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參數資料
| 型號： | TPA1517NEE4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-20 |
| 文件頁數： | 7/22頁 |
| 文件大小： | 540K |
| 代理商： | TPA1517NEE4 |
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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| TPA152D | 功能描述:音頻放大器 75mW RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA152DG4 | 功能描述:音頻放大器 Hi-Fi Stereo Headphone RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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