參數(shù)資料
型號： TFA9841J
廠商： NXP SEMICONDUCTORS
元件分類： 音頻／視頻放大
英文描述： 1-channel audio amplifier
中文描述： 7.5 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM9
封裝： PLASTIC, SOT-523-1, DIL-BENT-SIL, 9 PIN
文件頁數(shù)： 12/17頁
文件大?。?/td> 121K
代理商： TFA9841J
Philips Semiconductors
TFA9841J
1-channel audio amplifier (1 x SE)
Preliminary data
Rev. 01 — 06 February 2004
12 of 17
9397 750 12014
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
At V
CC
= 18 V and R
L
= 4
the measured worst-case sine-wave dissipation is 4.4 W;
see
Figure 9
.
For T
j(max)
= 150
°
C the temperature raise, caused by the power dissipation, is:
150
60 = 90
°
C:
P
×
R
th(tot)
= 90
°
C
R
th(tot)
= 90/4.4 = 20.5 K/W
R
th(h-a)
= R
th(tot)
R
th(j-mb)
= 20.5
4.0 = 16.5 K/W.
This calculation is for an application at worst-case sine-wave output signals. In
practice music signals will be applied, which decreases the maximum power
dissipation to approximately half of the sine-wave power dissipation (see
Section 8.2.2
). This allows for the use of a smaller heatsink:
P
×
R
th(tot)
= 90
°
C
R
th(tot)
= 90/2.2 = 40.9 K/W
R
th(h-a)
= R
th(tot)
R
th(j-mb)
= 40.9
4.0 = 36.9 K/W.
14. Test information
14.1 Quality information
The General Quality Specification for Integrated Circuits, SNW-FQ-611is applicable.
External heatsink of 10 K/W; with music signals; T
amb
= 25
°
C.
Fig 13. Junction temperature as function of supply voltage for various loads.
8
150
100
50
0
12
28
VCC (V)
16
20
24
MDB800
Tj
(
°
C)
2
RL = 1
3
4
8
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TFA9841J/N1,112 功能描述:音頻放大器 1 X 7W SINGLE ENDED 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
TFA9842AJ 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:7.5 W stereo power amplifier with volume control
TFA9842AJ/N1 功能描述:音頻放大器 2X7.5W SE MPA W/VOL CTRL 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
TFA9842AJ/N1,112 功能描述:音頻放大器 2X7.5W SE MPA W/VOL 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
TFA9842BJ 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-channel audio amplifier (SE: 1 W to 7.5 W)
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