LM380

LM380 2.5W Audio Power Amplifier August 2000 LM380 2.5W Audio Power Amplifier General Description The LM380 is a power audio amplifier for consumer applications. In order to hold system cost to a minimum, gain is internally fixed at 34 dB. A unique input stage allows ground referenced input signals. The output automatically selfcenters to one-half the supply voltage. The output is short circuit proof with internal thermal limiting. The package outline is standard dual-in-line. The LM380N uses a copper lead frame. The center three pins on either side comprise a heat sink. This makes the device easy to use in standard PC layouts. 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. 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: 10V-22V Low quiescent power drain: 0.13W (VS= 18V) Voltage gain fixed at 50 High peak current capability: 1.3A Input referenced to GND High input impedance: 150kΩ 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 Connection Diagrams (Dual-In-Line Packages, Top View) 00697702 00697701 Order Number LM380N See NS Package Number N14A Order Number LM380N-8 See NS Package Number N08E © 2004 National Semiconductor Corporation DS006977 www.national.com LM380 Block and Schematic Diagrams LM380N LM380N-8 00697703 00697704 00697705 www.national.com 2 LM380 Absolute Maximum Ratings (Note 1) 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 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) 0˚C to +70˚C +150˚C +260˚C 30˚C/W 37˚C/W 79˚C/W 107˚C/W ± 0.5V −65˚C to +150˚C Electrical Characteristics (Note 2) Symbol POUT(RMS) AV VOUT ZIN THD PSRR VS BW IQ VOUTQ IBIAS ISC Gain Output Voltage Swing Input Resistance Total Harmonic Distortion Power Supply Rejection Ratio Supply Voltage Bandwidth Quiescent Supply Current Quiescent Output Voltage Bias Current Short Circuit Current Inputs Floating 8 POUT = 2W, RL = 8Ω (Notes 5, 6) (Note 3) 10 100k 7 9.0 100 1.3 25 10 RL = 8Ω Parameter Output Power Conditions RL = 8Ω, THD = 3% (Notes 4, 5) Min 2.5 40 50 14 150k 0.2 38 22 60 Typ Max Units W V/V Vp-p Ω % dB V Hz mA V nA 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 LM380 Heat Sink Dimensions 00697706 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 Device Dissipation vs Output Power — 4Ω Load 00697713 00697712 www.national.com 4 LM380 Typical Performance Characteristics Device Dissipation vs Output Power — 8Ω Load (Continued) Device Dissipation vs Output Power — 16Ω Load 00697714 00697715 Power Supply Current vs Supply Voltage Total Harmonic Distortion vs Frequency 00697716 00697717 Output Voltage Gain and Phase vs Frequency Total Harmonic Distortion vs Output Power 00697718 00697719 5 www.national.com LM380 Typical Performance Characteristics Device Dissipation vs Output Power (Continued) Supply Decoupling vs Frequency 00697720 00697721 Typical Applications Phono Amplifier 00697708 Bridge Amplifier 00697709 www.national.com 6 LM380 Typical Applications (Continued) Intercom 00697710 Phase Shift Oscillator 00697711 7 www.national.com LM380 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 www.national.com 8 LM380 2.5W Audio Power Amplifier Notes 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. For the most current product information visit us at www.national.com. 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. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. 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