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參數(shù)資料
| 型號： | TPA2015D1YZHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.7 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA16 |
| 封裝： | 1.954 X 1.954 MM, 0.50 MM PITCH, GREEN, DSBGA-16 |
| 文件頁數(shù)： | 7/27頁 |
| 文件大?。?/td> | 1016K |
| 代理商： | TPA2015D1YZHR |
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www.ti.com
SLOS638 – MAY 2010
SPEAKER LOAD LIMITATION
Speakers are non-linear loads with varying impedance (magnitude and phase) over the audio frequency. A
portion of speaker load current can flow back into the boost converter output via the Class-D output H-bridge
high-side device. This is dependent on the speaker's phase change over frequency, and the audio signal
amplitude and frequency content.
Most portable speakers have limited phase change at the resonant frequency, typically no more than 40 or 50
degrees. To avoid excess flow-back current, use speakers with limited phase change. Otherwise, flow-back
current could exceed the 10 mA rating of the boost converter voltage clamp and drive the PVOUT voltage above
the absolute maximum recommended operational voltage.
Confirm proper operation by connecting the speaker to the TPA2015D1 and driving it at maximum output swing.
Observe the PVOUT voltage with an oscilloscope. In the unlikely event the PVOUT voltage exceeds 6.5 V, add a
6.8 V Zener diode between PVOUT and ground to ensure the TPA2015D1 operates properly.
The amplifier has thermal overload protection and decatives if the die temperature exceeds 150°C. It
automatically reactivates once die temperature returns below 150°C. Built-in output over-current protection
deactivates the amplifier if the speaker load becomes short-circuited. The amplifier automatically restarts within
200 ms after the over-current event. Although the TPA2015D1 Class-D output can withstand a short between
OUT+ and OUT-, do not connect either output directly to GND, PVDD, or VBAT as this could damage the device.
WARNING
Do not connect OUT+ or OUT- directly to GND, PVDD, or VBAT as this could
damage the Class-D output stage.
Copyright 2010, Texas Instruments Incorporated
15
Product Folder Link(s): TPA2015D1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA2015D1YZHR | 制造商:Texas Instruments 功能描述:CLASS-D AUDIO AMPLIFIER IC 制造商:Texas Instruments 功能描述:IC, AUDIO AMPLIFIER, CLASS D, 2W, BGA-16 |
| TPA2015D1YZHT | 功能描述:音頻放大器 2W Class-D Audio 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 |
| TPA2016D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.7-W/Ch Stereo Class-D Audio Amplifier with Dynamic Range Compression and AGC |
| TPA2016D2EVM | 功能描述:音頻 IC 開發(fā)工具 TPA2016D2EVM Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA2016D2RGPR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.7-W/Ch Stereo Class-D Audio Amplifier with Dynamic Range Compression and AGC |
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