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參數資料
| 型號： | TPA0202PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封裝： | GREEN, PLASTIC, HTSSOP-24 |
| 文件頁數： | 26/45頁 |
| 文件大?。?/td> | 1035K |
| 代理商： | TPA0202PWPRG4 |
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TPA0202
2-W STEREO AUDIO POWER AMPLIFIER
SLOS205B – FEBRUARY 1998 – REVISED DECEMBER 2000
32
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
50 k
BYPASS
VDD
100 k
100 k
Figure 64. PNP Transistor Clamping of BYPASS Terminal
The PNP transistor limits the voltage drop across the 50 k
resistor by slewing the internal node slowly when
power is applied. At start-up, the xBYPASS capacitor is at 0. The PNP is pulling the mid-point of the bias circuit
down, so the capacitor sees a lower effective voltage, and thus charges slower. This appears as a linear ramp
(while the PNP transistor is conducting), followed by the expected exponential ramp of an R-C circuit.
If the expression in equation 10 cannot be fulfilled or the small amount of pop is still unacceptable for the
application, then external circuitry must be added that can eliminate the pop heard during power up and while
transitioning out of mute or shutdown modes.
By holding the device in SE mode when the pop normally occurs, no pop can be heard through the
BTL-connected speakers (as the negative output is in a high impedance state when the amplifier is in SE mode).
From a hardware point of view, the easiest way to implement this is to drive the SE/BTL terminal from the
general-purpose input-output (GPIO) in the system. If the SE/BTL terminal is normally connected to a
headphone socket (as shown in Figure 65), then the GPIO signal must either be taken through an OR gate (see
Figure 65) or isolated with a diode (any signal diode) (see Figure 66).
Rm2
100 k
Rm1
100 k
VDD
Left
Channel
From GPIO
Right
Channel
SE/BTL
0.1
F
Figure 65. Implementation with an OR Gate
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相關代理商/技術參數 |
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| TPA0211 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER |
| TPA0211_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER |
| TPA0211DGN | 功能描述:音頻放大器 2W Mono Audio 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 |
| TPA0211DGNG4 | 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 |
| TPA0211DGNR | 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 |
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