NTE1704 Integrated Circuit Audio Power Amplifier, 1.2W Features: D Incorporating Automatic Operating Point Stabilizer D Low Noise D Variable Frequency Characteristics D Few External Components Required Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A Power Dissipation (TA = +30°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5W Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C Storage Temperatuere Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C Electrical Characteristics: (TA = +25°C, VCC = 9V, RL = 8Ω, f = 1kHz unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Circuit Current ICQ Vi = 0 10 20 50 mA Voltage Gain GVC Vi = 5mV 43 46 49 dB Output Power PO THD = 10% 0.8 1.2 – W VCC = 6V, RL = 8Ω, THD = 10% – 0.55 – W VCC = 6V, RL = 4Ω, THD = 10% – 0.9 – W Total Harmonic Distortion THD Vi = 5mV – 0.5 1.5 % Output Noise Voltage Vno Rg = 10kΩ – 0.5 1.2 mV – 25 – kΩ Input Impedance Zi Pin Connection Diagram (Front View) 9 VCC 8 Bootstrap 7 Ripple Filter 6 Ripple Filter 5 Input 4 Negative Feedback 3 Phase Compensation 2 GND 1 Output .929 (23.6) .118 (3.0) .236 (6.0) 1 9 .098 (2.5) .100 (2.54) .118(3.0)