TDA7566_10 Datasheet, PDF (4/29 Pages) STMicroelectronics – 4 x 40 W multifunction quad power amplifier with built-in diagnostics features

List of figures
List of figures
TDA7566
Figure 1.
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Figure 27.
Figure 28.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application and test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output power vs. supply voltage (4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output power vs. supply voltage (2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Distortion vs. output power (4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Distortion vs. output power (2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Distortion vs. frequency (4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Distortion vs. frequency (2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power dissipation and efficiency vs. output power (4 W, Sine) . . . . . . . . . . . . . . . . . . . . . 11
Power dissipation vs. average output power (audio program simulation, 4 W) . . . . . . . . . 11
Power dissipation vs. average output power (audio program simulation, 2 W) . . . . . . . . . 11
Turn - on diagnostic: working principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SVR and output behavior (case 1: without turn-on diagnostic). . . . . . . . . . . . . . . . . . . . . . 13
SVR and output pin behavior (case 2: with turn-on diagnostic) . . . . . . . . . . . . . . . . . . . . . 13
Thresholds for short to GND/V_S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Thresholds for short across the speaker/open speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Thresholds for line-drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Restart timing without diagnostic enable (Permanent) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Restart timing with diagnostic enable (Permanent) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Current detection: load impedance magnitude |Z| vs. output peak voltage of the sinus. . . 16
Data validity on the I²C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Timing diagram on the I²C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Timing acknowledge clock pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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Doc ID 9801Rev 5