NTE1112 Integrated Circuit Audio Power Amplifier, 4W @ 24V Description: The NTE1112 is an integrated monolithic circuit in a 14−lead DIP plastic package with external heat− sink. Features: D Output Power 2.2W (18V−16Ω) D Low Quiescent Output Current D High Efficiency Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27V Input Voltage (Note 1), Vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V to 27V Output Peak Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A Power Dissipation (Tamb = 25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.35W Storage and Junction Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55 to +150°C Thermal Resistance Junction−Case, Rth j−case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17°C/W Thermal Resistance Junction−Ambient, Rth j−amb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93°C/W Note 1. For V < 27V, Vimax = Vs Electrical Characteristics: (Tamb = +25°C unless otherwise specified) Parameter Total Quiescent Drain Current Symbol Id Test Conditions Min Typ Max Unit Vs = 12V − 5.0 − mA Vs = 18V − 6.2 − mA Vs = 12V − 2.0 − mA Vs = 18V − 2.5 − mA − 175 − mA − 180 − nA Vs = 12V, RL = 8Ω − 1.0 − W Vs = 18V, RL = 16Ω − 1.7 − W Vs = 24V, RL = 50Ω − 1.25 − W Vs = 12V, RL = 8Ω 1.0 1.4 − W Vs = 18V, RL = 16Ω − 2.2 − W − 15 − kΩ Quiescent Drain Current of Output Transistors Id Drain Current Id d = 10% Input Bias Current Ib Vs = 18V Output Power PO d = 3% d = 10% Internal Feedback Resistance RF RL = 16Ω, PO = 2.2W, VS = 18V Electrical Characteristics (Cont’d): (Tamb = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Input Impedance Zi Vs = 18V − 150 − kΩ Distortion d Po = 50mW, f = 1kHz, RL = 16Ω, Vs = 18 − 0.1 − % RF = 0, RL = 16Ω, Vs = 18V − 72 − dB Voltage Gain GV Pin Connection Diagram (Front View) Output 1 14 VCC N.C. 2 13 N.C. GND 3 12 Compensation N.C. 4 11 N.C. GND 5 10 Feedback N.C. 6 9 N.C. Input 7 8 Ripple Bypass 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