, MICRO, PLASTIC, BGA-48 |
| 文件页数： | 14/14页 |
| 文件大小： | 201K |
| 代理商： | TPA2001D1GQCR |
TPA2001D1
1-W FILTERLESS MONO CLASS-D AUDIO POWER AMPLIFIER
SLOS338B – SEPTEMBER 2000 – REVISED AUGUST 2002
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
input capacitor, Ci (continued)
The value of Ci is important, as it directly affects the bass (low frequency) performance of the circuit. Consider
the example where ZI is 20 k and the specification calls for a flat bass response down to 80 Hz. Equation 5
is reconfigured as equation 6.
C
i +
1
2
pZ
I fc
(6)
In this example, Ci is 0.1 F, so one would likely choose a value in the range of 0.1 F to 1 F. If the gain is known
and will be constant, use ZI from Table 1 to calculate Ci. A further consideration for this capacitor is the leakage
path from the input source through the input network (Ci) and the feedback network to the load. This leakage
current creates a dc offset voltage at the input to the amplifier that reduces useful headroom, especially in high
gain applications. For this reason a low-leakage tantalum or ceramic capacitor is the best choice. When
polarized capacitors are used, the positive side of the capacitor should face the amplifier input in most
applications as the dc level there is held at VDD/2, which is likely higher than the source dc level. Note that it
is important to confirm the capacitor polarity in the application.
Ci must be 10 times smaller than the bypass capacitor to reduce clicking and popping noise from power on/off
and entering and leaving shutdown. After sizing Ci for a given cutoff frequency, size the bypass capacitor to 10
times that of the input capacitor.
(7)
Ci ≤ CBYP / 10
power supply decoupling, CS
The TPA2001D1 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling
to ensure the output total harmonic distortion (THD) is as low as possible. Power supply decoupling also
prevents oscillations for long lead lengths between the amplifier and the speaker. The optimum decoupling is
achieved by using two capacitors of different types that target different types of noise on the power supply leads.
For higher frequency transients, spikes, or digital hash on the line, a good low equivalent-series-resistance
(ESR) ceramic capacitor, typically 0.1
F placed as close as possible to the device VDD lead works best. For
filtering lower-frequency noise signals, a larger aluminum electrolytic capacitor of 10
F or greater placed near
the audio power amplifier is recommended.
midrail bypass capacitor, C(BYP)
The midrail bypass capacitor (C(BYP)) is the most critical capacitor and serves several important functions.
During start-up or recovery from shutdown mode, C(BYP) determines the rate at which the amplifier starts up.
The second function is to reduce noise produced by the power supply caused by coupling into the output drive
signal. This noise is from the midrail generation circuit internal to the amplifier, which appears as degraded
PSRR and THD+N.
Bypass capacitor (C(BYP)) values of 0.47-F to 1-F ceramic or tantalum low-ESR capacitors are recommended
for the best THD and noise performance.
Increasing the bypass capacitor reduces clicking and popping noise from power on/off and entering and leaving
shutdown. To have minimal pop, C(BYP) should be 10 times larger than Ci.
(8)
C(BYP) ≥ 10 × Ci
相关PDF资料 |
PDF描述 |
|---|---|
| TPA2001D1GQC | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA48 |
| TPA2001D1PWRG4 | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| TPA2001D1PWG4 | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| TPA2001D2PWPR | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| TPA2001D2PWP | 1 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA2001D1PW | 功能描述:音频放大器 1W Class-D 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 |
| TPA2001D1PW | 制造商:Texas Instruments 功能描述:AUDIO POWER AMP CLASS-D 16TSSOP 制造商:Texas Instruments 功能描述:AUDIO POWER AMP, CLASS-D, 16TSSOP |
| TPA2001D1PW | 制造商:Texas Instruments 功能描述:AUDIO POWER AMPLIFIER IC ((NW)) |
| TPA2001D1PWG4 | 功能描述:音频放大器 Mono Filter-Free Class-D 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 |
| TPA2001D1PWR | 功能描述:音频放大器 Mono Filter-Free Class-D 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 |
发布紧急采购，3分钟左右您将得到回复。