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NTE7157 Integrated Circuit Low Frequency Power Amplifier
Description: The NTE7157 is an audio power integrated circuit in a 16-Lead DIP type package with built-in two channels designed for use in a portable radio cassette tape recorder with power ON/OFF switch. Features: D High Power: POUT = 2.5W/Ch Typ (VCC = 9V, RL = 4, f = 1kHz, THD = 10%) POUT = 3.0W/Ch Typ (VCC = 9V, RL = 3, f = 1kHz, THD = 10%) D Voltage Gain: GV = 45.0dB Typ (Rf = 120, f = 1kHz) GV = 56.5dB Typ (Rf = 0, f = 1kHz) D Small Quiescent Current: ICCQ = 21mA Typ (VCC = 9V, VIN = 0) D Ripple Rejection Ratio: RR = -52dB Typ (VCC = 9V, fripple = 100Hz, Rg = 600) D Crosstalk: CT = -50dB Typ (VCC = 9V, f = 1kHz, Rg = 600) D Output Noise Voltage: Vno = 0.3mVrms Typ (VCC = 9V, Rg = 10k, BW = 20Hz to 20kHz) D Stand-By Switch D Soft Clip D Built-In Thermal Shut Down Protection Circuit D Operating Supply Voltage Range: VCC(opr) = 5V to 12V (TA = +25C) D Low Popping Noise at Power ON Absolute Maximum Ratings: (TA = +25C unless otherwise specified) DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Output Current (Peak/Ch), IO(peak) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5A Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0W Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C Note 1. Value for mounting on PC board.
Electrical Characteristics: (VCC = 9V, RL = 4, Rg = 600, f = 1kHz, TA = +25C unless otherwise specified)
Parameter Quiescent Current Output Power Total Harmonic Distortion Voltage Gain Input Resistance Output Noise Voltage Ripple Rejection Ratio Crosstalk Input Offset Voltage Stand-By Current Symbol ICCQ Pout THD GV RIN Vno RR CT V6, V7 Istb SW1 OFF
Pin Connection Diagram
Test Conditions Vin = 0 THD = 10% THD = 10%, RL = 3 Pout = 0.4W/Ch Rf = 120, Vout = 0.775Vrms (0dBm) Rf = 0, Vout = 0.775Vrms (0dBm) Rg = 10k, BW = 20Hz to 20kHz Rg = 600, fripple = 100Hz Rg = 600, Vout = 0.775Vrms (0dBm)
Min - 2.0 - - 43 - - - - - - -
Typ 21 2.5 3.0 0.2 45 56.5 30 0.3 -52 -50 30 1
Max 45 - - 1.0 47 - - 1.0 - - 60 -
Unit mA W W % dB dB k mVrms dB dB mV A
VCC2 1 Output 1 2 Bootstrap 1 3 Tab PW-GND
16 VCC1 15 Output 2 14 Bootstrap 2 Tab PW-GND
Pre-GND 6 NF 1 7 Input 1 8
11 Ripple 10 NF 2 9 Input 2
.202 (5.12) 16 1 9 8
.770 (19.5) Max
.254 (6.45)
.168 (4.26) Max
.100 (2.54)
.141 (3.6) .700 (17.78)
.138 (3.5) .300 (7.62)

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