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參數資料
| 型號： | TPA711DR |
| 元件分類： | 運動控制電子 |
| 英文描述： | Single Audio Amplifier |
| 中文描述： | 單音頻放大器 |
| 文件頁數： | 27/32頁 |
| 文件大小： | 522K |
| 代理商： | TPA711DR |
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TPA711
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS230C
–
NOVEMBER 1998
–
REVISED APRIL 2001
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
SE/BTL operation
The ability of the TPA711 to easily switch between BTL and SE modes is one of its most important cost-saving
features. This feature eliminates the requirement for an additional earphone amplifier in applications where
internal speakers are driven in BTL mode but external earphone or speaker must be accommodated. Internal
to the TPA711, two separate amplifiers drive V
O
+ and V
O
–
. The SE/BTL input (terminal 3) controls the operation
of the follower amplifier that drives V
O
–
(terminal 8). When SE/BTL is held low, the amplifier is on and the TPA711
is in the BTL mode. When SE/BTL is held high, the V
O
–
amplifier is in a high output impedance state, which
configures the TPA711 as an SE driver from V
O
+ (terminal 5). I
DD
is reduced by approximately one-half in SE
mode. Control of the SE/BTL input can be from a logic-level TTL source or, more typically, from a resistor divider
network as shown in Figure 52.
Bias
Control
5
7
VO+
3
1
2
4
BYPASS
IN
SE/BTL
SHUTDOWN
VO
–
8
GND
CC
1 k
100 k
VDD
100 k
–
+
–
+
0.1
μ
F
Figure 52. TPA711 Resistor Divider Network Circuit
Using a readily available 1/8-in. (3.5 mm) mono earphone 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 V
O
–
amplifier is shut
down causing the BTL speaker to mute (virtually open-circuits the speaker). The V
O
+ amplifier then drives
through the output capacitor (C
C
) into the earphone jack.
using low-ESR capacitors
Low-ESR capacitors are recommended throughout this applications section. A real (as opposed to ideal)
capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this
resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this
resistance the more the real capacitor behaves like an ideal capacitor.
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| TPD11DIL | ****GESTRICHEN**** |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA711DRG4 | 功能描述:音頻放大器 Mono Class-AB w/Mono Hdphone Drive 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 |
| TPA711EVM | 制造商:TI 制造商全稱:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER |
| TPA711MSOPEVM | 功能描述:音頻 IC 開發工具 TPA711MSOP 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 |
| TPA71242 | 制造商:TE Connectivity 功能描述: |
| TPA721 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER |
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