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TDA7803A-QLX Datasheet(PDF) 28 Page - STMicroelectronics |
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TDA7803A-QLX Datasheet(HTML) 28 Page - STMicroelectronics |
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28 / 72 page  Functional description TDA7803A 28/72 DS12195 Rev 7 Figure 35. Short across the speaker and open load threshold description, line driver mode GAPGPS00809 Open Load Normal Load Short Across Load 0 Ω 20 Ω 60 Ω 1k Ω 3k Ω infinite Table 6. Start-up pulse typical timings (Fs = 48 kHz) Symbol Parameter Min Typ Max Unit Note TSTR Time to rise the outputs from 0V to a certain battery’s percentage - 10 (+ 10) - ms When A3V3 goes up, the reported number has to be added TSTF Time to rise the outputs from a certain battery’s percentage to 0V - 10 (+ 10) - ms When A3V3 goes down, the reported number has to be added TPLS Plateau time for soft-short and short to VCC/GND diagnostic -80 - ms This time parameter is load independent and is not stretchable setting bit IB6[7:5] TP Plateau time for short circuit or open load diagnostic detection phase - 80 (1) -ms TP = 86 ms · X when 140 ms - 2 ·TRU > 80 ms TP = (140 ms - 2·TRU) · X when 140 ms - 2 ·TRU < 80 ms TPL Pulse time for short circuit or open load diagnostic detection phase - 120 122.4(2) ms TP = (2·TRU + TP) · X X Multiplier factor in case of diagnostic active - 1,2,4,8 - - IB6[7:5] setting TRU=TRD Ramp-up and ramp-down diagnostic pulse’s time -5.8(3) - - 2 ohm case -8.3(3) - ms 4 ohm case TSS Soft-short diagnostic time - 100 - ms Output rising time + Output falling time + plateau time (no A3V3) THS Short to VCC and GND diagnostic time -120 - ms A3V3 rising and falling time (10 ms x2) + Output rising and falling time + plateau time TD Short load and open load diagnostic time - 148 - ms 2 ohm case (X=1) - 160 - ms 4 ohm case (X=1) Ttot Total diagnostic time -260 - ms 4 ohm load and no faults (Ttot = TSS + TD) -220 - ms Hard or soft short to supplies (Ttot = TSS + THS) -420 - ms Open load (X = 1, IB4 (D1/D2) = 0) Ttot = TSS + TD1 + TD2 |
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