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| 型号： | TPA3005D2EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 8/31页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR TPA3005D2 |
| 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： | 6W x 2 @ 8 欧姆 |
| 电源电压： | 8.5 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | TPA3005D2 |
| 已供物品： | 板 |
| 产品目录页面： | 877 (CN2011-ZH PDF) |
| 相关产品： | TPA3005D2PHPRG4-ND - IC AMP AUDIO PWR 6W STER 48TQFP TPA3005D2PHPG4-ND - IC AMP AUDIO PWR 6W STER 48TQFP TPA3005D2PHP-ND - IC AMP AUDIO PWR 6W STER 48TQFP 296-17058-6-ND - IC AMP AUDIO PWR 6W STER 48TQFP 296-17058-1-ND - IC AMP AUDIO PWR 6W STER 48TQFP 296-17058-2-ND - IC AMP AUDIO PWR 6W STER 48TQFP |
| 其它名称： | 296-18924 |
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fc +
1
2 p Z
i
C
i
3 dB
fc
C
i +
1
2p Z
i fc
SLOS427A – MAY 2004 – REVISED AUGUST 2010
www.ti.com
INPUT CAPACITOR, CI
In the 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 impedance of the amplifier (Zi) form a
high-pass filter with the corner frequency determined in Equation 6.
(6)
The value of Ci is important, as it directly affects the bass (low frequency) performance of the circuit. Consider
the example where Zi is 137 k and the specification calls for a flat bass response down to 20 Hz. Equation 6 is
reconfigured as Equation 7.
(7)
In this example, Ci is 58 nF, so one would likely choose a value of 0.1 F as this value is commonly used. If the
gain is known and is constant, use Zi from Table 2 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 2.5 V, which is likely higher than the source dc level. Note that it is
important to confirm the capacitor polarity in the application.
For the best pop performance, CI should be less than or equal to 1F.
Power Supply Decoupling,CS
The TPA3005D2 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 VCC 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. The 10-F capacitor also serves as local storage capacitor for supplying
current during large signal transients on the amplifier outputs.
BSN and BSP Capacitors
The full H-bridge output stages use only NMOS transistors. Therefore, they require bootstrap capacitors for the
high side of each output to turn on correctly. A 220-nF ceramic capacitor, rated for at least 25 V, must be
connected from each output to its corresponding bootstrap input. Specifically, one 220-nF capacitor must be
connected from xOUTP to xBSP, and one 220-nF capacitor must be connected from xOUTN to xBSN. (See the
application circuit diagram in Figure 15).
The bootstrap capacitors connected between the BSxx pins and corresponding output function as a floating
power supply for the high-side N-channel power MOSFET gate drive circuitry. During each high-side switching
cycle, the bootstrap capacitors hold the gate-to-source voltage high enough to keep the high-side MOSFETs
turned on.
16
Copyright 2004–2010, Texas Instruments Incorporated
Product Folder Link(s): TPA3005D2
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相关代理商/技术参数 |
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| TPA3005D2PHP | 功能描述:音频放大器 Stereo Med Power 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 |
| TPA3005D2PHPG4 | 功能描述:音频放大器 Stereo Med Power 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 |
| TPA3005D2PHPR | 功能描述:音频放大器 Stereo Med Power 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 |
| TPA3005D2PHPRG4 | 功能描述:音频放大器 Stereo Med Power 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 |
| TPA3007D1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:6.5-W MONO CLASS-D AUDIO POWER AMPLIFIER |
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