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參數(shù)資料
| 型號(hào)： | TPA032D01DCAR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 10-W MONO CLASS-D AUDIO POWER AMPLIFIER |
| 中文描述： | 10單聲道D類音頻功率放大器 |
| 文件頁數(shù)： | 19/25頁 |
| 文件大?。?/td> | 550K |
| 代理商： | TPA032D01DCAR |
SLOS282B DECEMBER 1999 REVISED JUNE 2000
19
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 TPA032D01 data sheet, one can see that when the
TPA032D01 is operating from a 12-V supply into a 4-
speaker that 20-W peaks are available. Converting watts
to dB:
P
dB
10Log
P
W
P
ref
10Log20
1
6 dB
(17)
Subtracting the crest factor restriction to obtain the average listening level without distortion yields:
6.0 dB
6.0 dB
6.0 dB
6.0 dB
6.0 dB
15 dB
12 dB
9 dB
6 dB
3 dB
9 dB (15 dB crest factor)
6 dB (12 dB crest factor)
3 dB (9 dB crest factor)
0 dB (6 dB crest factor)
3 dB (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
TPA032D01 and maximum ambient temperatures are shown in Table 3.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA032D01DCARG4 | 功能描述:音頻放大器 Class-D Audio Power 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 |
| TPA032D01EVM | 制造商:Texas Instruments 功能描述:MONO CLASS-D AUDIO POWER AMPLIFIER EVM - Bulk |
| TPA032D02 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA032D02_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA032D02DCA | 功能描述:音頻放大器 10W Class-D 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 |
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