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參數(shù)資料
| 型號： | TPA0211DGNRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 10/27頁 |
| 文件大?。?/td> | 770K |
| 代理商： | TPA0211DGNRG4 |
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TPA0211
2-W MONO AUDIO POWER AMPLIFIER
SLOS275D – JANUARY 2000 – REVISED NOVEMBER 2002
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
crest factor and thermal considerations (continued)
Converting dB back into watts:
P
W + 10
PdB 10
P
ref
+ 63 mW (18-dB crest factor)
+ 125 mW (15-dB crest factor)
+ 250 mW (9-dB crest factor)
+ 500 mW (6-dB crest factor)
+ 1000 mW (3-dB crest factor)
(12)
+ 2000 mW (15-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 2 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. Table 3 shows maximum ambient temperatures and TPA0211 internal power dissipation for various
output-power levels.
Table 3. TPA0211 Power Rating, 5-V, 4-
, Mono
PEAK OUTPUT POWER
(W)
AVERAGE OUTPUT POWER
POWER DISSIPATION
(W)
MAXIMUM AMBIENT
TEMPERATURE
4
2 W (3-dB crest factor)
1.7
– 3
°C
4
1000 mW (6-dB crest factor)
1.6
6
°C
4
500 mW (9-dB crest factor)
1.4
24
°C
4
250 mW (12-dB crest factor)
1.1
51
°C
4
125 mW (15-dB crest factor)
0.8
78
°C
4
63 mW (18-dB crest factor)
0.6
96
°C
As a result, this simple formula for calculating PDmax may be used for an 4- application:
P
Dmax +
2V2
DD
p2R
L
(13)
However, in the case of a 4-
load, the PDmax occurs at a point well above the normal operating power level.
The amplifier may therefore be operated at a higher ambient temperature than required by the PDmax formula
for a 4-
load.
The maximum ambient temperature depends on the heat sinking ability of the PCB system. The derating factor
for the DGN package is shown in the dissipation rating table. Converting this to
ΘJA:
Θ
JA +
1
Derating Factor
+
1
0.0171
+ 58.48°C W
(14)
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| TPA0211EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0211 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 |
| TPA0212 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO 2-W AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL |
| TPA0212_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO 2.6-W AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL |
| TPA0212EVM | 功能描述:音頻 IC 開發(fā)工具 TPA0212 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 |
| TPA0212PWP | 功能描述:音頻放大器 2W Stereo A 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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