Diagnostics functional description

TDA7564B

18/34

This feature is disabled if any overloads leading to activation of the short-circuit protection

occurs in the process.

Figure 27. Current detection high: load impedance |Z| vs. output peak voltage

Figure 28. Current detection low: load impedance |Z| vs. output peak voltage

12

34

5

6

7

8

1

2

3

5

10

20

30

50

Vout (Peak)

Load |z| (Ohm)

Iout (peak) <250mA

Iout (peak) >500mA

Low current detection area

(Open load)

D5 = 1 of the DBx byres

High current detection area

(Normal load)

D5 = 0 of the DBx bytes

IB2(D7) = 0

0.5

1

1.5

2

2.5

3

3.5

4

1

2

3

5

10

20

30

50

Vout (Peak)

Load |z| (Ohm)

Iout (peak) <125mA

Iout (peak) >250mA

Low current detection area

(Open load)

D5 = 1 of the DBx byres

High current detection area

(Normal load)

D5 = 0 of the DBx bytes

IB2(D7) = 1