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參數(shù)資料
| 型號(hào)： | TPA0312PWPR |
| 元件分類： | 音頻放大器 |
| 英文描述： | SWITCH, DPDT, R/A, PCB, ON-OFF-ON; Switch function type:On-Off-On; Material, contact:Copper Alloy; Temp, op. max:85(degree C); Temp, op. min:-30(degree C); Length / Height, external:9.14mm; Width, external:8.13mm; Depth, RoHS Compliant: Yes |
| 中文描述： | 音頻放大器|雙|的CMOS | TSSOP封裝| 24針|塑料 |
| 文件頁數(shù)： | 29/31頁 |
| 文件大小： | 445K |
| 代理商： | TPA0312PWPR |
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TPA0312
2-W STEREO AUDIO POWER AMPLIFIER
WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL
SLOS335 –DECEMBER 2000
29
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
PC BEEP operation
The PC BEEP input allows a system beep to be sent directly from a computer through the amplifier to the
speakers with few external components. The input is activated automatically. When the PC BEEP input is active,
both of the LINEIN and HPIN inputs are deselected and both the left and right channels are driven in BTL mode
with the signal from PC BEEP. The gain from the PC BEEP input to the speakers is fixed at 0.3 V/V and is
independent of the volume setting. When the PC BEEP input is deselected, the amplifier will return to the
previous operating mode and volume setting. Furthermore, if the amplifier is in shutdown mode, activating PC
BEEP will take the device out of shutdown and output the PC BEEP signal, then return the amplifier to shutdown
mode.
The preferred input signal is a square wave or pulse train with an amplitude of 1 V
pp
or greater. To be accurately
detected, the signal must have a minimum of 1 V
pp
amplitude, rise and fall times of less than 0.1
μ
s and a
minimum of 8 rising edges. When the signal is no longer detected, the amplifier will return to its previous
operating mode and volume setting.
If it is desired to ac-couple the PC BEEP input, the value of the coupling capacitor should be chosen to satisfy
equation 14:
C
PCB
1
2
PCB
(100 k )
(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.
shutdown modes
The TPA0312 employs a shutdown mode of operation designed to reduce supply current, I
DD
, 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, I
DD
= 150
μ
A. SHUTDOWN should never be left
unconnected because amplifier operation would be unpredictable.
Table 6. HP/LINE, SE/BTL, and Shutdown Functions
INPUTS
SE/BTL
AMPLIFIER STATE
HP/LINE
SHUTDOWN
INPUT
OUTPUT
X
X
Low
X
Mute
Low
Low
High
Line
BTL
Low
High
High
Line
SE
High
Low
High
HP
BTL
High
High
High
HP
SE
Inputs should never be left unconnected.
X = do not care
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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(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 |
| TPA032D01 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W MONO CLASS-D AUDIO POWER AMPLIFIER |
| TPA032D01_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W MONO CLASS-D AUDIO POWER AMPLIFIER |
| TPA032D01DCA | 功能描述:音頻放大器 10W Monaur 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 |
| TPA032D01DCA | 制造商:Texas Instruments 功能描述:IC SM POWER AMP CLASS-D AUDIO |
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