Connect Tech - COM Express Type-6 PMC/XMC Carrier Board - User Manual
Revision 0.03
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Active Input Power Protection Details
A benefit to using the
COM Express Type-6 PMC/XMC Carrier
is that it protects loads from high voltage
input transients. It regulates the output during an overvoltage event, such as load dump in vehicles, by
controlling the gate of an external N-channel MOSFET. The output is limited to a safe value allowing the
loads to continue functioning.
The
COM Express Type-6 PMC/XMC Carrier
also monitors the voltage drop to protect against overcurrent
faults. In either fault condition, a timer is started inversely proportional to MOSFET stress. If a fault
condition persists, the supply is turned off.
Two precision comparators monitor the input supply for overvoltage (OV) and undervoltage (UV)
conditions. When the potential is below the UV threshold, the external MOSFET is kept off. If the input
supply voltage is above the OV threshold, the MOSFET is not allowed to turn back on. Back-to-back
MOSFETs are used for reverse input protection, reducing voltage drop and power loss.
Input Power Connector Details
Function
Main Input Power
Location
P5
Range
+6 VDC to +36 VDC
Type
4 Position 5mm pitch terminal connector
Mating Connector PN: 20020003-G041B01LF
Pinout
Pin
Signal
Description
1
+VIN
Power In
2
+VIN
Power In
3
GND
Ground / Return
4
GND
Ground / Return
