- 您现在的位置：买卖IC网 > PDF目录98274 > TPA6017A2PWPR (TEXAS INSTRUMENTS INC) 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 PDF资料下载
参数资料
| 型号： | TPA6017A2PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 15/29页 |
| 文件大小： | 575K |
| 代理商： | TPA6017A2PWPR |
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页当前第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
TPA6017A2
SLOS386A NOVEMBER 2001 REVISED APRIL 2007
22
www.ti.com
APPLICATION INFORMATION
BTL amplifier efficiency (continued)
Table 2. Efficiency vs Output Power in 5-V 8-
BTL Systems
Output Power
(W)
Efficiency
(%)
Peak Voltage
(V)
Internal Dissipation
(W)
0.25
31.4
2.00
0.55
0.50
44.4
2.83
0.62
1.00
62.8
4.00
0.59
1.25
70.2
4.47
0.53
High peak voltages cause the THD to increase.
A final point to remember about Class-AB amplifiers is how to manipulate the terms in the efficiency equation
to utmost advantage when possible. Note that in equation 6, VDD is in the denominator. This indicates that as
VDD goes down, efficiency goes up.
crest factor and thermal considerations
Class-AB power amplifiers dissipate a significant amount of heat in the package under normal operating
conditions. A typical music CD requires 12 dB to 15 dB of dynamic range, or headroom above the average power
output, to pass the loudest portions of the signal without distortion. In other words, music typically has a crest
factor between 12 dB and 15 dB. When determining the optimal ambient operating temperature, the internal
dissipated power at the average output power level must be used. From the TPA6017A2 data sheet, one can
see that when the TPA6017A2 is operating from a 5-V supply into a 3-
speaker 4-W peaks are available.
Converting watts to dB:
P
dB +
10 Log
P
W
P
ref
+ 10Log 4W
1W
+ 6dB
(7)
Subtracting the headroom restriction to obtain the average listening level without distortion yields:
6 dB 18 dB = 12 dB (18 dB crest factor)
6 dB 15 dB = 9 dB (15 dB crest factor)
6 dB 12 dB = 6 dB (12 dB crest factor)
6 dB 9 dB = 3 dB (9 dB crest factor)
6 dB 6 dB = 0 dB (6 dB crest factor)
6 dB 3 dB = 3 dB (3 dB crest factor)
Converting dB back into watts:
P
W +
10PdB 10
P
ref
+ 63 mW (18 dB crest factor)
+ 125 mW (15 dB crest factor)
+ 250 mW (12 dB crest factor)
+ 500 mW (9 dB crest factor)
+ 1000 mW (6 dB crest factor)
(8)
+ 2000 mW (3 dB crest factor)
相关PDF资料 |
PDF描述 |
|---|---|
| TPA6017A2PWP | 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| TPA6017A2PWPG4 | 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| TPA6017A2PWPRG4 | 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| TPA6020A2RGWRG4 | 2.15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
| TPA6020A2RGWR | 2.15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA6017A2PWPRG4 | 功能描述:音频放大器 Stereo Cost Eff Class-AB 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 |
| TPA6019A4PWPR | 制造商:Texas Instruments 功能描述:AUDIO AMP 制造商:TI 功能描述:STEREO BTL 1W AUDIO POWER AMPLIFIER |
| TPA6020A2 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2.8-W STEREO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
| TPA6020A2EVM | 功能描述:音频 IC 开发工具 TPA6020A2 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 |
| TPA6020A2RGW | 制造商:TI 制造商全称:Texas Instruments 功能描述:2.8-W STEREO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER |
发布紧急采购，3分钟左右您将得到回复。