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| NTE7145 Intergrated Circuit 18W BTL x 2 Ch Audio Power Amplifier Description: The NTE7145 is a stereo audio power IC in a 17-Lead Staggered SIP type package designed for car audio use. This device has 2 built-in channels to reduce the characteristics difference between L and R channels. In addition, the functions of stand-by, muting, and a variety of protections circuits are involved. Features: D High Power: POUT(1) = 18W (Typ)/Channel (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4) POUT(2) = 15W (Typ)/Channel (VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4) D Low Distortion Ratio: THD = 0.04% (Typ) (VCC = 13.2V, f = 1kHz, POUT = 1W, RL = 4, GV = 50dB) D Low Noise: VNO = 0.30mVrms (Typ) (VCC = 13.2V, RL = 4, GV = 50dB, Rg = 0, BW = 20Hz to 20kHz) D Built-In Stand-By Function (With Pin4 set at Low, Power is Turned OFF): ISB = 1A (Typ) D Built-In Muting Function (With Pin1 set at Low, Power is Turned OFF): V (Mute) = 1V (Typ) D Built-In Various Protection Circuits: Thermal Shut Down Overvoltage OUTVCC Short OUTGND Short OUT-OUT Short D Operating Supply Voltage: VCC = 9V to 18V Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Peak Supply Voltage (0.2s), VCCsurge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V DC Supply Voltage, VCCDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V OPerating Supply Voltage, VCCopr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Output Current (Peak), IO(peak) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50W Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 to +85C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C Electrical Characteristics: (TA = +25C, VCC = 13.2V, RL = 4, f = 1kHz, unless otherwise specified) Parameter Quiescent Supply Current Output Power Total Harmonic Distortion Voltage Gain Output Noise Voltage Ripple Rejection Ratio Input Resistance Output Offset Voltage Current at Stand-By State Crosstalk Pin4 Control Voltage Pin1 Control Voltage Symbol ICCQ POUT THD GV VNO RR RIN Voffset ISB CT V(SB) V(MUTE) Rg = 600, VOUT = 0.775Vrms (0dBm) Stand-ByOFF (PowerON) MuteON (PowerOFF) Pin Connection Diagram (Front View) 17 16 15 14 13 12 11 Power VCC2 Output 2 Output 1 GND 1 Test Conditions VIN = 0 VCC = 14.4V, THD = 10% THD = 10% POUT = 1W Rg = 0, BW = 20Hz to 20kHz fripple = 100Hz, Rg = 600 VIN = 0 Min - - 11 - 48 - 40 - -0.3 - - 2.5 - Typ 120 18 15 0.04 50 0.3 54 30 0 1 60 - 1.0 Max 250 - - 0.4 52 0.7 - - +0.3 10 - VCC 2.0 Unit mA W W % dB mVrms dB k V A dB V V GND 2 Output 4 Output 3 10 Power VCC1 9 Pre-VCC 8 Ripple 7 Input 2 6 NF 2 5 Pre-GND 4 Stand-By Switch 3 NF 1 2 Input 1 1 Mute Switch 1.440 (36.6) 1.180 (30.0) .197 (5.0) .154 (3.9) 1 17 .670 (17.0) .394 (10.0) .550 (14.0) .197 (5.0) .079 (2.0) .079 (2.0) .101 (2.56) |
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