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參數(shù)資料
| 型號(hào)： | TPA6030A4PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | GREEN, PLASTIC, TSSOP-28 |
| 文件頁(yè)數(shù)： | 5/32頁(yè) |
| 文件大?。?/td> | 698K |
| 代理商： | TPA6030A4PWPR |
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TPA6030A4
SLOS395B DECEMBER 2002 REVISED JANUARY 2005
www.ti.com
13
CLOCK PIN
The TPA6030A4 has an internal clock whose frequency is controlled by the value of an external capacitor on pin 20. The
relationship between the capacitor and the clock frequency is seen in Figure 15.
The clock plays a pivotal role in the functionality of the TPA6030A4. It determines how quickly the volume can change.
When a voltage is applied to the VOLUME pin (or if in SE mode, the SEDIFF or SEMAX pins as well), it causes a change
in volume. The volume does not change instantaneously. It moves one step for every sixteen clock cycles. For example,
if the volume is initially at 36 dB in BTL mode, and then a voltage is applied to the VOLUME pin to set the volume to 0.53 dB,
the volume decreases by 14 steps. With a 47-nF capacitor connected to the clock pin, the clock frequency is 390 Hz. The
time it takes for the volume to reach the desired level is 574 ms. See equation 1.
Total time + # of Volume Steps
16
Clock Frequency
Figure 16 demonstrates how the volume changes with respect to the clock cycles, and how the frequency of the clock
affects the time necessary for each step. The triangular waveform is the voltage on the clock pin, and in this case, the clock
frequency is 390 Hz. Each volume step takes 41 ms, which is consistent with equation 1.
100
1 k
10 k
1
10
100
f
Frequency
Hz
Clock Capacitor nF
400
50
Figure 15. Clock Frequency vs Capacitance on Clock Pin
Figure 16. How the Volume Changes With Respect to the Clock
(1)
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| TPA6030A4PWPRG4 | 功能描述:音頻放大器 Wide Supply Voltage Low Power Class-AB RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6040A4 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPath STEREO HEADPHONE DRIVE AND REGULATOR |
| TPA6040A4EVM | 功能描述:音頻 IC 開發(fā)工具 TPA6040A4 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA6040A4RHB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH DirectPath STEREO HEADPHONE DRIVE AND REGULATOR |
| TPA6040A4RHBR | 功能描述:音頻放大器 2W Stereo Aud Pwr RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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