System Description 4
miriac SBC-LS1028A User Manual
V 1.0
20/65
© MicroSys Electronics GmbH 2019
4.6
Power Supply
Input Supply Rating
The SBC-LS1028A system is run from a single DC power supply with the following
ratings:
Maximum Input Voltage Operating Range:
9V - 30V DC
Nominal Input Supply Voltage:
12V DC
Typical Current Consumption
(@12V / room temperature / U-Boot prompt):
~0,53A
ALWAYS use the correct type and polarity of the power supply!
DO NOT exceed the rated maximum values for the power supply! This may result in
severe permanent damage to the unit, as well as possible serious injury.
Input Protection
The board is protected against wrong polarity and over-voltage spikes.
Transistor TR3 is installed for polarity protection. It is switched on only if power is
connected with correct polarity (+Vin connected to Pin 1). Otherwise, TR3 will stay
off and no internal voltages are generated.
Over-voltage is limited to 33V by a TVS diode. Spikes higher than 33V will be cut
off. Please note that applying a permanent power higher than the breakdown
voltage will destroy the TVS diode.