LM380 Audio Power Amplifier General Description The LM380 is a power audio amplifier for consumer application. In order to hold system cost to a minimum, gain is internally fixed at 34 dB. A unique input stage allows inputs to be ground referenced. The output is automatically self centering to one half the supply voltage. The output is short circuit proof with internal thermal limiting. The package outline is standard dual-in-line. A copper lead frame is used with the center three pins on either side comprising a heat sink. This makes the device easy to use in standard p-c layout. Uses include simple phonograph amplifiers, intercoms, line drivers, teaching machine outputs, alarms, ultrasonic drivers, TV sound systems, AM-FM radio, small servo drivers, power converters, etc. Connection Diagrams A selected part for more power on higher supply voltages is available as the LM384. For more information see AN-69. Features Wide supply voltage range Low quiescent power drain Voltage gain fixed at 50 High peak current capability Input referenced to GND High input impedance Low distortion Quiescent output voltage is at one-half of the supply voltage n Standard dual-in-line package n n n n n n n n (Dual-In-Line Packages, Top View) DS006977-2 DS006977-1 Order Number LM380N See NS Package Number N14A © 1999 National Semiconductor Corporation DS006977 Order Number LM380N-8 See NS Package Number N08E www.national.com LM380 Audio Power Amplifier December 1994 Block and Schematic Diagrams LM380N LM380N-8 DS006977-4 DS006977-3 DS006977-5 www.national.com 2 Absolute Maximum Ratings (Note 1) Operating Temperature Junction Temperature Lead Temperature (Soldering, 10 sec.) ESD rating to be determined Thermal Resistance θJC (14-Pin DIP) θJC (8-Pin DIP) θJA (14-Pin DIP) θJA (8-Pin DIP) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Peak Current Package Dissipation 14-Pin DIP (Note 7) Package Dissipation 8-Pin DIP (Note 7) Input Voltage Storage Temperature 22V 1.3A 8.3W 1.67W ± 0.5V −65˚C to +150˚C 0˚C to +70˚C +150˚C +260˚C 30˚C/W 37˚C/W 79˚C/W 107˚C/W Electrical Characteristics (Note 2) Symbol Parameter Conditions RL = 8Ω, THD = 3% (Notes 4, 5) POUT(RMS) Output Power AV Gain VOUT Output Voltage Swing ZIN Input Resistance THD Total Harmonic Distortion (Notes 5, 6) PSRR Power Supply Rejection Ratio (Note 3) VS Supply Voltage BW Bandwidth IQ Quiescent Supply Current VOUTQ Quiescent Output Voltage IBIAS Bias Current ISC Short Circuit Current Min Typ Max Units 50 60 V/V 2.5 40 RL = 8Ω W 14 Vp-p 150k Ω 0.2 % 38 10 POUT = 2W, RL = 8Ω V 100k 8 Inputs Floating dB 22 Hz 7 25 9.0 10 mA V 100 nA 1.3 A Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Note 2: VS = 18V and TA = 25˚C unless otherwise specified. Note 3: Rejection ratio referred to the output with CBYPASS = 5 µF. Note 4: With device Pins 3, 4, 5, 10, 11, 12 soldered into a 1/16" epoxy glass board with 2 ounce copper foil with a minimum surface of 6 square inches. Note 5: CBYPASS = 0.47 µfd on Pin 1. Note 6: The maximum junction temperature of the LM380 is 150˚C. Note 7: The package is to be derated at 15˚C/W junction to heat sink pins for 14-pin pkg; 75˚C/W for 8-pin. 3 www.national.com Heat Sink Dimensions DS006977-6 Staver Heat Sink #V-7 Staver Company 41 Saxon Ave. P.O. Drawer H Bayshore, NY 11706 Tel: (516) 666-8000 Copper Wings 2 Required Soldered to Pins 3, 4, 5, 10, 11, 12 Thickness 0.04 Inches Typical Performance Characteristics Maximum Device Dissipation vs Ambient Temperature DS006977-12 Device Dissipation vs Output Power — 4Ω Load Device Dissipation vs Output Power — 8Ω Load DS006977-13 www.national.com DS006977-14 4 Device Dissipation vs Output Power — 16Ω Load DS006977-15 Typical Performance Characteristics Power Supply Current vs Supply Voltage (Continued) Total Harmonic Distortion vs Frequency DS006977-16 Total Harmonic Distortion vs Output Power Output Voltage Gain and Phase vs Frequency DS006977-18 DS006977-17 Device Dissipation vs Output Power DS006977-19 Supply Decoupling vs Frequency DS006977-20 DS006977-21 Typical Applications Phono Amplifier DS006977-8 Bridge Amplifier DS006977-9 5 www.national.com Typical Applications (Continued) Intercom DS006977-10 Phase Shift Oscillator DS006977-11 www.national.com 6 Physical Dimensions inches (millimeters) unless otherwise noted Molded Dual-In-Line Package (N) Order Number LM380N-8 NS Package Number N08E Molded Dual-In-Line Package (N) Order Number LM380N NS Package Number N14A 7 www.national.com LM380 Audio Power Amplifier Notes LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.