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參數(shù)資料
| 型號(hào)： | TPA032D04DCAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| 封裝： | GREEN, PLASTIC, HTSSOP-48 |
| 文件頁(yè)數(shù)： | 13/26頁(yè) |
| 文件大小： | 439K |
| 代理商： | TPA032D04DCAR |
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TPA032D04
10W STEREO CLASSD AUDIO POWER AMPLIFIER
SLOS203B DECEMBER 1999 REVISED JUNE 2000
21
TI.COM
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 TPA032D04 data sheet, one can see that when the
TPA032D04 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
TPA032D04 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 |
|---|---|
| TPA032D04DCARG4 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA032D04EVM | 制造商:Texas Instruments 功能描述:EVAL KIT FOR 10-W STEREO CLS-D AUD PWR AMP - Bulk |
| TPA-10 | 功能描述:保險(xiǎn)絲 TELPOWER ALARM FUSE RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險(xiǎn)絲類(lèi)型:Fast Acting 保險(xiǎn)絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類(lèi)型:SMD/SMT 系列:485 |
| TPA100 | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 100V 50uA Bidirect RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C |
| TPA100RL | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 100V 50uA Bidirect RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C |
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