EL2386 データシートの表示（PDF） - Renesas Electronics
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EL2386 Datasheet PDF : 13 Pages
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EL2386
FIGURE 2.
Power Dissipation
With the high output drive capability of the EL2386, it is
possible to exceed the 150°C Absolute Maximum junction
temperature under certain very high load current conditions.
Generally speaking, when RL falls below about 25, it is
important to calculate the maximum junction temperature
(TJMAX) for the application to determine if power-supply
voltages, load conditions, or package type need to be modified
for the EL2386 to remain in the safe operating area.
These parameters are calculated as follows:
TJMAX = TMAX + JA*n*PDMAX
where:
TMAX = Maximum ambient temperature
JA = Thermal resistance of the package
n = Number of amplifiers in the package
PDMAX = Maximum power dissipation of each amplifier in
the package
PDMAX for each amplifier can be calculated as follows:
PDMAX = 2 VS *ISMAX + VS-VOUTMAX*VOUTMAX RL
where:
VS = Supply voltage
ISMAX = Maximum supply current of 1 amplifier
VOUTMAX = Max. output voltage of the application
RL = Load resistance
FN7155 Rev 1.00
June 24, 2004
Page 11 of 13
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