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參數(shù)資料
| 型號： | TPA005D02DCAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 |
| 封裝： | PLASTIC, HTSSOP-48 |
| 文件頁數(shù)： | 15/25頁 |
| 文件大小： | 373K |
| 代理商： | TPA005D02DCAR |
TPA005D02
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS227C – AUGUST 1998 – REVISED MARCH 2000
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
crest factor and thermal considerations (continued)
Table 4. TPA005D02 Power Rating, 5-V, 4-
, Stereo
PEAK OUTPUT POWER
AVERAGE OUTPUT POWER
POWER DISSIPATION
MAXIMUM AMBIENT
(W)
AVERAGE OUTPUT POWER
(W/Channel)
TEMPERATURE
4
2 W (3 dB)
0.56
125
°C
4
1000 mW (6 dB)
0.30
136
°C
4
500 mW (9 dB)
0.23
139
°C
4
250 mW (12 dB)
0.20
141
°C
4
120 mW (15 dB)
0.14
143
°C
4
63 mW (18 dB)
0.09
146
°C
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
DERATING FACTOR
TA = 70°C
TA = 85°C
DCA
5.6 W
44.8 mW/
°C
3.5 W
2.9 W
The maximum ambient temperature depends on the heatsinking ability of the PCB system. Using the 0 CFM
data from the dissipation rating table, the derating factor for the DCA package with 6.9 in2 of copper area on
a multilayer PCB is 44.8 mW/
°C. Converting this to ΘJA:
Θ
JA +
1
Derating
+
1
0.0448
+ 22.3°C W
(19)
To calculate maximum ambient temperatures, first consider that the numbers from the dissipation graphs are
per channel so the dissipated heat needs to be doubled for two channel operation. Given
ΘJA, the maximum
allowable junction temperature, and the total internal dissipation, the maximum ambient temperature can be
calculated with the following equation. The maximum recommended junction temperature for the TPA005D02
is 150
°C. The internal dissipation figures are taken from the Efficiency vs Output Power graphs.
T
A Max + TJ Max * ΘJA PD
+ 150 * 22.3(0.14
2)
+ 143°C (15 dB crest factor)
+ 150 * 22.3(0.56
2)
+ 125°C (3dB crest factor)
(20)
NOTE:
Internal dissipation of 0.6 W is estimated for a 2-W system with a 15 dB crest factor per channel.
Table 4 shows that for some applications no airflow is required to keep junction temperatures in the specified
range. The TPA005D02 is designed with thermal protection that turns the device off when the junction
temperature surpasses 150
°C to prevent damage to the IC. Table 4 was calculated for maximum listening
volume without distortion. When the output level is reduced the numbers in the table change significantly. Also,
using 8-
speakers dramatically increases the thermal performance by increasing amplifier efficiency.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPA005D12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA005D12DCA | 功能描述:音頻放大器 2W Stereo P 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA005D12DCAR | 制造商:Rochester Electronics LLC 功能描述:CLASS-D STEREO AUDIO POWER AMPLIFIER - Bulk |
| TPA005D14 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA005D14DCA | 功能描述:音頻放大器 2W Stereo P 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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