VOLTAGE AUDIO POWER AMPLIFIER LINEAR INTEGRATED CIRCUIT DESC

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VOLTAGE AUDIO POWER AMPLIFIER LINEAR INTEGRATED CIRCUIT DESC

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UNISONIC TECHNOLOGIES CO., LM386
VOLTAGE AUDIO POWER AMPLIFIER
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
LM386 power amplifier, designed voltage consumer applications. gain internally keep external part count low, addition external resistor capacitor between will increase gain value from 200. inputs ground referenced while output automatically biases one-half supply voltage.The quiescent power drain only milliwatts when operating from voltage supply, making LM386 ideal battery operation.
TSSO
DIP-8
FEATURES
*Battery operation *Minimum external parts *Wide supply voltage range: 4V~12V *Low quiescent current drain:4mA *Voltage gains:20~200 *Ground referenced input *Self-centering output quiescent voltage *Low distortion:0.2%(Av =20,Vs=6V,RL=8,Po=125mW,f=1kHz)
*Pb-free plating product number:LM386L
ORDERING INFORMATION Order Number Normal Lead Free Plating LM386-S08-R LM386L-S08-R LM386-S08-T LM386L-S08-T LM386-P08-R LM386L-P08-R LM386-P08-T LM386L-P08-T LM386-D08-T LM386L-D08-T Package SOP-8 SOP-8 TSSOP-8 TSSOP-8 DIP-8 Packing Tape Reel Tube Tape Reel Tube Tube
www.unisonic.com.tw Copyright 2005 Unisonic Technologies Co.,
QW-R107-007,F
LM386
CONFIGURATION
LINEAR INTEGRATED CIRCUIT
Gain
Gain
-Input
Bypass
LM386
+Input
Output
BLOCK DIAGRAM
GAIN GAIN -INPUT 1.35K +INPUT
BYPASS
VOUT
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R107-007.
LM386
ABSOLUTE MAXIMUM RATINGS
PARAMETER Supply Voltage Input Voltage SYMBOL
LINEAR INTEGRATED CIRCUIT
RATINGS UNIT -0.4V +0.4V DIP-8 1250 Power Dissipation SOP-8 TSSOP-8 Operating Temperature TOPR Junction Temperature +125 Storage Temperature TSTG +150 Note:1. Absolute maximum ratings stress ratings only functional device operation implied. device could damaged beyond Absolute maximum ratings. device guaranteed meet performance specifications within 0~70 operating temperature range assured design from -20~85.
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified.)
PARAMETER Operating Supply Voltage Quiescent Current Output Power Voltage Gain Bandwidth Total Harmonic Distortion Rejection Ratio Input Resistance Input Bias Current SYMBOL POUT IBIAS TEST CONDITIONS Vss=6V, VIN=0 Vss=6V, RL=8, THD=10% Vss=9V, RL=8, THD=10% Vss=6V, f=1kHz 10µF from Vss=6V Pin1 open POUT=125mW, Vs=6V,f=1kHz RL=8 pin1 open Vss=6V, f=1kHz, CBYPASS=10µF pin1and open, Referred output Vss=6V Pin2 open UNIT
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R107-007.
LM386
APPLICATION NOTES
LINEAR INTEGRATED CIRCUIT
GAIN CONTROL make LM386 more versatile amplifier, pins(1and provided gain control. With pins open 1.35 resistor sets gain 20(26dB),If capacitor from 8,bypassing 1.35 resistor, gain will 200(46dB).If resistor placed series with capacitor, gain value from 200.Gain control also done capacitively coupling resistor FET) from ground. Additional external components placed parallel with internal feedback resistors tailor gain frequency response individual applications. example compensate poor speaker bass response frequency shaping feedback path. This done with series from (paralleling internal resistor). effective bass boost: R=15 lowest value good stable operation R=10 open, pins bypassed then used. This restriction because amplifier only compensated closed-loop gains greater than INPUT BIASING schematic