- 您现在的位置：买卖IC网 > PDF目录98161 > TAS5112ADFD (TEXAS INSTRUMENTS INC) 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 PDF资料下载
参数资料
| 型号： | TAS5112ADFD |
| 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： | 8/29页 |
| 文件大小： | 762K |
| 代理商： | TAS5112ADFD |
第1页第2页第3页第4页第5页第6页第7页当前第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
TAS5112A
SLES094B - OCTOBER 2003 - REVISED JUNE 2008
www.ti.com
16
should remain stable within the range of peak current seen
at maximum output power and deliver at least 5
H of
inductance at 15 A.
If this rule is observed, the TAS5112A 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 13 displays the inductance vs current
characteristics of two inductors that are recommended for
use with the TAS5112A.
Figure 13. Inductance Saturation
I - Current - A
4
5
6
7
8
9
10
11
0
5
10
15
L
-
Inductance
-
H
INDUCTANCE
vs
CURRENT
DFB1310A
DASL983XX-1023
The selection of the capacitor that is placed across the
output of each inductor (C2 in Figure 12) 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 12) should be added from
the output of each inductor to ground.
THERMAL INFORMATION
The thermally augmented package provided with the
TAS5112A is designed to be interfaced directly to
heatsinks 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 TAS5112A, heatsinks can be 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 case 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 0.002-inch thick layer is about 0.1
°C-in2/W. The approximate exposed pad area is as
follows:
56-pin HTSSOP
0.045 in2
Dividing the example thermal grease area resistance by
the surface area gives the actual resistance through the
thermal grease for both ICs inside the package:
56-pin HTSSOP
2.27
°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.
Neither pads nor tape should be used with either of these
two packages. A thin layer of thermal grease with careful
clamping of the heatsink is recommended. It may be
difficult to achieve a layer 0.001-inch thick or less, so the
modeling below is done with a 0.002-inch thick layer,
which may be more representative of production thermal
grease thickness.
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5112ADCAG4 | 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| TAS5112ADCARG4 | 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| TAS5112ADCAR | 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| TAS5112ADCA | 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| TAS5112ADFDRG4 | 62 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| TAS5112DFDG4 | 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 |
发布紧急采购，3分钟左右您将得到回复。