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TDA7350A Datasheet(PDF) 10 Page - STMicroelectronics |
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TDA7350A Datasheet(HTML) 10 Page - STMicroelectronics |
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10 / 22 page  after power-on). Fig. 25 represents the detailed turn-on transient with reference to the stereo configuration. At the power-on the output decoupling capacitors are charged through an internal path but the de- vice itself remains switched off (Phase 1 of the represented diagram). When the outputs reach the voltage level of about 1V (this means that there is no presence of short circuits) the device switches on, the SVR capaci- tor starts charging itself and the output tracks ex- actly the SVR pin. During this phase the device is muted until the SVR reaches the ”Play” threshold (~2.5V typ.), af- ter that the music signal starts being played. Stereo/Bridge Switching There is also no need for external components for changing from stereo to bridge configuration (figg. 24-27). A simple short circuit between two pins allows phase reversal at one output, yet maintaining the quiescent output voltage. Stand-by The device is also equipped with a stand-by func- tion, so that a low current, and hence low cost switch, can be used for turn on/off. Stability The device is provided with an internal compen- sation wich allows to reach low values of closed loop gain. In this way better performances on S/N ratio and SVR can be obtained. Figure 24: Block Diagram; Stereo Configuration TDA7350A 10/22 |
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