shows that both inputs biased ground with resistor. base current input transistors about 250nA, inputs about 12.5mW when left open. source resistance driving LM386 higher than will contribute very little additional offset (about 2.5mW input, 50mW output).If source resistance less than k,then shorting unused input ground will keep offset (about 2.5mV input,50 output).For source resistances between these values eliminate excess offset putting resistor from unused input ground, equal value source resistance. course offset problems eliminated input capacitively coupled. When using LM386 with higher gains (bypassing 1.35 resistor between pins 8)it necessary bypass unused input, preventing degradation gain possible instabilities. This done with 0.1µF capacitor short ground depending source resistance driven input.
TYPICAL APPLICATIONS CIRCUIT
Amplifier with Gain=20 Minimum Parts 250µF 0.05µF Amplifier with Gain=200 250µF 0.05µF
BYPASS
10µF
Amplifier with Gain=50
Distortion Power Wienbridge Oscillator
1.2K
10µF 250µF 0.05µF ELDEMA CF-S-2158 3V-15mA f=1kHz 4.7K
10µF
BYPASS
50µF
0.05µF
BYPASS
0.01µF
0.01µF
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R107-007.
LM386
TYPICAL APPLICATIONS CIRCUIT(cont.)
Amplifier with Bass Boost
LINEAR INTEGRATED CIRCUIT
Square Ware Oscillator
BYPASS
0.033µF
250µF 0.1µF f=1kHz 50µF
0.05µF
Radio Power Amplifier
0.05µ
FROM DETECTOR
+10µ
2200pF
FERRITE BEAD
250µ SPEAKER 0.05µ
Note Twist Supply lead supply ground very tightly. Note Twist speaker lead ground very tightly. Note Ferrite bead Ferroxcube K5-001-001/3B with turns wire. Note R1C1 band limits input signals. Note components must spaced very closely
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R107-007.
LM386
TYPICAL CHARACTERISTICS
Quiescent Supply Current Supply Voltage
LINEAR INTEGRATED CIRCUIT
Power Supply Rejection Ratio(Referred Output) Frequency C7=50µF
Power Supply Rejection (dB)
Supply Current (mA)
10µF BYPASSCAPACITOR 0.5µF Vs=6V Av=26dB
100K
Supply Voltage(volts) Peak-to -Peak Output Voltage Swing Supply Voltage
Frequency (Hz) Frequency Response With Bass Boost
Output Voltage (Volts Peak-To-Peak)
Voltage Gain (dB)
Supply Voltage(volts)
Frequency (Hz)
Voltage Gain Frequency
Distortion Frequency Vs=6V OUT=125mW Av=26dB(C1.8=0)
C1.8
100K
Total Harmonic Distortion
C1.8=10µF
Voltage Gain (dB)
Frequency (Hz)
10K20K
Frequency (Hz)
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R107-007.
LM386
TYPICAL CHARACTERISTICS(cont.)
Distortion Output Power 0.001 0.01 Power Output (Watts) Vs=6V f=1kHz
LINEAR INTEGRATED CIRCUIT
Device Dissipaton Output Power 4Load
Total Harmonic Distortion
Device Dissipation
Vs=6V LEVEL Vs=9V Vs=12V LEVEL
Output Power Device Dissipaton Output Power -16Load LEVEL
Device Dissipaton Output Power 8Load LEVEL
Vs=16V
Device Dissipation
Vs=16V
Device Dissipation
Vs=12V LEVEL Vs=9V Vs=6V
Vs=12V Vs=9V
Vs=6V Output Power
LEVEL
Output Power
assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications products described contained herein. products designed life support appliances, devices systems where malfunction these products reasonably expected result personal injury. Reproduction whole part prohibited without prior written consent copyright owner. information presented this document does form part quotation contract, believed accurate reliable changed without notice.
UNISONIC TECHNOLOGIES CO.,
www.unisonic.com.tw
QW-R107-007.

VOLTAGE AUDIO POWER AMPLIFIER LINEAR INTEGRATED CIRCUIT DESC

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