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| 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 self-centers 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 n n n n n n n n 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: 150k Low distortion Quiescent output voltage is at one-half of the supply voltage n Standard dual-in-line package Connection Diagrams (Dual-In-Line Packages, Top View) DS006977-2 DS006977-1 Order Number LM380N See NS Package Number N14A Order Number LM380N-8 See NS Package Number N08E (c) 2000 National Semiconductor Corporation DS006977 www.national.com LM380 Block and Schematic Diagrams LM380N LM380N-8 DS006977-3 DS006977-4 DS006977-5 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 0.5V -65C to +150C Operating Temperature Junction Temperature Lead Temperature (Soldering, 10 sec.) ESD rating to be determined Thermal Resistance JC (14-Pin DIP) JC (8-Pin DIP) JA (14-Pin DIP) JA (8-Pin DIP) 0C to +70C +150C +260C 30C/W 37C/W 79C/W 107C/W 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 = 8 (Notes 5, 6) (Note 3) 10 100k 7 9.0 100 1.3 25 10 RL = 8 Parameter Output Power Conditions RL = 8, 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 % 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 = 25C unless otherwise specified. Note 3: Rejection ratio referred to the output with CBYPASS = 5 F. 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 fd on Pin 1. Note 6: The maximum junction temperature of the LM380 is 150C. Note 7: The package is to be derated at 15C/W junction to heat sink pins for 14-pin pkg; 75C/W for 8-pin. 3 www.national.com LM380 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 -- 4 Load Device Dissipation vs Output Power -- 8 Load Device Dissipation vs Output Power -- 16 Load DS006977-13 DS006977-14 DS006977-15 www.national.com 4 LM380 Typical Performance Characteristics Power Supply Current vs Supply Voltage (Continued) Total Harmonic Distortion vs Frequency Output Voltage Gain and Phase vs Frequency DS006977-16 DS006977-17 DS006977-18 Total Harmonic Distortion vs Output Power Device Dissipation vs Output Power Supply Decoupling vs Frequency DS006977-19 DS006977-20 DS006977-21 Typical Applications Phono Amplifier DS006977-8 5 www.national.com LM380 Typical Applications (Continued) Bridge Amplifier DS006977-9 Intercom DS006977-10 Phase Shift Oscillator DS006977-11 www.national.com 6 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 7 www.national.com LM380 2.5W 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: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790 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: ap.support@nsc.com 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. |
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