Datenblatt-Suchmaschine für elektronische Bauteile |
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TDA7384A Datenblatt(PDF) 7 Page - STMicroelectronics |
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TDA7384A Datenblatt(HTML) 7 Page - STMicroelectronics |
7 / 9 page Figure 9: Output Noise vs. Source Resistance Figure 10: Power Dissipation & Efficiency vs. Output Power APPLICATION HINTS (ref. to the circuit of fig. 1) SVR Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF time se- quence and, consequently, plays an essential role in the pop optimization during ON/OFF transients. To conveniently serve both needs, ITS MINIMUM RECOMMENDED VALUE IS 10 µF. INPUT STAGE The TDA7384A’S inputs are ground-compatible and can stand very high input signals ( ± 8Vpk) without any performances degradation. If the standard value for the input capacitors (0.1 µF) is adopted, the low frequency cut-off will amount to 16 Hz. STAND-BY AND MUTING STAND-BY and MUTING facilities are both CMOS-COMPATIBLE. If unused, a straight con- nection to Vs of their respective pins would be ad- missible. Conventional/low-power transistors can be employed to drive muting and stand-by pins in absence of true CMOS ports or microprocessors. R-C cells have always to be used in order to smooth down the transitions for preventing any audible transient noises. Since a DC current of about 10 uA normally flows out of pin 22, the maximum allowable muting-se- ries resistance (R2) is 70K Ω, which is sufficiently high to permit a muting capacitor reasonably small (about 1 µF). If R2 is higher than recommended, the involved risk will be that the voltage at pin 22 may rise to above the 1.5 V threshold voltage and the device will consequently fail to turn OFF when the mute line is brought down. About the stand-by, the time constant to be as- signed in order to obtain a virtually pop-free tran- sition has to be slower than 2.5V/ms. TDA7384A 7/9 |
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Ähnliche Beschreibung - TDA7384A |
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