User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 38
3.8.13
MBa8Xx headers
The MBa8Xx provides two 100 mil headers. All unused signals are made available on these.
Besides the signals, 1.8 V, 3.3 V, 5 V and 12 V are available on each header. The maximum current load of the individual voltages
on the headers depends on the load on other connectors. In total, no more than the specified maximum current may be drawn
at the following interfaces:
Table 41:
Power consumption headers
Rail
I
max
Remark
V_12V
3 A
Sum of currents at X4, X5 and X22
V_5V
2 A
Sum of currents at X4, X5, X14 and X22
V_3V3_MB
2 A
Sum of currents at X4, X5 and X14
V_1V8
50 mA
Sum of currents at X4 and X5 if V_1V8 supplied by TQMa8Xx
1 A
Sum of currents at X4 and X5 if V_1V8 supplied by regulator on MBa8Xx
Note: Observe power consumption with regard to the overall system
The supply voltages (1.8 V, 12 V, etc.) provided at the MBa8Xx headers are not individually fused.
Technically, an overload of the fuse at the 24 V supply input is therefore possible, see also chapter
3.10.
Please note the resulting total current consumption of the MBa8Xx, which must be less than 4 A!
19:
The sum of the current consumptions of all 12 V supply voltages at LVDS (X14, X22) and X4 and X5 must not exceed 3 A.
20:
The sum of the current consumptions of all 5 V supply voltages at LVDS (X14, X22) and X4, X5 must not exceed 2 A.
21:
The sum of the current consumption of all 3.3 V supply voltages at DisplayPort (X23), LVDS (X14, X22) and X4, X5 must not exceed 2 A.
22:
Available per assembly option, see Table 51.
