User's Manual l MB-SMARC-3 UM 0100 l © 2022, TQ-Systems GmbH
Page 7
3.2
Power Supply
3.2.1
Supply Voltage Characteristics
The MB-SMARC-3 requires an input voltage of 12 V DC ±5 %.
The input voltages shall rise from 10 % of nominal to 90 % of nominal within 0.1 ms to 20 ms.
(0.1 ms ≤ Rise Time ≤ 20 ms).
There must be a smooth and continuous increase of each DC output voltage from 10 % to 90 % of its final set point within
the regulation range.
3.2.2
Power Consumption Specification
The power consumption of the system significantly depends on the connected devices (SMARC module, Mass storage devices,
USB devices, display backlight etc.).
The power consumption of the MB-SMARC-3 itself is approximately 2 W (SMARC module supplied externally;
UEFI-shell active; no keyboard, no mouse, no mass storage device etc. connected).
The maximum input current of the MB-SMARC-3 is limited to 5 A by a fuse. The load caused by devices connected to the carrier
board should not exceed 50 W.
Note: Power requirement
The power supply for the MB-SMARC-3 must be configured with enough reserve.
It should be calculated with the maximum power consumption of all connected components.
3.3
Environmental Specification
•
Operating temperature, extended:
–20 °C to +85 °C
•
Storage temperature:
–20 °C to +85 °C
•
Relative humidity (operating / storage):
10 % to 90 % (not condensing)
3.4
System Components
3.4.1
Audio
The MB-SMARC-3 provides a Realtec ALC262 High Definition Audio Codec and a Texas Instruments TLV320AIC3204 Stereo Audio
Codec. The mainboard is equipped with a multiplexer to switch from either audio codec to the audio jacks line in, microphone
and headphone. For more details see section 3.6.15.
3.4.2
Dual UART
The MB-SMARC-3 is equipped with a Fintek F81214 dual eSPI UART. The register set of the UART is based on the industry
standard 16550 UART. The connected serial ports operate with standard serial port drivers.
Содержание MB-SMARC-3
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