150°C ± 125°C

109.1°C/W

= 0.23W

150°C ± 125°C

161.1°C/W

= 0.16W

150°C ± 25°C

109.1°C/W

= 1.15W

150°C ± 25°C

161.1°C/W

= 0.78W

R

TJA

LM7332

SNOSAV4B – APRIL 2008 – REVISED JANUARY 2016

www.ti.com

Output Short Circuit Current and Dissipation Issues (continued)

The operational amplifier quiescent power dissipation is calculated by Equation 6:

where

•

•

(6)

The DC load power is calculated by Equation 7:

where

•

•

(7)

Table 1 shows the maximum AC component of the load power dissipated by the operational amplifier for

standard sinusoidal, triangular, and square waveforms:

Table 1. Normalized AC Power Dissipated in the Output Stage for Standard

Waveforms

SINUSOIDAL

TRIANGULAR

SQUARE

V supplies, a 600-

Ω load, and triangular waveform power dissipation in the output stage is calculated as:

(8)

The maximum power dissipation allowed at a certain temperature is a function of maximum die junction

(9)

For the LM7332, the maximum junction temperature allowed is 150°C at which no power dissipation is allowed.

The power capability at 25°C is given by Equation 10 and Equation 11.

For VSSOP package:

(10)

For SOIC package:

(11)

Similarly, the power capability at 125°C is given by Equation 12 and Equation 13.

For VSSOP package:

(12)

For SOIC package:

(13)

24

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