CGY196(1999) Ver la hoja de datos (PDF) - Infineon Technologies
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CGY196 Datasheet PDF : 22 Pages
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GaAs MMIC
CGY 196
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The dissipated power is the power which remains in the chip and heats the device. It does not contain RF signals which
are coupled out consistently.
a) Continuous Wave / DC Operation
For the determination of the permissible total power dissipation Ptot-DC from the diagram below it is necessary to obtain
the temperature of the soldering point TS first. There are two cases:
• When RthSA (soldering point to ambient) is not known: Measure TS with a temperature sensor at the leads were
the heat is transferred from the device to the board ( normally at the widest source or ground lead for GaAs ). Use a
small sensor of low heat transport, for example a thermoelement ( < 1mm ) with thin wires or a temperature
indicating paper while the device is operating.
• When RthSA is already known:
TS = Pdiss x RthSA + TA
mW
1600
1400
1200
1000
800
600
400
200
0
0
Permissible Total Power Dissipation in DC Operation
Ptot DC = f (Ts)
80
25
50
75
100
125
150
175
Temperature of soldering point, Ts
°C
b) Pulsed Operation
For the calculation of the permissible pulse load Ptot-max the following formula is applicable:
• Ptot-max = Ptot-DC x Pulse factor
= Ptot-DC x ( Ptot-max / Ptot-DC )
Use the values for Ptot-DC as derived from the above diagram and for the pulse factor = Ptot-max / Ptot-DC
from the following diagram to get a specific value.
Infineon Aktiengesellschaft
3
01.3.1999
GS PD GaAs
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