XC888LM datasheet(140/144 Pages) INFINEON

140 / 144 page

XC886/888CLM

Package and Quality Declaration

Data Sheet

133

V0.9, 2006-12

Package and Quality Declaration

Chapter 5 provides the information of the XC886/888 package and reliability section.

5.1

Package Parameters

Table 1 provides the thermal characteristics of the package used in XC886 and XC888.

Table 1

Thermal Characteristics of the Packages

Parameter

Symbol

Limit Values

Unit

Notes

Min.

Max.

PG-TQFP-48 (XC886)

Thermal resistance junction

case

1) The thermal resistances between the case and the ambient (

TCA) , the lead and the ambient (RTLA) are to be

combined with the thermal resistances between the junction and the case (

TJC), the junction and the lead

(

TJL) given above, in order to calculate the total thermal resistance between the junction and the ambient

(

TJA). The thermal resistances between the case and the ambient (RTCA), the lead and the ambient (RTLA)

depend on the external system (PCB, case) characteristics, and are under user responsibility.

The junction temperature can be calculated using the following equation:

J=TA+RTJA × PD, where the RTJA is

the total thermal resistance between the junction and the ambient. This total junction ambient resistance

TJA

can be obtained from the upper four partial thermal resistances, by

a) simply adding only the two thermal resistances (junction lead and lead ambient), or

b) by taking all four resistances into account, depending on the precision needed.

TJC

CC -

K/W

Thermal resistance junction

lead

TJL

CC -

32.5

K/W

PG-TQFP-64 (XC888)

Thermal resistance junction

case

TJC

CC -

12.6

K/W

Thermal resistance junction

lead

TJL

CC -

33.4

K/W

XC888LM Datasheet(PDF) 140 Page - Infineon Technologies AG

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