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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： | 32/45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
38
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
headroom and thermal considerations
Linear power amplifiers dissipate a significant amount of heat in the package under normal operating conditions.
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 TPA0202 data sheet, one can see that when the
TPA0202 is operating from a 5-V supply into a 3-
speaker that 2 W peaks are available. Converting watts to
dB:
P
dB + 10 Log
P
W
P
ref
+ 10Log 2
1
+ 3.0 dB
(17)
Subtracting the headroom restriction to obtain the average listening level without distortion yields:
3.0 dB
* 15 dB +* 12 dB (15 dB headroom)
3.0 dB
* 12 dB +* 9dB (12 dB headroom)
3.0 dB
* 9dB +* 6dB (9 dB headroom)
3.0 dB
* 6dB +* 3dB (6 dB headroom)
3.0 dB
* 3dB + 0dB (3 dB headroom)
Converting dB back into watts:
P
W + 10
PdB 10
P
ref
+ 63 mW (15 dB headroom)
+ 120 mW (12 dB headroom)
+ 250 mW (9 dB headroom)
+ 500 mW (6 dB headroom)
+ 1000 mW (3 dB headroom)
(18)
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 2 W of continuous power output with 0 dB of
headroom, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings for
the system. Using the power dissipation curves for a 5-V, 3-
system, the internal dissipation in the TPA0202
and maximum ambient temperatures is shown in Table 4.
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| TPA0211DGN | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0211DGNR | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0211DGNG4 | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0211DGNRG4 | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA0212PWPG4 | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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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