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TDA7480 Datasheet(PDF) 3 Page - STMicroelectronics |
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TDA7480 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 10 page ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±14V; RL = 8Ω; RS = 50Ω; Rf = 12K Ω; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; Tamb = 25°C unless otherwise specified.) Symbol Parameter Test Condition Min. Typ. Max. Unit VS Supply Range ±10 ±16 V Iq Total Quiescent Current RL = ∞; NO LC Filter 25 40 mA VOS Output Offset Voltage Play Condition –50 +50 mV PO Output Power THD = 10% THD = 1% 8.5 6 10 7 W W RL = 4 Ω VCC = ±10.5V THD = 10% THD = 1% 10 7 W W Pd (*) Dissipated Power at 1W Output Power Rf = 12K Ω PΟ = 1W 1 W PDMAX Maximum Dissipated Power PΟ = 10W THD 10% Rth-j-amb = 38°C/W (Area 12cm 2) 1.8 W η Efficiency ≡ PO PO + PD ≡ PO PI (**) THD 10% Rth-j-amb = 38°C/W (Area 12cm 2) 80 85 % THD Total Harmonic Distortion RL = 8 Ω; PO = 0.5W 0.1 % Imax Overcurrent Protection Threshold RL = 0 3.5 5 A Tj Thermal Shut-down Junction Temperature 150 °C GV Closed Loop Gain 29 30 31 dB eN Total Input Noise A Curve f = 20Hz to 22KHz 7 12 µV µV Ri Input Resistance 20 30 K Ω SVR Supply Voltage Rejection f = 100Hz; Vr = 0.5 46 60 dB Tr, Tf Rising and Falling Time 50 ns RDSON Power Transistor on Resistance 0.4 Ω FSW Switching Frequency 100 120 140 KHz FSW_OP Switching Frequency Operative Range 100 200 KHz BF Zero Signal Frequency Constant (***) 1.4x10 9 Hz Ω RF Frequency Controller Resistor Range (****) 712 14 K Ω MUTE & STAND-BY FUNCTIONS VST-BY Stand-by range 0.8 V VMUTE Mute Range 1.8 2.5 V VPLAY Play Range (1) 4 V AMUTE Mute Attenuation 60 80 dB IqST-BY Quiescent Current @ Stand-by 3 5 mA *: The output average power when the amplifier is playing music can be considered roughly 1/10 of the maximum output power. So it is useful to consider the dissipated power in this condition for thermal dimensioning. **: PO = measured across the load using the following inductor: COIL 58120 MPPA2 (magnetics) TURNS: 28 ∅ 1mm COIL77120 KOOL M µ (magnetics) TURNS: 28 ∅ 1mm ***: The zero-signal switching frequency can be obtained using the following expression: FSW = BF/RF ****: The maximum value of RF is related to the maximum possible value for the voltage drop on RF itself. (1): For V12 >5.2V, an input impedance of 10K Ω is to be considered. TDA7480 3/10 |
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