CPC7591BATR datasheet(15/17 Pages) IXYS

15 / 17 page

INTEGRATED CIRCUITS DIVISION

CPC7591

R06

www.ixysic.com

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 will activate shunting the fault current to

ground.

2.11 External Protection Elements

The CPC7591 requires only over voltage secondary

protection on the loop side of the device. The

integrated protection feature described above negates

the need for additional external protection on the SLIC

side. The secondary protector must limit voltage

transients to levels that do not exceed the breakdown

voltage or input-output isolation barrier of the

CPC7591. A foldback or crowbar type protector is

recommended to minimize stresses on the CPC7591.

Consult IXYS IC Division’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.

CPC7591BATR データシート(PDF) 15 Page - IXYS Corporation