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TDA7563PDTR Datasheet(PDF) 10 Page - STMicroelectronics |
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TDA7563PDTR Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 21 page TDA7563PD 10/21 The information related to the outputs status is read and memorized at the end of the current pulse top. The acquisition time is 100 ms (typ.). No audible noise is generated in the process. As for SHORT TO GND / Vs the fault-detection thresholds remain unchanged from 30 dB to 16 dB gain setting. They are as follows: Figure 22. Concerning SHORT ACROSS THE SPEAKER / OPEN SPEAKER, the threshold varies from 30 dB to 16 dB gain setting, since different loads are expected (either normal speaker's impedance or high impedance). The values in case of 30 dB gain are as follows: Figure 23. If the Line-Driver mode (Gv= 16 dB and Line Driver Mode diagnostic = 1) is selected, the same thresholds will change as follows: Figure 24. b) PERMANENT DIAGNOSTICS. Detectable conventional faults are: – SHORT TO GND – SHORT TO Vs – SHORT ACROSS THE SPEAKER The following additional features are provided: – OUTPUT OFFSET DETECTION The TDA7563PD has 2 operating statuses: 1 RESTART mode. The diagnostic is not enabled. Each audio channel operates independently from each other. If any of the a.m. faults occurs, only the channel(s) interested is shut down. A check of the output status is made every 1 ms (fig. 25). Restart takes place when the overload is removed. D01AU1253 S.C. to GND x S.C. to Vs 0V 1.8V VS-1.8V VS x Normal Operation 1.2V VS-1.2V S.C. across Load x Open Load 0V 1.5 Ω 70 Ω Infinite x Normal Operation 0.5 Ω 130 Ω D01AU1254 D01AU1252 S.C. across Load x Open Load 0 Ω 4.5 Ω 200 Ω infinite x Normal Operation 1.5 Ω 400 Ω |
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