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參數(shù)資料
| 型號： | TAS5112ADFD |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| 封裝： | GREEN, PLASTIC, HTSSOP-56 |
| 文件頁數(shù)： | 9/29頁 |
| 文件大小： | 762K |
| 代理商： | TAS5112ADFD |
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TAS5112A
SLES094B - OCTOBER 2003 - REVISED JUNE 2008
www.ti.com
17
Heatsink thermal resistance is generally predicted by the
heatsink vendor, modeled using a continuous flow
dynamics (CFD) model, or measured.
Thus, for a single monaural IC, the system RθJA = RθJC +
thermal grease resistance + heatsink resistance.
and
indicate
modeled
parameters for one or two TAS5112A ICs on a single
heatsink. The final junction temperature is set at 110
°C in
all cases. It is assumed that the thermal grease is 0.002
inch thick and that it is similar in performance to Wakefield
Type 126 thermal grease. It is important that the thermal
grease layer is
≤0.002 inches thick and that thermal pads
or tape are not used in the pad-to-heatsink interface due
to the high power density that results in these extreme
power cases.
Table 4. Case 1 (2
× 50 W Unclipped Into 6 ,
Both Channels in Same IC) (1)
56-Pin HTSSOP
Ambient temperature
25
°C
Power to load (per channel)
50 W (unclipped)
Power dissipation
4.5 W
Delta T inside package
10.2
°C, note 2 ×
channel dissipation
Delta T through thermal grease
37.1
°C, note 2 ×
channel dissipation
Required heatsink thermal resistance
4.2
°C/W
Junction temperature
110
°C
System RθJA
19
°C/W
RθJA * power dissipation
85
°C
Junction temperature
85
°C + 25°C = 110°C
(1) This case represents a stereo system with only one package. See
Case 2 and Case 2A if doing a full-power, 2-channel test in a
multichannel system.
Table 5. Case 2 (2
× 50 W Unclipped Into 6 ,
Channels in Separate Packages) (1)
56-Pin HTSSOP
Ambient temperature
25
°C
Power to load (per channel)
50 W (unclipped)
Power dissipation
4.5 W
Delta T inside package
5.1
°C
Delta T through thermal grease
18.6
°C
Required heatsink thermal resistance
6.9
°C/W
Junction temperature
110
°C
System RθJA
19
°C/W
RθJA * power dissipation
85
°C
Junction temperature
85
°C + 25°C = 110°C
(1) In this case, the power is separated into two packages. Note that
this allows a considerably smaller heatsink because twice as much
area is available for heat transfer through the thermal grease. For
this reason, separating the stereo channels into two ICs is
recommended in full-power stereo tests made on multichannel
systems.
Table 6. Case 2A (2
× 60 W Into 6 , Channels in
Separate IC Packages) (1)
56-Pin HTSSOP
Ambient temperature
25
°C
Power to load (per channel)
60 W (10% THD)
Power dissipation per channel
5.4 W
Delta T inside package
6.1
°C, note 2 ×
channel dissipation
Delta T through thermal grease
22.3
°C, note 2 ×
channel dissipation
Required heatsink thermal resistance
5.3
°C/W
Junction temperature
110
°C
System RθJA
15.9
°C/W
RθJA * power dissipation
85
°C
Junction temperature
85
°C + 25°C = 110°C
(1) In this case, the power is also separated into two packages, but
overdriving causes clipping to 10% THD. In this case, the high
power requires extreme care in attachment of the heatsink to
ensure that the thermal grease layer is
≤ 0.002 inches thick. Note
that this power level should not be attempted with both channels in
a single IC because of the high power density through the thermal
grease layer.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TAS5112ADFDG4 | 功能描述:音頻放大器 Digital Amp Power Stage 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 |
| TAS5112ADFDR | 功能描述:音頻放大器 Digital Amp Power Stage 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 |
| TAS5112ADFDRG4 | 功能描述:音頻放大器 Digital Amp Power Stage 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 |
| TAS5112DFD | 功能描述:音頻放大器 Dig Amp Stereo Power Stage 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 |
| TAS5112DFDG4 | 功能描述:音頻放大器 Dig Amp Stereo Power Stage 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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