參數(shù)資料
型號(hào)： TDA8944AJ
廠商： NXP SEMICONDUCTORS
元件分類： 音頻／視頻放大
英文描述： 7 W, 2 CHANNEL, AUDIO AMPLIFIER, PZIP17
封裝： PLASTIC, DIL-BENT-SIL, 17 PIN
文件頁(yè)數(shù)： 8/20頁(yè)
文件大小： 376K
代理商： TDA8944AJ
Philips Semiconductors
TDA8944AJ
2 x 7 W BTL audio amplier with DC gain control
Product data
Rev. 01 — 01 March 2002
16 of 20
9397 750 09433
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
At VCC = 12 V and RL =8 the measured worst-case sine-wave dissipation is 8 W;
see Figure 12. For Tj(max) = 150 °C the temperature rise - caused by the power
dissipation - is: 150
50 = 100 °C.
P
× R
th(tot) = 100 °C
Rth(tot) = 100/8 = 12.5 K/W
Rth(h-a) =Rth(tot) Rth(j-mb) = 12.5 4.5 = 8.0 K/W.
The calculation above is for an application at worst-case (stereo) 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) = 100 °C
Rth(tot) = 100/(0.5 × 8)=25K/W
Rth(h-a) =Rth(tot) Rth(j-mb) =25 4.5 = 20.5 K/W.
To increase the lifetime of the IC, Tj(max) should be reduced to 125 °C. This requires a
heatsink of approximately 14 K/W for music signals.
15. Test information
15.1 Quality information
The
“General Quality Specication for Integrated Circuits, SNW-FQ-611D” is
applicable (ordering code 9397 750 05459).
15.1.1
Test conditions
Tamb =25 °C; VCC = 12 V; f = 1 kHz; RL =8 ; audio pass band 22 Hz to 22 kHz;
unless otherwise specied.
Remark: In the graphs as function of frequency no bandpass lter was applied;
see Figure 9 and 13.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA8944AJ/N2,112 功能描述:音頻放大器 2X6W AUDIO AMP. + VOL. CONTROL 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
TDA8944J 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 7 W stereo Bridge Tied Load BTL audio amplifier
TDA8944J/N1 制造商:NXP Semiconductors 功能描述:AMP AUDIO PWR 7W STER 17SIL
TDA8944J/N1,112 功能描述:音頻放大器 7 WATT 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
TDA8944J/N1112 制造商:NXP Semiconductors 功能描述:IC AUDIO AMP AB 7W SIP-17
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