4 Multiple Implementation of Short-Circuit Protection

There are multiple implementations of short-circuit protection. The function can work with a PMOS and PNP transistor configuration as well. The N-type active switches (NMOS, NPN) are more common and often with lower cost than the P-type switches (PMOS, PNP)

The advantage of the PMOS is the ground path will not be cut down, which is very important for some ground sensitive sub-system, like sensors, ADC or DAC.

Figure 4-1 N-Type Implementation Without R_sense

Figure 4-3 P-Type Implementation Without R_sense

Figure 4-2 N-Type Implementation With R_sense

Figure 4-4 P-Type Implementation With R_sense