LM391 Audio Power Driver

Absolute Maximum Ratings
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Supply Voltage
LM391N-100
Input Voltage
Shutdown Current (Pin 14)
g50V or a100V
Supply Voltage less 5V
1 mA
Package Dissipation (Note 1)
Storage Temperature
Operating Temperature
Lead Temp (Soldering 10 sec)
Thermal Resistance
i JC
i JA
139W
b65Ctoa150C
0Ctoa70C
260C
20CW
63CW
Electrical Characteristics T A e 25C (The following are for V a e 90% V a MAX and V b e 90% V b MAX)
Parameter Conditions Min Typ Max Units
Quiescent Current Current in Pin 15
mA
LM391N-100 V IN e 0 5 6
Output Swing Positive V a b 7 V a b 5 V
Negative V b a 7 V b a 5 V
Drive Current Source (Pin 8) 5 mA
Sink (Pin 5) 5 mA
Noise (20 Hz–20 kHz) Input Referred 3 mV
Supply Rejection Input Referred 70 90 dB
Total Harmonic Distortion f e 1 kHz 001 %
f e 20 kHz 010 025 %
Intermodulation Distortion 60 Hz 7 kHz 41 001 %
Open Loop Gain f e 1 kHz 1000 5500 VV
Input Bias Current 01 10 mA
Input Offset Voltage 5 20 mV
Positive Current Limit V BE Pin 10–9 650 mV
Negative Current Limit V BE Pin 9–13 650 mV
Positive Current Limit Bias Current Pin 10 10 100 mA
Negative Current Limit Bias Current Pin 13 10 100 mA
Pin 14 Current Comments
Minimum pin 14 current required for shutdown is 05 mA and must not exceed 1 mA
Maximum pin 14 current for amplifier not shut down is 005 mA
The typical shutdown switch point current is 02 mA
Note 1 For operation in ambient temperatures above 25C the device must be derated based on a 150C maximum junction temperature and a thermal resistance
of 90CW junction to ambient
Typical Applications
FIGURE 1 LM391 with External ComponentsProtection Circuitry Not Shown
TLH7146–3
2