- 您现在的位置：买卖IC网 > PDF目录98161 > TAS5111ADADRG4 (TEXAS INSTRUMENTS INC) 93 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32 PDF资料下载
参数资料
| 型号： | TAS5111ADADRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 93 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
| 封装： | GREEN, PLASTIC, HTSSOP-32 |
| 文件页数： | 5/19页 |
| 文件大小： | 447K |
| 代理商： | TAS5111ADADRG4 |
TAS5111A
SLES111 AUGUST 2005
www.ti.com
13
If this rule is observed, the TAS5111A does not have
distortion issues due to the output inductors, and
overcurrent conditions do not occur due to inductor
saturation in the output filter.
Another parameter to be considered is the idle current loss
in the inductor. This can be measured or specified as
inductor dissipation (D). The target specification for
dissipation is less than 0.05.
In general, 10-
H inductors suffice for most applications.
The frequency response of the amplifier is slightly altered
by the change in output load resistance; however, unless
tight control of frequency response is necessary (better
than 0.5 dB), it is not necessary to deviate from 10
H.
The graph in Figure 11 displays the inductance vs current
characteristics of two inductors that are recommended for
use with the TAS5111A.
Figure 11. Inductance Saturation
I Current A
4
5
6
7
8
9
10
11
0
5
10
15
L
Inductance
H
INDUCTANCE
vs
CURRENT
DBF1310A
DASL983XX1023
The selection of the capacitor that is placed across the
output of each inductor (C2 in Figure 10) is simple. To
complete the output filter, use a 0.47-
F capacitor with a
voltage rating at least twice the voltage applied to the
output stage (PVDD).
This capacitor should be a good quality polyester dielectric
such as a Wima MKS2-047ufd/100/10 or equivalent.
In order to minimize the EMI effect of unbalanced ripple
loss in the inductors, 0.1-
F, 50-V, SMD capacitors (X7R
or better) (C1A and C1B in Figure 10) should be added
from the output of each inductor to ground.
THERMAL INFORMATION
The thermally augmented package provided with the
TAS5111A is designed to be interfaced directly to a
heatsink using a thermal interface compound (for
example, Wakefield Engineering type 126 thermal
grease.) The heatsink then absorbs heat from the ICs and
couples it to the local air.
If the heatsink is carefully
designed, this process can reach equilibrium and heat can
be continually removed from the ICs. Because of the
efficiency of the TAS5111A, heatsinks are smaller than
those required for linear amplifiers of equivalent
performance.
RθJA is a system thermal resistance from junction to
ambient air. As such, it is a system parameter with roughly
the following components:
D RθJC (the thermal resistance from junction to
case, or in this instance the metal pad)
D Thermal grease thermal resistance
D Heatsink thermal resistance
RθJC has been provided in the General Information
section.
The thermal grease thermal resistance can be calculated
from the exposed pad area and the thermal grease
manufacturer’s area thermal resistance (expressed in
°C-in2/W). The area thermal resistance of the example
thermal grease with a 0.001-inch thick layer is about 0.054
°C-in2/W. The approximate exposed pad area is
0.0164 in2.
Dividing the example thermal grease area resistance by
the area of the pad gives the actual resistance through the
thermal grease, 3.3
°C/W.
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.
The following table indicates modeled parameters for one
TAS5111A IC on a heatsink. The junction temperature is
set at 110
°C in both cases while delivering 70 W RMS into
4-
loads with no clipping. It is assumed that the thermal
grease is about 0.001 inch thick (this is critical).
32-Pin TSSOP
Ambient temperature
25
°C
Power to load
70 W
Delta T inside package
12.3
°C
Delta T through thermal grease
21.1
°C
Required heatsink thermal resistance
8.2
°C/W
Junction temperature
110
°C
System RθJA
13.2
°C/W
RθJA × power dissipation
85
°C
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5111ADADR | 93 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
| TAS5111ADAD | 93 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
| TAS5111ADADG4 | 93 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
| TAS5111DADRG4 | 93 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
| TAS5111DADG4 | 93 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5111DAD | 功能描述:音频放大器 Dig 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 |
| TAS5111DADG4 | 功能描述:音频放大器 Dig 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 |
| TAS5111DADR | 功能描述:音频放大器 Dig 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 |
| TAS5111DADRG4 | 功能描述:音频放大器 Dig 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 |
| TAS5112 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DIGITAL AMPLIFIER POWER STAGE |
发布紧急采购，3分钟左右您将得到回复。