EL2386CSZ datasheet(11/13 Pages) RENESAS

11 / 13 page

EL2386

FN7155 Rev 1.00

Page 11 of 13

June 24, 2004

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:

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:

where:

VS = Supply voltage

ISMAX = Maximum supply current of 1 amplifier

VOUTMAX = Max. output voltage of the application

RL = Load resistance

FIGURE 2.

TJMAX

TMAX JA*n*PDMAX



PDMAX

2VS *ISMAX



 +

-VOUTMAX

*VOUTMAX RL





EL2386CSZ Datasheet(PDF) 11 Page - Renesas Technology Corp