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參數資料
型號: TPA0312PWP
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻控制
英文描述: 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
封裝: GREEN, PLASTIC, HTSSOP-24
文件頁數: 21/36頁
文件大小: 791K
代理商: TPA0312PWP
www.ti.com
INPUT MUX OPERATION
ROUT+
21
R
MUX
RHPIN
RLINEIN
+
23
20
8
RIN
ROUT 16
+
SE/BTL
15
Volume
Control
Volume
Control
2
HP/LINE
CIRHP
0.47
F
Right
Headphone
Input Signal
CIRLINE
0.47
F
Right Line
Input Signal
CRIN
0.47
F
TPA0312
SLOS335A – DECEMBER 2000 – REVISED OCTOBER 2004
Figure 43. TPA0312 Example Input MUX Circuit
The TPA0312 offers the capability for the designer to use separate headphone inputs (RHPIN, LHPIN) and line
inputs (RLINEIN, LLINEIN). The inputs can be different if the input signal is single-ended. If using a differential
input signal, the inputs must be the same because the inputs share a common RIN, LIN. Although the typical
application in Figure 37 shows the input mux control signal HP/LINE tied to SE/BTL, that configuration is not
required. The input mux can be used to select between two inputs that are used in both SE and BTL modes.
If using the TPA0312 with a single-ended input, the RIN and LIN terminals must be tied through a capacitor to
ground, as shown in Figure 43. RIN and LIN must not be tied to bypass or an offset occurs on the output causing
the device to pop when turning on and off.
Input coupling capacitors can be eliminated when using differential inputs, but are used to obtain maximum
output power. If the input capacitors are eliminated, the dc offset must match the voltage on BYPASS or the
output power is limited.
28
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相關代理商/技術參數
參數描述
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TPA0312PWPRG4 功能描述:音頻放大器 St 2W Aud Pwr Amp 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
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