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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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TDA7295S Fiches technique(PDF) 7 Page - STMicroelectronics |
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TDA7295S Fiches technique(HTML) 7 Page - STMicroelectronics |
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7 / 13 page  In addition to the overload protection described above, the device features a thermal shutdown circuit which initially puts the device into a muting state (@ Tj = 150 oC) and then into stand-by (@ Tj = 160 oC). Full protection against electrostatic discharges on every pin is included. 3) Other Features The device is provided with both stand-by and mute functions, independently driven by two CMOS logic compatible input pins. The circuits dedicated to the switching on and off of the amplifier have been carefully optimized to avoid any kind of uncontrolled audible transient at the output. The sequence that we recommend during the ON/OFF transients is shown by Figure 4. The application of figure 5 shows the possibility of using only one command for both st-by and mute functions. On both the pins, the maximum appli- cable range corresponds to the operating supply voltage. APPLICATION INFORMATION HIGH-EFFICIENCY Constraints of implementing high power solutions are the power dissipation and the size of the power supply. These are both due to the low effi- ciency of conventional AB class amplifier ap- proaches. Here below (figure 6) is described a circuit pro- posal for a high efficiency amplifier which can be adopted for both HI-FI and CAR-RADIO applica- tions. 1N4148 10K 30K 20K 10 µF 10 µF MUTE STBY D93AU014 MUTE/ ST-BY Figure 5: Single Signal ST-BY/MUTE Control Circuit PLAY OFF ST-BY MUTE MUTE ST-BY OFF D98AU817 5V 5V +Vs (V) +40 -40 VMUTE PIN #10 (V) VST-BY PIN #9 (V) -Vs VIN (mV) IQ (mA) VOUT (V) Figure 4: Turn ON/OFF Suggested Sequence TDA7295S 7/13 |
Numéro de pièce similaire - TDA7295S |
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Description similaire - TDA7295S |
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