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| 型号： | TPA0103PWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 2.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封装： | GREEN, PLASTIC, HTSSOP-24 |
| 文件页数： | 29/43页 |
| 文件大小： | 1123K |
| 代理商： | TPA0103PWPG4 |
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TPA0103
1.75-W 3-CHANNEL STEREO AUDIO POWER AMPLIFIER
SLOS167A – JULY 1997 – REVISED MARCH 2000
35
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
headroom and thermal considerations
Linear 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 headroom to pass the loudest portions without distortion
as compared with the average power output. From the TPA0103 data sheet, one can see that when the
TPA0103 is operating from a 5-V supply into a 4-
speaker that 2 W RMS levels are available. Converting watts
to dB:
P
dB + 10 Log
P
W
P
ref
+ 10Log 2
1
+ 3dB
Subtracting the headroom restriction to obtain the average listening level without distortion yields:
3dB
* 15 dB +* 12 dB (15 dB headroom)
Converting dB back into watts:
P
W + 10
PdB 10
P
ref
P
W +* 12 dB + 63 mW (15 dB headroom)
This is valuable information to consider when attempting to estimate the heat dissipation requirements for the
amplifier system. Comparing the absolute worst case, which is 1.5 W of continuous power output with 0 dB of
headroom, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings for
the system. Using the power dissipation curves for a 5-V, 4-
system, the internal dissipation in the TPA0103
and maximum ambient temperatures is shown in Table 4.
Table 4. TPA0103 Power Rating, 5-V, 4-
, Three Channel
CONFIGURATION
HEADROOM
POWER DISSIPATION
TA (MAX)
CONFIGURATION
HEADROOM
2
× L/R + CENTER = TOTAL
35
°C/W
25
°C/W
Center only PO =2Wmax
0 dB
0
1.25 W
81
°C
93
°C
Center only, PO = 2 W max
15 dB
0
0.6 W
104
°C
110
°C
L/R only PO = 500 mW max
0 dB
0.6 W
0
1.2 W
83
°C
95
°C
L/R only, PO = 500 mW max
15 dB
0.2 W
0
0.4 W
111
°C
115
°C
Center, PO = 2 W max
and
0 dB
0.6 W
1.25 W
2.45 W
39
°C
63
°C
and
L/R , PO = 500 mW max
15 dB
0.2 W
0.6 W
1 W
90
°C
100
°C
The 2 W max at 0 dB is a maximum level tone that is very loud. 15 dB is a typical headroom requirement for music.
This parameter is based on a maximum junction temperature (TJ) of 125°C.
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| TPA0103PWPRG4 | 2.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA0103PWPR | 功能描述:音频放大器 1.75-W STEREO AUDIO POWER AMPLIFIER 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 |
| TPA0103PWPRG4 | 功能描述:音频放大器 1.75-W STEREO AUDIO POWER AMPLIFIER 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 |
| TPA0112 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH FOUR SELECTABLE GAIN SETTINGS |
| TPA0112EVM | 功能描述:音频 IC 开发工具 TPA0112 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 |
| TPA0112PWP | 功能描述:音频放大器 2W Stereo A 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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