參數(shù)資料
型號(hào)： TPA1517DWP
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20
封裝： GREEN, PLASTIC, SOP-20
文件頁(yè)數(shù)： 8/22頁(yè)
文件大小： 540K
代理商： TPA1517DWP
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA1517DWP 制造商:Texas Instruments 功能描述:POWER AMP CLASS-A AUDIO SMD 1517
TPA1517DWPEVM 功能描述:音頻 IC 開(kāi)發(fā)工具 TPA1517DWP Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
TPA1517DWPG4 功能描述:音頻放大器 6W Stereo Amp 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
TPA1517DWPR 功能描述:音頻放大器 Stereo Med Power Class-AB 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
TPA1517DWPRG4 功能描述:音頻放大器 Stereo Med Power Class-AB 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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