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TDA2006 参数 Datasheet PDF下载

TDA2006图片预览
型号: TDA2006
PDF下载: 下载PDF文件 查看货源
内容描述: 12W音频放大器 [12W AUDIO AMPLIFIER]
分类和应用: 商用集成电路音频放大器局域网
文件页数/大小: 12 页 / 195 K
品牌: STMICROELECTRONICS [ ST ]
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TDA2006  
SHORT CIRCUIT PROTECTION  
Figure 19 : Safe Operating Area and Collector  
Characteristics of the Protected  
Power Transistor  
The TDA2006 has an original circuit which limits  
the current of the output transistors. Figure 18  
shows that the maximum output current is a func-  
tion of the collector emitter voltage ; hence the  
output transistors work within their safe operating  
area (Figure 19).  
This functioncan thereforebe considered as being  
peak power limiting rather than simple current lim-  
iting.  
It reduces the possibility that the device gets dam-  
aged during an accidental short circuit from AC  
output to ground.  
THERMAL SHUT DOWN  
The presence of a thermal limiting circuit offers the  
following advantages :  
1) an overload on the output (even if it is  
permanent), or an above limit ambient  
temperature can be easily supported since the  
Tj cannot be higher than 150°C.  
Figure 20 : Output Power and Drain Current ver-  
sus Case Temlperature (RL = 4)  
2) the heatsink can have a smaller factor of safety  
compared with that of a conventional circuit.  
There is no possibility of device damage due to  
high junction temperature.  
If for any reason, the junction temperature in-  
creases up to 150 °C, the thermalshutdown simply  
reduces the power dissipation andthe current con-  
sumption.  
The maximum allowable power dissipation de-  
pends upon the size of the external heatsink (i.e.  
its thermal resistance) ; Figure 22 shows the dissi-  
pable power as a function of ambient temperature  
for different thermal resistances.  
Figure 18 : Maximum Output Current versus  
Voltage VCE (sat) accross each Out-  
put Transistor  
Figure 21 : Output Power and Drain Current ver-  
sus Case Temlperature (RL = 8)  
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