參數(shù)資料
型號(hào)： TDA7491HV
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
封裝： ROHS COMPLIANT, SSOP-36
文件頁(yè)數(shù)： 33/41頁(yè)
文件大小： 820K
代理商： TDA7491HV
TDA7491HV
Application information
Doc ID 14242 Rev 4
39/41
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.
Figure 59 shows the derating curves for copper areas of 4 cm2 and 9 cm2.
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 TDA7491HV is less than 4 W. When
properly mounted on the above PCB the junction temperature could increase by 96 °C.
However, with a musical program the dissipated power is about 40% less than this, leading
to a temperature increase of around 60 °C. So even at the maximum recommended ambient
temperature for consumer applications there is still a margin of safety before the maximum
junction temperature is reached.
Figure 59.
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
TDA7491HV
PowerSSO-36
相關(guān)PDF資料
PDF描述
TDA7491HV13TR 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7491LP13TR 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7491LP 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7491MV13TR 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
TDA7491MV 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7491HV13TR 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(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7491LP 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(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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(chǎn)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(fēng)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(chǎn)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(fēng)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(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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