Datasheet
V
OUT
FROM V
-
(V)
10µ 100µ
1m 10m
I
OUT
(A)
1m
10m
100m
10
V
S
= 10V
V
ID
= -20 mV
200:
2 k:
600:
1 k:
100:
20:
50:
100m
1
LM7332
www.ti.com
SNOSAV4A –APRIL 2008–REVISED MARCH 2013
Figure 51. Steady State Output Sinking Characteristics with Load Lines
OUTPUT SHORT CIRCUIT CURRENT AND DISSIPATION ISSUES
The LM7332 output stage is designed for maximum output current capability. Even though momentary output
shorts to ground and either supply can be tolerated at all operating voltages, longer lasting short conditions can
cause the junction temperature to rise beyond the absolute maximum rating of the device, especially at higher
supply voltage conditions. Below supply voltage of 6V, the output short circuit condition can be tolerated
indefinitely.
With the op amp tied to a load, the device power dissipation consists of the quiescent power due to the supply
current flow into the device, in addition to power dissipation due to the load current. The load portion of the
power itself could include an average value (due to a DC load current) and an AC component. DC load current
would flow if there is an output voltage offset, or the output AC average current is non-zero, or if the op amp
operates in a single supply application where the output is maintained somewhere in the range of linear
operation. Therefore:
P
TOTAL
= P
Q
+ P
DC
+ P
AC
P
Q
= I
S
· V
S
Op Amp Quiescent Power Dissipation
P
DC
= I
O
· (V
r
- V
o
) DC Load Power
P
AC
= See Table 1 Below AC Load Power
where:
• I
S
: Supply Current
• V
S
: Total Supply Voltage (V
+
− V
−
)
• V
O
: Average Output Voltage
• V
r
: V
+
for sourcing and V
−
for sinking current
Table 1 below shows the maximum AC component of the load power dissipated by the op amp for standard
Sinusoidal, Triangular, and Square Waveforms:
Table 1. Normalized AC Power Dissipated in the Output Stage for Standard
Waveforms
P
AC
(W.Ω/V
2
)
Sinusoidal Triangular Square
50.7 x 10
−3
46.9 x 10
−3
62.5 x 10
−3
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