TLK10031 Datasheet, PDF (9/146 Pages) Texas Instruments – TLK10031 Single-Channel XAUI/10GBASE-KR Transceiver

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5.4 Thermal Information
NAME
DESCRIPTION
R_θJA
Junction-to-free air
ω_JT
Junction-to-package top
ω_JB
Junction-to-board
Custom Typical Application Board⁽¹⁾
R_θJA
ω_JT
ω_JB
Junction-to-free air
Junction-to-package top
Junction-to-board
(1) Custom Typical Application Board Characteristics:
• 10x15 inches
• 12 layer
• 8 power/ground layers – 95% copper (1oz)
• 4 signal layers – 20% copper (1oz)
SPACER
Ψ_JB = (T_J – T_B)/(Total Device Power Dissipation)
ΨJB = (TJ T_J = Device Junction Temperature
ΨJB = (TJ T_B = Temperature of PCB 1 mm from device edge.
SPACER
Ψ_JT = (T_J – T_C)/(Total Device Power Dissipation)
ΨJB = (TJ T_J = Device Junction Temperature
ΨJB = (TJ T_C = Hottest temperature on the case of the package.
TLK10031
SLLSEL3A – JULY 2015 – REVISED AUGUST 2015
VALUE
25.5
1.8
13.7
24.5
0.9
11
UNIT
°C/W
°C/W
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Specifications
9