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TDA7245A Datasheet(PDF) 3 Page - STMicroelectronics |
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TDA7245A Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 6 page ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Tamb =25 °C, VS = 16.5V, RL =4Ω,f = 1kHz; unless otherwise specified). Symbol Parameter Test Condition Min. Typ. Max. Unit VS Supply Voltage 12 30 V VO Quiescent Output Voltage VS = 24V 11.6 V Id Quiescent Drain Current VS = 28V 24 35 mA PO Output Power d = 1% VS = 16.5V, RL =4 Ω VS = 20V, RL =8 Ω d = 10% VS = 16.5V, RL =4 Ω VS = 20V, RL =8 Ω Music Power (*) VS = 24V, d = 10%, RL =4 Ω 6.5 6 5 7.5 6.5 16 W W W W W d Harmonic Distortion PO = 50mW to 4W f = 1KHz f = 10KHz VS = 20V, RL =8 Ω, PO = 50mW to 3.5W f = 1KHz f = 10KHz 0.15 0.8 0.12 0.5 0.5 % % % % RI Input Impedance f = 1kHz 30 K Ω BW Small signal bandwidth (-3dB) PO = 1W 20 to 40,000 Hz GV Voltage Gain (open loop) f = 1KHz 75 dB GV Voltage Gain (closed loop) f = 1KHz 39 40 41 dB eN Total Input Noise B = 22 - 22,000Hz Rs =50 Ω Rs =1k Ω Rs = 10k Ω 1.7 2 36 mV µV µV S/N Signal to Noise Ratio PO =5W; RS = 10K Ω 86 dB SVR Supply Voltage Rejection VS = 16.5V; RL =8 Ω; f = 100Hz Rs = 10k Ω; Vr = 0.5Vrms 38 45 dB Tsd Thermal shut-down Junction Temperature 150 °C STAND-BY FUNCTION Symbol Parameter Test Condition Min. Typ. Max. Unit Vst-by Pin 5 DC Voltage SW1 Open (play) 6.4 V Ist-by Pin 5 Current SW1 Closed (st-by) 160 280 µA ATTst-by Stand-by Attenuation f = 1kHz 70 90 dB Vt Stand-by Threshold (pin 5) 3.8 V Id st-by Quiescent Current @ Stand-by 2 4 mA Note (*): MUSIC POWER CONCEPT MUSIC POWER is ( according to the IEC clauses n.268-3 of Jan 83) the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz. According to this definition our method of measurement comprises the following steps: 1) Set the voltage supply at the maximum operating value -20% 2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses is > 60 sec 3) The output voltage is measured 1 sec from the start of the pulse 4) Increase the input voltage until the output signal show a THD = 10% 5) The music power is then V 2 out/R1, where Vout is the output voltage measured in the condition of point 4) and R1 is the rated load impedance The target of this method is to avoid excessive dissipation in the amplifier. TDA7245A 3/6 |
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