LM386

Part: LM386 from Texas Instruments

Type: Low Voltage Audio Power Amplifier

Key Specs:

• Wide Supply Voltage Range: 4 V–12 V or 5 V–18 V
• Low Quiescent Current Drain: 4 mA
• Voltage Gains: 20 to 200
• Low Distortion: 0.2% (AV = 20, VS = 6 V, RL = 8 Ω, PO = 125 mW, f = 1 kHz)
• Quiescent Power Drain: 24 mW (when operating from a 6-V supply)

Features:

• Battery Operation
• Minimum External Parts
• Wide Supply Voltage Range
• Low Quiescent Current Drain
• Voltage Gains from 20 to 200
• Ground-Referenced Input
• Self-Centering Output Quiescent Voltage
• Low Distortion
• Available in 8-Pin MSOP Package

Applications:

• AM-FM Radio Amplifiers
• Portable Tape Player Amplifiers
• Intercoms
• TV Sound Systems
• Line Drivers
• Ultrasonic Drivers
• Small Servo Drivers
• Power Converters

Package:

• PDIP (8): 9.60 mm × 6.35 mm
• SOIC (8): 4.90 mm × 3.90 mm
• VSSOP (8): 3.00 mm × 3.00 mm

• Battery Operation
• Minimum External Parts
• Wide Supply Voltage Range: 4 V–12 V or 5 V–18 V
• Low Quiescent Current Drain: 4 mA
• Voltage Gains from 20 to 200
• Ground-Referenced Input
• Self-Centering Output Quiescent Voltage
• Low Distortion: 0.2% (AV = 20, VS = 6 V, RL = 8 Ω, PO = 125 mW, f = 1 kHz)
• Available in 8-Pin MSOP Package

• AM-FM Radio Amplifiers
• Portable Tape Player Amplifiers
• Intercoms
• TV Sound Systems
• Line Drivers
• Ultrasonic Drivers
• Small Servo Drivers
• Power Converters

Figure 5-1. D Package 8-Pin MSOP Top View

Table 5-1. Pin Functions

| PIN | | TYPE(1) | |--------|-----|---------|------------------------|--| | NAME | NO. | | DESCRIPTION | | GAIN | 1 | – | Gain setting pin | | –INPUT | 2 | I | Inverting input | | +INPUT | 3 | I | Noninverting input | | GND | 4 | P | Ground reference | | VOUT | 5 | O | Output | | VS | 6 | P | Power supply voltage | | BYPASS | 7 | O | Bypass decoupling path | | GAIN | 8 | – | Gain setting pin | ⁽¹⁾ I = Input, O = Output, P = Power

over operating free-air temperature range (unless otherwise noted)

| | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |-------|------------------------------|-------------------------------------------------------------------------------|-----|------|-----|------|--| | | | LM386N-1, -3, LM386M-1, LM386MM-1 | 4 | | 12 | | VS | Operating Supply Voltage | LM386N-4 | 5 | | 18 | V | | IQ | Quiescent Current | VS = 6 V, VIN = 0 | | 4 | 8 | mA | | | | VS = 6 V, RL = 8 Ω, THD = 10%
(LM386N-1, LM386M-1, LM386MM-1) | 250 | 325 | | POUT | Output Power | VS = 9 V, RL = 8 Ω, THD = 10%
(LM386N-3) | 500 | 700 | | mW | | | | VS = 16 V, RL = 32 Ω, THD = 10%
(LM386N-4) | 700 | 1000 | | | | VS = 6 V, f = 1 kHz | | 26 | | AV | Voltage Gain | 10 µF from Pin 1 to 8 | | 46 | | dB | | BW | Bandwidth | VS = 6 V, Pins 1 and 8 Open | | 300 | | kHz | | THD | Total Harmonic Distortion | VS = 6 V, RL = 8 Ω, POUT = 125 mW
f = 1 kHz, Pins 1 and 8 Open | | 0.2% | | PSRR | Power Supply Rejection Ratio | VS = 6 V, f = 1 kHz, CBYPASS = 10 μF
Pins 1 and 8 Open, Referred to Output | | 50 | | dB | | RIN | Input Resistance | | | 50 | | kΩ | | IBIAS | Input Bias Current | VS = 6 V, Pins 2 and 3 Open | | 250 | | nA |

over operating free-air temperature range (unless otherwise noted)(1)

| | | MIN | MAX | UNIT | |---------------------------|-----------------------|------|-------|------|--| | | LM386N-1/-3, LM386M-1 | | 15 | | Supply Voltage, VCC | LM386N-4 | | 22 | V | | | LM386N | | 1.25 | | Package Dissipation | LM386M | | 0.73 | W | | | LM386MM-1 | | 0.595 | | Input Voltage, VI | | –0.4 | 0.4 | V | | Storage temperature, Tstg | | –65 | 150 | °C | ⁽¹⁾ Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

over operating free-air temperature range (unless otherwise noted)

| | | LM386 | LM386 | LM386 | |-----------|----------------------------------------------|----------|-------------|----------|------| | | THERMAL METRIC(1) | D (SOIC) | DGK (VSSOP) | P (PDIP) | UNIT | | | | 8 | 8 | 8 | | RθJA | Junction-to-ambient thermal resistance | 115.7 | 169.3 | 53.4 | °C/W | | RθJC(top) | Junction-to-case (top) thermal resistance | 59.7 | 73.1 | 42.1 | °C/W | | RθJB | Junction-to-board thermal resistance | 56.2 | 100.2 | 30.6 | °C/W | | ψJT | Junction-to-top characterization parameter | 12.4 | 9.2 | 19.0 | °C/W | | ψJB | Junction-to-board characterization parameter | 55.6 | 99.1 | 50.5 | °C/W |

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

Product Folder Links: LM386