LM386 LINEAR INTEGRATED CIRCUIT LOW VOLTAGE AUDIO POWER AMPLIFIER DESCRIPTION The Contek LM386 is a power amplifier, designed for use in low voltage consumer applications. The gain is internally set to 20 keep the external part count low, but the additional of external resistor and capacitor between pin 1 and pin 8 will increase the gain to any value up to 200. SOP-8 FEATURES *Minimum external parts *Wide supply voltage range: 4V~12V *Voltage gains:20~200 *Ground referenced input *Low distortion DIP-8 PIN CONFIGURATIONS Gain 1 -Input 2 +Input 3 GND 4 Contek LM386 8 Gain 7 Bypass 6 VCC 5 Output BLOCK DIAGRAM 6 VCC Contek 7 Bypass 2 -Input 50k 15k 8 Gain 1 Gain 15k 5 Output 15k 150 1.35k 3 +Input 50k 4GND Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:sales@contek-ic.com 1 LM386 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25 PARAMETER C) SYMBOL Supply Voltage Power Dissipation DIP-8 SOP-8 Input Voltage Operating Temperature Storage Temperature Vcc Pd Vi Topr Tstg ELECTRICAL CHARACTERISTICS( Ta=25 PARAMETER SYMBOL Quiescent circuit current Output Power ICCQ Po Voltage Gain GV Bandwidth BW Total harmonic distortion Input Resistance Input Bias current THD Ri IBIAS VALUE UNIT 15 1250 600 -0.4V~+0.4V 0 to 70 -40 to 150 V mW V C C C, all voltage referenced to GND unless otherwise specified) TEST CONDITIONS MIN Vi=0 Vcc=6V,THD=10% Vcc=9V,THD=10% Pin1 and pin 8 open 10mF fron pin 1 and pin 8 Pin1 and pin 8 open 10mF fron pin 1 and pin 8 Po=125mW,pin1 and pin 8 open TYP 4 325 700 26 46 300 60 0.2 50 250 250 500 Pin1 and pin 8 open MAX UNIT 8 mA mW mW dB dB kHz kHz % kW nA APPLICATION CIRCUIT Fig. 2 G V =200 Fig. 1 G V =20dB Vs Vs 6 1 2 Vin 3 10kW 8 Contek LM386 4 7 6 1 2 5 250 mF Vin 3 0.05 mF 10W 10kW Contek LM386 4 Contek Microelectronics Co.,Ltd. CONTEK http://www.contek-ic.com E-mail:sales@contek-ic.com 10 mF 8 5 7 bypass 250 mF 0.05 mF 10W 2