- 您現在的位置：買賣IC網 > PDF目錄98272 > TPA3002D2PHPG4 (TEXAS INSTRUMENTS INC) 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 PDF資料下載
參數資料
| 型號： | TPA3002D2PHPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
| 封裝： | GREEN, PLASTIC, HTQFP-48 |
| 文件頁數： | 16/40頁 |
| 文件大?。?/td> | 735K |
| 代理商： | TPA3002D2PHPG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
TPA3002D2
SLOS402C DECEMBER 2002 REVISED JANUARY 2004
www.ti.com
23
Some audio systems require that the gain be limited in the VAROUT mode to a level that is comfortable for
headphone listening. The VARMAX terminal controls the maximum gain for the VAROUT channels.
The functionality of the VARDIFF and VARMAX pin are combined to fix the VAROUT channel gain. A block
diagram of the combined functionality is shown in Figure 35. The value obtained from the block diagram for
VAROUT_VOLUME is a DC voltage that can be used in conjunction with Table 2 to determine the VAROUT
channel gain. Table 2 lists the gain in VAROUT mode as determined by the VAROUT_VOLUME voltage in
reference to the voltage on VREF.
The timing of the volume control circuitry is controlled by an internal 30 Hz clock. This clock determines the rate
at which the gain changes when adjusting the voltage on the external volume control pins. The gain updates
every 4 clock cycles (nominally 133 ms based on a 30Hz clock) to the next step until the final desired gain is
reached. For example, if the TPA3002D2 is currently in the +0.53 db class-D gain step and the VOLUME pin
is adjusted for maximum gain at +36 dB, the time required for the gain to reach 36dB is 14 steps x 133 ms/step
= 1.862 seconds. Referencing Table 1, there are 14 steps between the +0.53 dB gain step and the maximum
gain step of +36 dB.
VARMAX (V)
VOLUMEVARDIFF
VARDIFF (V)
+
VOLUME (V)
NO
YES
VAROUT_VOLUME (V) = VOLUME (V) VARDIFF (V)
VAROUT_VOLUME (V) = VARMAX (V)
Is VARMAX>
(VOLUMEVARDIFF)
?
Figure 35. Block Diagram of VAROUT Volume Control
0.5
3.1
5.6
2.10
2.00
2.11
2.21
Class-D
Gain
dB
Voltage on VOLUME Pin V
Decreasing Voltage on VOLUME Terminal
Increasing Voltage on VOLUME Terminal
(40.1%*VREF)
(44.1%*VREF)
(42.3%*VREF)
(41.9%*VREF)
Figure 36. DC Volume Control Operation, VREF = 5 V
相關PDF資料 |
PDF描述 |
|---|---|
| TPA3003D2PFBR | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
| TPA3003D2PFB | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
| TPA3003D2PFBRG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
| TPA3003D2PFBG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
| TPA3004D2PHPRG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PQFP48 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA3002D2PHPR | 功能描述:音頻放大器 Stereo Med Pwr Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3002D2PHPRG4 | 功能描述:音頻放大器 Stereo Med Pwr Filter-Free Class-D RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3003D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-Q STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL |
| TPA3003D2_06 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-Q STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL |
| TPA3003D2EVM | 功能描述:音頻 IC 開發工具 TPA3003D2 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
發布緊急采購，3分鐘左右您將得到回復。