NTE828 Integrated Circuit Audio Power Amp, 1.5W Description: The NTE828 is an audio amplifier in a 14–Lead DIP type package designed for use in medium power consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between Pin2 and Pin6 will increase the gain to any value up to 200. The inputs are ground referenced while the output is automatically biased to one half the supply voltage. Features: D Minimum External Parts D Wide Supply Voltage Range D Ground Referenced Input D Excellent Supply Rejection D Variable Voltage Gain D Self–Centering Output Quiescent Voltage D Low Distortion D Low Voltage Operation, 4V Applications: D AM–FM Radio Amplifiers D Intercoms D TV Sound Systems D Portable Tape Player Amplifiers D Power Converters D Lamp Drivers D Ultrasonic Drivers D Line Drivers D Small Servo Drivers Absolute Maximum Ratings: Supply Voltage, VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22V Package Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3W Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.4V Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C Note 1 Pin3, Pin4, Pin5, Pin10, Pin11, and Pin12 at +25°C. Derate at 15°C/W above +25°C case. Electrical Characterisitics: (TA = 25°C unless otherwise specified) Parameter Symbol Operating Supply Voltage VS Quiescent Current IQ Output Power Min Typ 5 – 18 V – 20 35 mA VS = 12V, RL = 8Ω 1.5 2.2 – W VS = 6V, RL = 4Ω 0.6 0.8 – W VS = 12V, f = 1khz, 23 26 30 dB 10µF from Pin2 to Pin6 – 46 – dB VS = 16V, VIN = 0 POUT Voltage Gain Test Conditions AV R1 = R2 = 180Ω, THD = 10%, Note 2 Max Unit Bandwidth BW VS = 12V, Pin2 and Pin6 Open – 300 – kHz Total Harmonic Distortion THD VS = 12V, RL = 8Ω, POUT = 500mW, f = 1kHz, Pin2 and Pin6 Open – 0.1 1.0 % PSRR VS = 12V, f = 1kHz, CBYPASS = 10µF, Pin2 and Pin6 Open, Referred to Output, Note 3 – 50 – dB 10 50 – kΩ – 250 – nA Power Supply Rejection Ratio Input Resistance RIN Input Bias Current IBIAS VS = 12V, Pin7 and Pin8 Open Note 2 The amplifier should be in high gain for full swing on higher supplies due to input voltage limitations. Note 3 If load and bypass capacitor are returned to VS rather than ground, PSRR is typically 30dB. Pin Connection Diagram Bypass 1 Gain 2 GND 3 14 VS 13 Vout 12 GND GND 4 11 GND GND 5 10 GND Gain 6 9 Bootstrap (–) Input 7 8 (+) Input 14 8 1 7 .785 (19.95) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min