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參數(shù)資料
| 型號(hào)： | TDA8512J |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 26 W BTL and 2 x 13 W SE or 4 x 13 W SE power amplifier |
| 中文描述： | 13 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| 封裝： | PLASTIC, DIL-BENT-SIL, 17 PIN |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 165K |
| 代理商： | TDA8512J |
2001 Nov 16
8
Philips Semiconductors
Preliminary specification
26 W BTL and 2
×
13 W SE or
4
×
13 W SE power amplifier
TDA8512J
11 THERMAL CHARACTERISTICS
In accordance with IEC 60747-1.
The measured thermal resistance of the IC-package (R
th(j-c)
) is maximum 1.3 K/W if all four channels are driven. For a
maximum ambient temperature of 60
°
C and V
P
= 15 V, the following calculation for the heatsink can be made:
For the application two SE outputs with 2
load, the measured worst-case sine-wave dissipation is 2
×
7 W
For the application BTL output with 4
load, the worst-case sine-wave dissipation is 12.5 W.
So the total power dissipation is P
d(tot)
= 2
×
7 + 12.5 W = 26.5 W.
At T
j(max)
= 150
°
C the temperature increase, caused by the power dissipation, is:
T = 150
°
C
60
°
C = 90
°
C.
So P
d(tot)
×
R
th(tot)
=
T = 90 K. As a result:
which means:
R
th(hs)
= R
th(tot)
R
th(j-c)
= 3.4
1.3 = 2.1 K/W.
The above calculation is for application at worst-case (stereo) sine-wave output signals. In practice, music signals will be
applied. In that case the maximum power dissipation will be about the half the sine-wave power dissipation, which allows
the use of a smaller heatsink.
So P
d(tot)
×
R
th(tot)
=
T = 90 K. As a result:
which means:
R
th(hs)
= R
th(tot)
R
th(j-c)
= 6.8
1.3 = 5.5 K/W.
SYMBOL
PARAMETER
CONDITIONS
VALUE
UNIT
R
th(j-a)
R
th(j-c)
thermal resistance from junction to ambient
thermal resistance from junction to case
in free air
see Fig.5
40.0
1.3
K/W
K/W
R
th tot
)
26.5
3.4 K/W
=
=
R
th tot
)
13.25
----90
6.8 K/W
=
=
handbook, halfpage
3.0 K/W
0.7 K/W
3.0 K/W
virtual junction
output 1
output 2
case
3.0 K/W
0.7 K/W
3.0 K/W
output 3
output 4
MEA860 - 2
0.2 K/W
Fig.5 Equivalent thermal resistance network.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA8540T | 4 X 4 video switch matrix |
| TDA8540 | 4 X 4 video switch matrix |
| TDA8542AT | 2 x 1.5 W BTL audio amplifier |
| TDA8542 | 2 x 1 W BTL audio amplifier |
| TDA8542T | 2 x 1 W BTL audio amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8512J/N1,112 | 功能描述:音頻放大器 4X16W SE/BTL FLEX 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 |
| TDA8512JU | 功能描述:音頻放大器 4X16W SE/BTL FLEX CHANNEL 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 |
| TDA8540 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4 X 4 video switch matrix |
| TDA8540T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4 X 4 video switch matrix |
| TDA8540TD-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Cross-Point Switch |
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