- 您现在的位置：买卖IC网 > PDF目录98163 > TAS5424ATPHDRMQ1 (TEXAS INSTRUMENTS INC) 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 PDF资料下载
参数资料
| 型号： | TAS5424ATPHDRMQ1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封装： | PLASTIC, HTQFP-64 |
| 文件页数： | 33/51页 |
| 文件大小： | 1422K |
| 代理商： | TAS5424ATPHDRMQ1 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页
www.ti.com
SLOS535B – MAY 2009 – REVISED JANUARY 2010
Thermal grease thermal resistance
Heat sink thermal resistance
The thermal grease thermal resistance can be calculated from the exposed heat slug area and the thermal
grease manufacturer's area thermal resistance (expressed in °C-in2/W or °C-mm2/W). The area thermal
resistance of the example thermal grease with a 0.001-inch (0.0254-mm) thick layer is about 0.007°C-in2/W
(4.52°C-mm2/W). The approximate exposed heat slug size is as follows:
TAS5424A, 44-pin PSOP3 …………………. 0.124 in2 (80 mm2)
TAS5414A, 36-pin PSOP3 …………………. 0.124 in2 (80 mm2)
TAS5414A, TAS5424A, 64-pin QFP……….. 0.099 in2 (64 mm2)
Dividing the example thermal grease area resistance by the area of the heat slug gives the actual resistance
through the thermal grease for both parts:
TAS5424A, 44-pin PSOP3 …………………. 0.06°C/W
TAS5414A, 36-pin PSOP3 …………………. 0.06°C/W
TAS5414A, TAS5424A, 64-pin QFP……….. 0.07°C/W
The thermal resistance of thermal pads is generally considerably higher than a thin thermal grease layer.
Thermal tape has an even higher thermal resistance and should not be used at all. Heat sink thermal resistance
generally is predicted by the heat sink vendor, modeled using a continuous flow dynamics (CFD) model, or
measured.
Thus, for a single monaural channel in the IC, the system RqJA = RqJC + thermal grease resistance + heat sink
resistance.
The following table indicates modeled parameters for one TAS5414A or TAS5424A IC on a heat sink. The
junction temperature is set at 115°C in both cases while delivering 20 Wrms per channel into 4-
loads with no
clipping. It is assumed that the thermal grease is about 0.001 inches (0.0254 mm) thick.
Device
TAS5414A, 36-Pin PSOP3
Ambient temperature
25°C
Power to load
20 W × 4
Power dissipation
1.90 W × 4
ΔT inside package
7.6°C
ΔT through thermal grease
0.46°C
Required heatsink thermal resistance
10.78°C/W
Junction temperature
115°C
System RqJA
11.85°C/W
RqJA × power dissipation
90°C
Electrical Connection of Heat Slug and Heat Sink
Any heat sink that is connected to the heat slug of the TAS5414A or TAS5424A should be connected to GND or
left floating. The heat slug should never be connected to any electrical node other than GND.
Copyright 2009–2010, Texas Instruments Incorporated
39
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5424ATPHDRQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| TAS5424TDKDQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5424TDKDRQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5424TDKDQ1G4 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5424TDKDRQ1G4 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5424ATPHDRQ1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:FOUR-CHANNEL AUTOMOTIVE DIGITAL AMPLIFIERS |
| TAS5424BQ1DKDEVM | 功能描述:音频 IC 开发工具 TAS5424BQ1DKD EVAL MOD RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS5424BTDKDQ1 | 制造商:Texas Instruments 功能描述:- Trays |
| TAS5424BTDKDRQ1 | 功能描述:音频放大器 Four-CH Auto Digital Amps 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 |
| TAS5424BTDKEQ1 | 制造商:Texas Instruments 功能描述:- Trays |
发布紧急采购，3分钟左右您将得到回复。