參數(shù)資料
型號: TPA0222PWPG4
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(shù): 21/37頁
文件大小: 969K
代理商: TPA0222PWPG4
www.ti.com
ROUT+
21
R
MUX
RHPIN
RLINEIN
+
23
20
8
RIN
ROUT
16
+
1 k
COUTR
330
F
100 k
SE/BTL
15
100 k
VDD
Volume
Control
Volume
Control
TPA0222
SLOS285B – NOVEMBER 1999 – REVISED NOVEMBER 2004
Figure 47. TPA0222 Resistor Divider Network Circuit
Using a readily available 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 (virtually open-circuits the speaker). The OUT+ amplifier then drives
through the output capacitor (CO) into the headphone jack.
28
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