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| 型號(hào)： | TPA6021A4N |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDIP20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MS001-AD, DIP-20 |
| 文件頁數(shù)： | 5/25頁 |
| 文件大?。?/td> | 1823K |
| 代理商： | TPA6021A4N |
www.ti.com
SE/BTL
ROUT+
20
RIN+
4
5
RIN-
ROUT-
2
1 kW
CO
330 F
m
100 kW
19
100 kW
VDD
_
+
_
+
Bypass
_
+
Bypass
EN
_
+
Bypass
LOUT+
SHUTDOWN MODES
FADE OPERATION
TPA6021A4
SLOS465 – JUNE 2005
APPLICATION INFORMATION (continued)
Figure 21. TPA6021A4 Resistor Divider Network Circuit
Using a 1/8-in. (3,5 mm) stereo headphone jack, the control switch is closed when no plug is inserted. When
closed the 100-k
/1-k divider pulls the SE/BTL input low. When a plug is inserted, the 1-k resistor is
disconnected and the SE/BTL input is pulled high. When the input goes high, the OUT– amplifier is shut down
causing the speaker to mute (open-circuits the speaker). The OUT+ amplifier then drives through the output
capacitor (Co) into the headphone jack.
The TPA6021A4 employs a shutdown mode of operation designed to reduce supply current (IDD) to the absolute
minimum level during periods of nonuse for power conservation. The SHUTDOWN input terminal should be held
high during normal operation when the amplifier is in use. Pulling SHUTDOWN low causes the outputs to mute
and the amplifier to enter a low-current state, IDD = 20 A. SHUTDOWN should never be left unconnected
because amplifier operation would be unpredictable.
Table 1. SE/BTL and Shutdown Functions
INPUTS(1)
AMPLIFIER STATE
SE/BTL
SHUTDOWN
OUTPUT
X
Low
Mute
Low
High
BTL
High
SE
(1)
Inputs should never be left unconnected.
For design flexibility, a fade mode is provided to slowly ramp up the amplifier gain when coming out of shutdown
mode and conversely ramp the gain down when going into shutdown. This mode provides a smooth transition
between the active and shutdown states and virtually eliminates any pops or clicks on the outputs.
13
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| TPA6021A4N | 制造商:Texas Instruments 功能描述:Audio Power Amplifier IC 制造商:Texas Instruments 功能描述:IC, AUDIO POWER AMP, CLASS AB, 2W, DIP20 |
| TPA6021A4NE4 | 功能描述:音頻放大器 Stereo Class-AB w/Ster Hdphn Drive 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 |
| TPA6030A4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3-W Stereo Audio Power Amplifier with Advanced DC Volume Control |
| TPA6030A4_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-2 STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL |
| TPA6030A4EVM | 功能描述:音頻 IC 開發(fā)工具 TPA6030A4 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
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