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参数资料
型号： TAS5112ADCARG4
厂商： TEXAS INSTRUMENTS INC
元件分类： 音频／视频放大
英文描述： 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
封装： GREEN, PLASTIC, HTSSOP-56
文件页数： 9/29页
文件大小： 762K
代理商： TAS5112ADCARG4
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.
Table 4,
Table 5,
and
Table 6
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.
相关PDF资料
PDF描述
TAS5112ADCAR 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112ADCA 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112ADFDRG4 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112ADFDR 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
TAS5112ADFDG4 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56
相关代理商/技术参数
参数描述
TAS5112ADFD 功能描述:音频放大器 Digital Amp Power Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
TAS5112ADFDG4 功能描述:音频放大器 Digital Amp Power Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
TAS5112ADFDR 功能描述:音频放大器 Digital Amp Power Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
TAS5112ADFDRG4 功能描述:音频放大器 Digital Amp Power Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
TAS5112DFD 功能描述:音频放大器 Dig Amp Stereo Power Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
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