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): 24/37頁
文件大?。?/td> 969K
代理商: TPA0222PWPG4
www.ti.com
C
PCB w
1
2p
PCB
(100 kW)
(14)
SHUTDOWN MODES
TPA0222
SLOS285B – NOVEMBER 1999 – REVISED NOVEMBER 2004
If it is desired to ac-couple the PC-BEEP input, the value of the coupling capacitor should be chosen to satisfy
Equation 14:
The PC-BEEP input can also be dc-coupled to avoid using this coupling capacitor. The pin normally sits at
midrail when no signal is present.
The TPA0222 employs a shutdown mode of operation designed to reduce supply current, IDD, to the absolute
minimum level during periods of nonuse for battery-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 = 150 A. SHUTDOWN should never be left unconnected
because amplifier operation would be unpredictable.
Table 6. HP/LINE, SE/BTL, and Shutdown Functions
INPUTS(1)
AMPLIFIER STATE
HP/LINE
SE/BTL
SHUTDOWN
INPUT
OUTPUT
X
Low
X
Mute
Low
High
Line
BTL
Low
High
Line
SE
High
Low
High
HP
BTL
High
HP
SE
(1)
Inputs should never be left unconnected.
X = do not care
30
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