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| 型号： | TPA6030A4PWP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封装： | GREEN, PLASTIC, TSSOP-28 |
| 文件页数： | 6/32页 |
| 文件大小： | 698K |
| 代理商： | TPA6030A4PWP |
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TPA6030A4
SLOS395B DECEMBER 2002 REVISED JANUARY 2005
www.ti.com
14
SHUTDOWN
The shutdown function of the TPA6030A4 is designed to bring all the outputs and the BYPASS pin to dc ground. The output
transistors are turned off, and the current consumption of the device drops to less than 3 A.
In order for the part to go into shutdown, the SHUTDOWN pin must be held at a logic low (0.8 V to 0 V). Once the
SHUTDOWN pin is held at a logic low, the volume must ramp down to mute. The device goes through each volume step
until the output is muted. That is why it takes longer for the device to shut down at higher volume levels (see Figures 17,
18, and 21). The device has to go through more steps. Once the volume is muted, the dc voltage of the outputs go to ground.
The time it takes for this stage of the shutdown process is proportional to the size of the BYPASS capacitor. The smaller
the capacitor, the more quickly the device shuts down. See Figure 21. However, making the BYPASS capacitor too small
likely results in unwanted pop. The recommended range of values are between 0.1 F to 1 F.
The start-up time, however, is not dependent upon the volume level. Figures 19 and 20 show that the start-up time for the
TPA6030A4 is not dependent upon the volume level. When the SHUTDOWN pin is held at a logic high (2 V to VCC), the
dc level of the outputs begin to increase. At the same time, the volume control is ramping up until it reaches the desired
volume level.
Figure 17. Shutdown Curve When the
Volume = 0.53 dB
Figure 18. Shutdown Curve When the
Volume = 36 dB
500 ms/div
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| TPA6030A4PWPG4 | 功能描述:音频放大器 Wide Supply Voltage Low Power Class-AB 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 |
| TPA6030A4PWPR | 功能描述:音频放大器 Wide Supply Voltage Low Power Class-AB 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 |
| TPA6030A4PWPRG4 | 功能描述:音频放大器 Wide Supply Voltage Low Power Class-AB 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 |
| TPA6040A4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPath STEREO HEADPHONE DRIVE AND REGULATOR |
| TPA6040A4EVM | 功能描述:音频 IC 开发工具 TPA6040A4 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 |
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