EL2386CS 데이터 시트보기 (PDF) - Intersil

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EL2386CS

250MHz Triple Current Feedback Amplifier with Disable

Intersil 

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 25Ω, 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 + (θJA*n*PDMAX)

where:

TMAX = Maximum ambient temperature

θJA = 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

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