7

Power section

7.1

Current limitation

The current limitation process is activated when the current sense connected on the output stage measures a

current value higher than a fixed threshold. When this condition is verified, the gate voltage is modulated to avoid

output current increasing over the limitation value.

The following figures (where BITX is intended as Xth bit of the Output Status Register) show typical output current

waveforms with different load conditions.

Figure 14. Switching on resistive load

Figure 15. Switching on bulb lamp

Figure 16. Switching on light inductive load

Figure 17. Switching on heavy inductive load

ISO808A, ISO808A-1

Power

section

DS14170 - Rev 1

page 20/38