AN2842

Approach to the study

Doc ID 15110 Rev 1

17/22

This current imbalance causes an increase in power losses and consequently an increase

of its working temperature. Since the thermal coefficient for the resistance is positive, the

resistance increases in value, limiting the current with a negative feedback. If the number of

devices in parallel is high, this process is very quick.

2.8

In the previous paragraphs we have seen how current imbalance is present during the

commutation and in particular during the plateau zone. During this phase, a parameter that

value is around 5 V. If we observe the transfer characteristics reported in

Figure 22, we can