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参数资料
| 型号： | TPA1517DWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封装： | GREEN, PLASTIC, SOP-20 |
| 文件页数： | 7/22页 |
| 文件大小： | 540K |
| 代理商： | TPA1517DWPG4 |
www.ti.com
1
2p60000 C
I
≤
1
2pR
L CI
≤ f
low
THERMAL APPLICATIONS
P
dB + 10Log
P
W
P
ref
+ 10Log
3.5
1
+ 5.44 dB
5.44 dB * 15 dB + * 9.56 dB (15 dB headroom)
5.44 dB * 12 dB + * 6.56 dB (12 dB headroom)
P
W + 10
PdB 10
P
ref
+ 111 mW (15 dB headroom)
+ 221 mW (12 dB headroom)
SLOS162D – MARCH 1997 – REVISED FEBRUARY 2007
APPLICATION INFORMATION (continued)
3. If low frequency response is most important and depop is not a consideration then follow:
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. Figure 19 shows that when the TPA1517 is operating from a 12-V
supply into a 4-
speaker that approximately 3.5 W peaks are possible. Converting watts to dB using the
following equation:
Subtracting dB for the headroom restriction to obtain the average listening level without distortion yields the
following:
Converting dB back into watts:
This is valuable information to consider when attempting to estimate the heat dissipation requirements for the
amplifier system. Comparing the absolute worst cast, which is 3.5 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 12-V, 4-
system, internal dissipation in the TPA1517 and
maximum ambient temperatures are shown in Table 1.
Table 1. TPA1517 Power Rating
PEAK OUTPUT POWER
POWER DISSIPATION
MAXIMUM AMBIENT
AVERAGE OUTPUT POWER
(W)
(W/Channel)
TEMPERATURE
3.5
3.5 W
2.1
-34
°C
3.5
1.77 W (3 dB)
2.4
-61
°C
3.5
884 mW (6 dB)
2.25
-48
°C
3.5
442 mW (9 dB)
1.75
-4
°C
3.5
221 mW (12 dB)
1.5
18
°C
3.5
111 mW (15 dB)
1.25
40
°C
15
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相关代理商/技术参数 |
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| TPA1517DWPRG4 | 功能描述:音频放大器 Stereo Med Power 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 |
| TPA1517NE | 功能描述:音频放大器 6W Stereo Audio 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 |
| TPA1517NEE4 | 功能描述:音频放大器 Stereo Med Power 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 |
| TPA1517NEEVM | 功能描述:音频 IC 开发工具 TPA1517NE 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 |
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