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| 型号： | TPA0103PWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封装： | GREEN, PLASTIC, HTSSOP-24 |
| 文件页数： | 30/43页 |
| 文件大小： | 1123K |
| 代理商： | TPA0103PWPG4 |
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TPA0103
1.75-W 3-CHANNEL STEREO AUDIO POWER AMPLIFIER
SLOS167A – JULY 1997 – REVISED MARCH 2000
36
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
headroom and thermal considerations (continued)
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
DERATING FACTOR
TA = 70°C
TA = 85°C
PWP
2.7 W
21.8 mW/
°C
1.7 W
1.4 W
PWP
2.8 W
22.1 mW/
°C
1.8 W
1.4 W
This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 4 in2 5-in
× 5-in PCB, 1 oz.
copper, 2-in
× 2-in coverage.
This parameter is measured with the recommended copper heat sink pattern on an 8-layer PCB, 6.9 in2 1.5-in
× 2-in PCB,
1 oz. copper with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in2) and layers 3 and 6 at 100% coverage (6 in2).
The maximum ambient temperature depends on the heatsinking ability of the PCB system. Using the 0 LFM
and 300 LFM data from the dissipation rating table, the derating factor for the PWP package with 6.9 in2 of
copper area on a multilayer PCB is 22.1 mW/
°C and 53.7 mW/°C respectively. Converting this to ΘJA:
Θ
JA +
1
Derating
+
1
22.1 mW
°C
+ 45°C W
+
1
53.7 mW
°C
+ 18°C W
For 0 LFM :
For 300 LFM :
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 the two SE channels and added to the center channel
dissipation. 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 TPA0103 is 150
°C. The internal dissipation figures are taken from the Power
Dissipation vs Output Power graphs.
T
A Max + TJ Max * ΘJA PD
+ 125 * 45(0.2
2
) 0.6) + 80°C (15 dB headroom, 0 LFM)
+ 125 * 18(0.2
2
) 0.6) + 107°C (15 dB headroom, 300 LFM)
NOTE:
Internal dissipation of 1 W is estimated for a 3-channel system with 15 dB headroom per channel
(see Table 4 for more information).
Table 4 shows that for most applications no airflow is required to keep junction temperatures in the specified
range. The TPA0103 is designed with thermal protection that turns the device off when the junction temperature
surpasses 150
°C to prevent damage to the IC. However, sustained operation above 125°C is not
recommended. 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA0103PWPR | 功能描述:音频放大器 1.75-W STEREO AUDIO POWER AMPLIFIER RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA0103PWPRG4 | 功能描述:音频放大器 1.75-W STEREO AUDIO POWER AMPLIFIER RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TPA0112 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS |
| TPA0112EVM | 功能描述:音频 IC 开发工具 TPA0112 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TPA0112PWP | 功能描述:音频放大器 2W Stereo A RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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