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| 型号： | TPA2008D2EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 9/26页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR TPA2008D2 |
| 标准包装： | 1 |
| 放大器类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 3W x 2 @ 3 欧姆 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | TPA2008D2 |
| 已供物品： | 板 |
| 产品目录页面： | 876 (CN2011-ZH PDF) |
| 相关产品： | TPA2008D2PWPRG4-ND - IC AMP AUDIO PWR 3W STER 24TSSOP TPA2008D2PWPG4-ND - IC AMP AUDIO PWR 3W STER 24TSSOP 296-17158-6-ND - IC AMP AUDIO PWR 3W STER 24TSSOP 296-17158-1-ND - IC AMP AUDIO PWR 3W STER 24TSSOP 296-17158-2-ND - IC AMP AUDIO PWR 3W STER 24TSSOP 296-15339-5-ND - IC AMP AUDIO PWR 3W STER 24TSSOP |
| 其它名称： | 296-18922 |
www.ti.com
SELECTION OF COSC AND ROSC
fOSC = 6.6 / (ROSC x COSC)
(5)
INPUT RESISTANCE
Ci
IN
Ri
Rf
Input
Signal
f
*3 dB
+
1
2p C
i
R
i
(6)
INPUT CAPACITOR, Ci
3 dB
fc
fc +
1
2p R
i
C
i
(7)
C
i +
1
2p R
i
fc
(8)
TPA2008D2
SLOS413C – JULY 2003 – REVISED MAY 2004
APPLICATION INFORMATION (continued)
The switching frequency is determined using the values of the components connected to ROSC (pin 11) and
COSC (pin 10) and may be calculated with the following equation:
The frequency may be varied from 200 kHz to 300 kHz by adjusting the values chosen for ROSC and COSC. The
recommended values are COSC = 220 pF, ROSC= 120 k for a switching frequency of 250 kHz.
Each gain setting is achieved by varying the input resistance of the amplifier, which can range from its smallest
value to over five times that value. As a result, if a single capacitor is used in the input high-pass filter, the -3 dB
or cutoff frequency also changes by over five times.
The -3-dB frequency can be calculated using equation Equation 6. See Figure 12. Note that due to process
variation, the input resistance, Ri, can change by up to 20%.
In a typical application, an input capacitor (Ci) is required to allow the amplifier to bias the input signal to the
proper dc level for optimum operation. In this case, Ci and the input resistance of the amplifier (Ri) form a
high-pass filter with the corner frequency determined in equation Equation 7.
The value of Ci is important, as it directly affects the bass (low frequency) performance of the circuit. Consider
the example where Ri is 50 k and the specification calls for a flat bass response down to 30 Hz. Equation
Equation 5 is reconfigured as equation Equation 8.
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. Figure 12 can be
used to determine the input impedance for a given gain and can serve to aid in the calculation of Ci.
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA2008D2PWP | 功能描述:音频放大器 Stereo Hi-Pwr 5-V 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 |
| TPA2008D2PWPG4 | 功能描述:音频放大器 Stereo Hi-Pwr 5-V 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 |
| TPA2008D2PWPR | 功能描述:音频放大器 Stereo Hi-Pwr 5-V 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 |
| TPA2008D2PWPRG4 | 功能描述:音频放大器 Stereo Hi-Pwr 5-V 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 |
| TPA200RL | 功能描述:TVS 二极管 - 瞬态电压抑制器 200V 50uA Bidirect RoHS:否 制造商:Vishay Semiconductors 极性:Bidirectional 工作电压: 击穿电压:58.9 V 钳位电压:77.4 V 峰值浪涌电流:38.8 A 系列: 封装 / 箱体:DO-214AB 最小工作温度:- 55 C 最大工作温度:+ 150 C |
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