AN4069

Board characteristics

Doc ID 022926 Rev 1

5/16

2

Board characteristics

The demonstration board is provided with a STEF05PUR for the 5 V rail, a STEF12PUR for

the 12 V rail, and a MOSFET switch connected to the ENABLE/FAULT pins to reset the E-

fuses in case of thermal fault.

The board provides for separate or linked ENABLE pins, in order to allow either the

observation of each single E-fuse or the complete 5 V/12 V protection application.

The short-circuit current limit is programmed to the standard values (2.9 A for the STEF05,

4.4 A for the STEF12), by means of a 22

Ω resistor placed on each channel. This resistor

can be replaced by the user in order to set the desired current level.

The dV/dt control capacitor, used to set up the turn-on time and slew rate, is optional.

Figure 2.

Demonstration board layout - top layer

Figure 3.

Demonstration board layout - bottom layer