欢迎访问ic37.com |
会员登录 免费注册
发布采购

CPC7582BATR 参数 Datasheet PDF下载

CPC7582BATR图片预览
型号: CPC7582BATR
PDF下载: 下载PDF文件 查看货源
内容描述: 线卡接入交换机 [Line Card Access Switch]
分类和应用:
文件页数/大小: 19 页 / 566 K
品牌: CLARE [ CLARE ]
 浏览型号CPC7582BATR的Datasheet PDF文件第11页浏览型号CPC7582BATR的Datasheet PDF文件第12页浏览型号CPC7582BATR的Datasheet PDF文件第13页浏览型号CPC7582BATR的Datasheet PDF文件第14页浏览型号CPC7582BATR的Datasheet PDF文件第15页浏览型号CPC7582BATR的Datasheet PDF文件第17页浏览型号CPC7582BATR的Datasheet PDF文件第18页浏览型号CPC7582BATR的Datasheet PDF文件第19页  
CPC7582  
If presented with a short duration transient such as a  
lightning event, the thermal shutdown feature will  
typically not activate. But in an extended power-cross  
transient, the device temperature will rise and the  
thermal shutdown will activate forcing the switches to  
the all-off state. At this point the current measured at  
pin 3 (T  
) and pin 14 (R  
) through the break  
LINE  
LINE  
switches will drop to zero. Once the device enters  
thermal shutdown it will remain in the all-off state until  
the temperature of the device drops below the de-  
activation level of the thermal shutdown circuit. This  
will permit the device to return to normal operation. If  
the transient has not passed, current will flow at the  
value allowed by the dynamic DC current limiting of  
the switches and heating will begin again, reactivating  
the thermal shutdown mechanism. This cycle of  
entering and exiting the thermal shutdown mode will  
continue as long as the fault condition persists. If the  
magnitude of the fault condition is great enough, the  
external secondary protector could activate and shunt  
all current to ground.  
The thermal shutdown mechanism of the CPC7582  
can be disabled by applying a logic high to pin 7 (T ).  
SD  
2.10 External Protection Elements  
The CPC7582 requires only overvoltage secondary  
protection on the loop side of the device. The  
integrated protection feature described above negates  
the need for protection on the line side. The secondary  
protector limits voltage transients to levels that do not  
exceed the breakdown voltage or input-output  
isolation barrier of the CPC7582. A foldback or  
crowbar type protector is recommended to minimize  
stresses on the device.  
Consult Clare’s application note, AN-100, “Designing  
Surge and Power Fault Protection Circuits for Solid  
State Subscriber Line Interfaces” for equations related  
to the specifications of external secondary protectors,  
fused resistors and PTCs.  
16  
www.clare.com  
R05  
 复制成功!