TDA7563AH_08 查看數據表（PDF） - STMicroelectronics

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TDA7563AH_08

4 x 50W multifunction quad power amplifier with built-in diagnostics feature

STMicroelectronics 

Diagnostics functional description

TDA7563A

Figure 20. SVR and output behavior (case 1: without turn-on diagnostic)

Vsvr

Out

Permanent diagnostic

acquisition time (100mS Typ)

Bias (power amp turn-on)

Diagnostic Enable

(Permanent)

FAULT

event

t

Read Data

I2CB DATA

Permanent Diagnostics data (output)

permitted time

Figure 21. SVR and output pin behavior (case 2: with turn-on diagnostic)

Vsvr

Out

Turn-on diagnostic

acquisition time (100mS Typ)

Permanent diagnostic

acquisition time (100mS Typ)

t

Diagnostic Enable

(Turn-on)

Turn-on Diagnostics data (output)

permitted time

Diagnostic Enable

(Permanent)

FAULT

event

Bias (power amp turn-on)

permitted time

Read Data

Permanent Diagnostics data (output)

permitted time

I2CB DATA

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

26 dB to 12 dB gain setting. They are as follows:TDA7563A

Figure 22. Thresholds for short to GND/VS

S.C. to GND x Normal Operation x

S.C. to Vs

0V

1.2V 1.8V

VS-1.8V VS-1.2V

VS

D01AU1253

14/35

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