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EN/LZT 146 033 R1D Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Reliability
The Mean Time Between Failure (MTBF) of the PKB 4000 series
DC/DC converter family is calculated to be greater than (>) 3.7
million hours at full output power and a PCB temperature of
+90°C using the Ericsson failure rate data system (TILDA/
Preditool). The Ericsson failure rate data system is based on field
failure rates and is continuously updated. The data corresponds
to actual failure rates of components used in Information
Technology and Telecom equipment in temperature controlled
environments (TA= -5...+65°C). The data is considered to have
a confidence level of 90%. For more information please refer to
Design Note 002.
The PKB 4000 Series DC/DC converters are intended for
through hole mounting on a PCB. When wave soldering is
used max temperature on the pins are specified to 215°C for 10
seconds. Maximum preheat rate of 4°C/s is suggested. When
hand soldering is used a thermocouple needs to be mounted on
the DC/DC converter pins to verify that pin temperatures does
not exceed 215°C for longer time than 10 seconds with the used
soldering tools.
No-clean flux is recommended to avoid entrapment of cleaning
fluids in cavities inside of the DC/DC power module. The
residues may affect long time reliability and isolation voltage.
Soldering Information
Delivery Package Information
PKB 4000 series standard delivery package is a 100 pcs box.
(one box contains 5 full clamshells)
Clamshell Specication
Material:
PET
Max surface resistance:
1012 Ohm/sq
Color:
Transparent
Capacity:
20 pcs/clamshell
Weight:
135 g (typ)
Design for Environment (DfE)
The PKB 4000 series DC/DC converters are planned to comply
with the RoHS directive no later than december 31st, 2004