NTE7155 Integrated Circuit Dual Low–Voltage Power Amplifier Description: The NTE7155 is a monolithic integrated circuit in an 8–Lead DIP type package designed for use as a dual audio power amplifier in portable cassette players and radios. Features: D Supply Voltage Down To 1.8V D Low Crossover Distortion D Low Quiescent Current D Bridge or Stereo Configuration Absolute Maximum Ratings: Supply Voltage, VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Peak Output Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A Total Power Dissipation, PD TA = +50°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0W TC = +50°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4W Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100°C/W Thermal Resistance, Junction–to–Case (Pin4), RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W Electrical Charactgeristics: (VS = 6V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Stereo Supply Voltage VS 1.8 – 15 V Quiescent Output Voltage VO – 2.7 – V – 1.2 – V VS = 3V Quiescent Drain Current ID – 6 9 mA Input Bias Current IB – 100 – nA Electrical Charactgeristics (Cont’d): (VS = 6V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit VS = 9V – 300 – mW VS = 6V 90 120 – mW VS = 4.5V – 60 – mW VS = 3V 15 20 – mW VS = 2V – 5 – mW RL = 16Ω VS = 6V 170 220 – mW RL = 8Ω VS = 9V – 1000 – mW VS = 6V 300 380 – mW VS = 6V 450 650 – mW VS = 4.5V – 320 – mW VS = 3V – 110 – mW RL = 32Ω, PO = 40mW – 0.2 – % RL = 16Ω, PO = 75mW – 0.2 – % RL = 8Ω, PO = 150mW – 0.2 – % f = 1kHz 36 39 41 dB – – ±1 dB Stereo (Cont’d) Output Power (Each Channel) (f = 1kHz, d = 10%) PO RL = 32Ω RL = 4Ω Distortion (f = 1kHz) d Closed Loop Voltage Gain GV Channel Balance ∆GV Input Resistance RI Total Input Noise eN Supply Voltage Rejection Channel Separation SVR CS f = 1kHz 100 – – kΩ B = Curve A – 2.0 – µV B = 22Hz to 22kHz – 2.5 – µV f = 100Hz, C1 = C2 = 100µF 24 30 – dB f = 1kHz – 50 – dB 1.8 – 15 V RL = ∞ – 6 9 mA RL = 8Ω – – ±50 mV – 100 – nA VS = 9V – 1000 – mW VS = 6V 320 400 – mW VS = 4.5V – 200 – mW VS = 3V 50 65 – mW VS = 2V – 8 – mW VS = 9V – 2000 – mW VS = 6V – 800 – mW VS = 3V – 120 – mW VS = 6V 900 1350 – mW VS = 4.5V – 700 – mW VS = 3V – 220 – mW VS = 4.5V – 1000 – mW VS = 3V 200 350 – mW VS = 2V – 80 – mW RS = 10kΩ Bridge Supply Voltage Quiescent Drain Current Output Offset Voltage (Between Outputs) VS ID VOS Input Bias Current IB Output Power (f = 1kHz, d = 10%) PO RL = 32Ω RL = 16Ω RL = 8Ω RL = 4Ω Electrical Charactgeristics (Cont’d): (VS = 6V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit RL = 8Ω, PO = 0.5W, f = 1kHz – 0.2 – % Bridge (Cont’d) Distortion d Closed Loop Voltage Gain GV f = 1kHz – 39 – dB Input Resistance RI f = 1kHz 100 – – kΩ Total Input Noise eN RS = 10kΩ B = Curve A – 2.5 – µV B = 22Hz to 22kHz – 3.0 – µV f = 100Hz – 40 – dB RL = 8Ω, PO = 1W – 120 – kHz Supply Voltage Rejection SVR Power bandwidth (–3dB) B Pin Connection Diagram Output 1 1 8 (–) Input 1 Supply Voltage 2 Output 2 3 7 (+) Input 1 6 (+) Input 2 GND 4 5 (–) Input 2 8 5 .260 (6.6) Max 1 4 .430 (10.92) Max .300 (7.62) .200 (5.08) .125 (3.18) Min .100 (2.54) .300 (7.62)