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参数资料
| 型号： | TPA1517DWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封装： | GREEN, PLASTIC, SOP-20 |
| 文件页数： | 8/22页 |
| 文件大小： | 540K |
| 代理商： | TPA1517DWPG4 |
www.ti.com
θ
JA +
1
Derating
+
1
0.0228
+ 43.9
°C W
For 0 CFM :
T
A Max + TJ Max *
q
JA PD
+ 150 * 43.9(1.25
2) + 40°C (15 dB headroom, 0 CFM)
60
30
10
0
1
2
3
4
5
6
θ
–
C/W
o
J
A
–
ThetaJA
70
80
90
7
8
9
10
50
40
20
Copper Area
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
The maximum ambient temperature depends on the heatsinking ability of the PCB system. The derating factor
for the NE package with 7 square inches (17.78 cm) of copper area is 22.8 mW/
°C. Converting this to θ
JA:
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
θ
JA, 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 TPA1517 is
150
°C.
Table 1 clearly shows that for most applications some airflow is required to keep junction temperatures in the
specified range. The TPA1517 is designed with thermal protection that turns the device off when the junction
temperature surpasses 150
°C to prevent damage to the IC. Using the DWP package on a multilayer PCB with
internal ground planes can achieve better thermal performance. Table 1 was calculated for a maximum volume
system; 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.
NE THERMAL RESISTANCE,
θ
JA
vs
COPPER AREA
Figure 26.
16
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| TPA1517NEE4 | 功能描述:音频放大器 Stereo Med Power Class-AB 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 |
| TPA1517NEEVM | 功能描述:音频 IC 开发工具 TPA1517NE 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 |
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