- 您現在的位置：買賣IC網 > PDF目錄98271 > TPA2051D3YFFT (TEXAS INSTRUMENTS INC) 2.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA25 PDF資料下載
參數資料
| 型號： | TPA2051D3YFFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA25 |
| 封裝： | 2.16 X 2.11 MM, 0.40 MM PITCH, GREEN, WCSP-25 |
| 文件頁數： | 14/34頁 |
| 文件大小： | 1594K |
| 代理商： | TPA2051D3YFFT |
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頁當前第14頁第15頁第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
DirectPath Headphone Amplifier
Voice Bypass Mode
HEADPHONE AMPLIFIER GAIN
VOLUME CONTROL
www.ti.com ..................................................................................................................................................... SLOS641A – JUNE 2009 – REVISED OCTOBER 2009
Table 1. Class-D Amplifier Gain Levels
CLASS-D GAIN
NOMINAL GAIN
REGISTER BYTE:
SPK_GAIN
0
+6 dB
1
+12 dB
Set the HPL_Enable bit (Register 1, Bit 3) to logic high to enable the headphone left output and the HPR_Enable
bit (Register 1, Bit 2) to logic high to enable the headphone right output. The headphone amplifier draws 4.1 mA
of typical supply current with both left and right outputs active and less than 1
A when deactivated.
Set the VM_Bypass bit (Register 1, Bit 0) to logic high to the bypass mode from BYPASS+ and BYPASS–to the
speaker pins (OUT+ and OUT-pins). This will automatically disable the Class-D speaker amplifier.
The Headphone amplifier gain can be differentiated from the default volume control gain. Register 6, bits 7 to 5
and register 5 bit 6 can be used to attenuate the gain on the headphone amplifier. This function is useful to
differentiate the channel gain of the speaker amplifier from the channel gain of the headphone amplifier. So for
the same input signal different output voltage levels for the speaker and the headphone amplifier can be
selected. The following table shows the gain values. This feature is required since the headphone does not
require the same output voltage level as the speaker amplifier.
Table 2. Headphone Amplifier Gain Levels
HEADPHONE GAIN
REGISTER BYTE:
NOMINAL GAIN
REGISTER BYTE:
NOMINAL GAIN
HP_0dB, HP_GAIN[2:0]
HP_0DB, HP_GAIN[2:0]
0000
-12 dB
0101
-4.5 dB
0001
-10.5 dB
0110
-3 dB
0010
-9 dB
0111
-1.5 dB
0011
-7.5 dB
1xxx
0 dB
0100
-6 dB
The TPA2051D3 has three independent volume controls: One for the mono input configurations (Mode 0), one
for the STEREO1 input pair (INL1 and INR1, when in Mode 1, 3, 5, and 6), and one for the STEREO2 input pair
(INL2 and INR2, when in Mode 2 and 4). Each have 5-bit (32-step) resolution and are audio tapered; gain step
changes become smaller at higher gain settings. All volume controls range from –66 dB to +18 dB.
The Class-D speaker amplifier gain can be selected between 6 dB and 12 dB on top of the volume control. Thus
the total gain for the speaker channel (volume control plus Class-D amplifier) range is from –60 dB to +30 dB.
The headphone amplifiers have a secondary volume control (see Headphone Amplifier Gain section) besides the
main volume control. The secondary volume control ranges from –12 dB to 0 dB in 1.5 dB steps. Thus the total
gain for the headphone channel (volume control plus headphone amplifier) range is from –78 dB to +18 dB.
The Mono Input volume control byte is located in Register 4, Bits 4 to 0. The Stereo Input 1 volume control byte
is located at Register 5, Bits 4 to 0, and the Stereo Input 2 volume control byte is at Register 6, Bits 4 to 0. Gain
matching between the left and right channels for STEREO1 and STEREO2 is presented in the operating
characteristics table.
The input impedance to the TPA2051D3 changes as gain changes. See the Operating Characteristics section for
specifications. Values listed in Table 3 are nominal values.
When the SpeakerGuardTM (Automatic Gain Control) is enabled the volume changes at a rate dictated by the
attack time (volume decrease) and the release time (volume increase).
Copyright 2009, Texas Instruments Incorporated
21
Product Folder Link(s): TPA2051D3
相關PDF資料 |
PDF描述 |
|---|---|
| TPA2054D4AYZKR | 0.94 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA25 |
| TPA2054D4AYZKT | 0.94 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA25 |
| TPA2054D4YZKR | 0.94 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA25 |
| TPA2054D4YZKT | 0.94 W, 2 CHANNEL, AUDIO AMPLIFIER, BGA25 |
| TPA2100P1YZHR | 1 CHANNEL, AUDIO AMPLIFIER, PBGA16 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA2054D4A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.4 W/CH STEREO CLASS-D AUDIO SUBSYSTEM WITH DirectPatha?￠ HEADPHONE AMPLIFIER AND 3:1 INPUT MUX |
| TPA2054D4AYZKR | 功能描述:音頻放大器 1.4 W/Ch 3-Inp Audio Subsystem 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 |
| TPA2054D4AYZKT | 功能描述:音頻放大器 1.4 W/Ch 3-Inp Audio Subsystem 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 |
| TPA2054D4YZKEVM | 功能描述:音頻 IC 開發工具 TPA2054D4YZKEVM 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 |
| TPA2054D4YZKR | 功能描述:音頻放大器 1.4 W/Ch Stereo Class-D Aud Subsys 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 |
發布緊急采購，3分鐘左右您將得到回復。