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| 型号： | TPA0233DGQ |
| 厂商： | Texas Instruments |
| 文件页数： | 7/26页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2W MONO 10MSOP |
| 标准包装： | 80 |
| 类型： | AB 类 |
| 输出类型： | 1-通道（单声道），带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 2W x 1 @ 4 欧姆; 92mW x 2 @ 32 欧姆 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 特点： | 消除爆音；关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 10-MSOP-PowerPad |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 配用： | 296-10813-ND - EVAL MOD AUDIO AMP FOR TPA0233 |
| 其它名称： | 296-34549-5 TPA0233DGQ-ND |
TPA0233
2W MONO AUDIO POWER AMPLIFIER
WITH HEADPHONE DRIVE
SLOS278D JANUARY 2000 REVISED NOVEMBER 2002
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
bridged-tied load versus single-ended mode (continued)
In a typical computer sound channel operating at 5 V, bridging raises the power into an 8-
speaker from a
singled-ended (SE, ground reference) limit of 250 mW to 1 W. In sound power, that is a 6-dB improvement—
which is loudness that can be heard. In addition to increased power, there are frequency response concerns.
Consider the single-supply SE configuration shown in Figure 25. A coupling capacitor is required to block the
dc offset voltage from reaching the load. These capacitors can be quite large (approximately 33
F to 1000 F)
so they tend to be expensive, heavy, occupy valuable PCB area, and have the additional drawback of limiting
low-frequency performance of the system. This frequency limiting effect is due to the high-pass filter network
created with the speaker impedance and the coupling capacitance and is calculated with equation 8.
fc +
1
2
pR
L
C
(C)
(8)
For example, a 68-
F capacitor with an 8- speaker would attenuate low frequencies below 293 Hz. The BTL
configuration cancels the dc offsets, which eliminates the need for the blocking capacitors. Low-frequency
performance is then limited only by the input network and speaker response. Cost and PCB space are also
minimized by eliminating the bulky coupling capacitor.
RL
C(C)
VO(PP)
VDD
3 dB
fc
Figure 25. Single-Ended Configuration and Frequency Response
Increasing power to the load does carry a penalty of increased internal power dissipation. The increased
dissipation is understandable considering that the BTL configuration produces 4
× the output power of the SE
configuration. Internal dissipation versus output power is discussed further in the crest factor and thermal
considerations section.
single-ended (stereo) operation
In SE (stereo) mode (see Figure 24 and Figure 25), the load is driven from the primary amplifier output for each
channel (LO and RO, terminals 6 and 10).
The amplifier switches to single-ended operation when the ST/MN terminal is held high.
input operation
The input allows stereo inputs to be applied to the amplifier. When the ST/MN terminal is held high, the inputs
(LIN and RIN) drive the outputs as LO and RO in stereo mode. When the ST/MN terminal is held low, the inputs
are surrounded internally to create the mono BTL signal, driving the outputs as MO+ and MO.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA0233DGQG4 | 功能描述:音频放大器 Mono Class-AB w/Ster Hdphn Drv Summed Inp 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 |
| TPA0233DGQR | 功能描述:音频放大器 Mono Class-AB w/Ster Hdphn Drv Summed Inp 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 |
| TPA0233DGQRG4 | 功能描述:音频放大器 Mono Class-AB w/Ster Hdphn Drv Summed Inp 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 |
| TPA0233EVM | 功能描述:音频 IC 开发工具 TPA0233 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TPA0233G | 制造商:ON Semiconductor 功能描述:THY T0220 SPECIAL SCR |
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