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參數資料
| 型號： | TPA032D02DCA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| 封裝： | PLASTIC, HTSSOP-48 |
| 文件頁數： | 13/27頁 |
| 文件大小： | 584K |
| 代理商： | TPA032D02DCA |
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TPA032D02
10W STEREO CLASSD AUDIO POWER AMPLIFIER
SLOS243B DECEMBER 1999 REVISED JUNE 2000
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
crest factor and thermal considerations
A typical music CD requires 12 dB to 15 dB of dynamic headroom to pass the loudest portions without distortion
as compared with the average power output. From the TPA032D02 data sheet, one can see that when the
TPA032D02 is operating from a 12-V supply into a 4-
speaker that 20-W peaks are available. Converting watts
to dB:
P
dB + 10 Log
P
W
P
ref
+ 10Log 20
1
+ 6dB
(17)
Subtracting the crest factor restriction to obtain the average listening level without distortion yields:
6.0 dB
* 15 dB +* 9dB (15 dB crest factor)
6.0 dB
* 12 dB +* 6dB (12 dB crest factor)
6.0 dB
* 9dB +* 3dB (9dBcrest factor)
6.0 dB
* 6dB +* 0dB (6dBcrest factor)
6.0 dB
* 3dB + 3dB (3 dB crest factor)
6.0 dB
* 18 dB +* 12 dB (15 dB crest factor)
Converting dB back into watts:
P
W + 10
PdB 10
P
ref
+ 630 mW (15 dB crest factor)
+ 1.25 W (12 dB crest factor)
+ 2.5 W (9 dB crest factor)
+ 5 W (6 dB crest factor)
+ 10 W (3 dB crest factor)
(18)
+ 315 mW (18 dB crest factor)
This is valuable information to consider when attempting to estimate the heat dissipation requirements for the
amplifier system. Comparing the absolute worst case, which is 10 W of continuous power output with a 3 dB
crest factor, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings for
the system. Using the power dissipation curves for a 12-V, 4-
system, the internal dissipation in the
TPA032D02 and maximum ambient temperatures are shown in Table 3.
相關PDF資料 |
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|---|---|
| TPA032D02DCAG4 | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| TPA032D02DCARG4 | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| TPA032D03DCAR | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| TPA032D03DCA | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| TPA032D04DCAR | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA032D02DCAG4 | 功能描述:音頻放大器 Stereo Medium Power Class-D Audio Amp 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 |
| TPA032D02DCAR | 功能描述:音頻放大器 Stereo Med Power Class-D 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 |
| TPA032D02DCARG4 | 功能描述:音頻放大器 Stereo Medium Power Class-D Audio Amp 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 |
| TPA032D02EVM | 制造商:Texas Instruments 功能描述:CLASS-D STEREO AUDIO POWER AMP EVM - Bulk |
| TPA032D03 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W MONO CLASS-D AUDIO POWER AMPLIFIER |
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