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參數資料
| 型號： | TDA7491LP |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封裝： | ROHS COMPLIANT, SSOP-36 |
| 文件頁數： | 26/34頁 |
| 文件大?。?/td> | 882K |
| 代理商： | TDA7491LP |
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Applications information
TDA7491LP
32/34
Doc ID 13541 Rev 4
7.9
Heatsink requirements
A thermal resistance of 24 °C/W can be obtained using the PCB copper ground layer with
16 vias connecting it to the contact area for the exposed pad. Ensure that the copper ground
area is a nominal 9 cm2 for 24 °C/W.
As with most amplifiers, the power dissipated within the device depends primarily on the
supply voltage, the load impedance and the output modulation level.
The maximum estimated power dissipation for the TDA7491LP is less than 2 W. When
properly mounted on the above PCB the junction temperature could increase by 48 °C.
However, with a musical program the dissipated power is about 40% less than this, leading
to a temperature increase of around only 30 °C. So even at the maximum recommended
ambient temperature for consumer applications there is still a clear safety margin before the
maximum junction temperature is reached.
Figure 44.
Power derating curves for PCB used as heatsink
0
1
2
3
4
5
6
7
8
0
20
40
60
80
100
120
140
160
g
Pd (W)
Tamb ( °C)
Copper Area 2x2 cm
and via holes
TDA7491P
PSSO36
Copper Area 3x3 cm
and via holes
TDA7491LP
PowerSSO-36
相關PDF資料 |
PDF描述 |
|---|---|
| TDA7491MV13TR | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491MV | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491P13TR | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA7491P | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDA749213TR | 50 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA7491LP13TR | 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio Amp 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 |
| TDA7491MV | 功能描述:音頻放大器 25W Mono BTL Class-D 4-Select dB 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 |
| TDA7491MV13TR | 功能描述:音頻放大器 25W Mono BTL Class-D 4-Select dB 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 |
| TDA7491P | 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio Amp 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 |
| TDA7491P13TR | 功能描述:音頻放大器 20W Dual BTL Class D 18V VCC Audio Amp 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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