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Schroff MicroTCA System
Backplane 23005-435
21850-045/-046/-081
3.8 Power Management
The integrated Power Management circuitry on the Backplane provides 12 V Payload
Power distribution branches to the MCH Slot and the AMC Slots. It also generates the
3.3 V management power and distributes it to all slots.
Without the Power Management Board (PMB) the MCH do not manage and
control the power-up sequence of the payload AMCs!
The PMB is fitted only in the systems 21850-046/-081, but can be upgraded to
the system 21580-045
Figure 7: Power Distribution (Without Power Management Board)
12 V Payload Power
3.3 V Managem. Power
12 V to 3.3 V
DC-DC Converter
MCH
MCH Present (Ps1#)
+12 V from integrated Power Supply
12 V Payload Power
3.3 V Managem. Power
AMC1
AMC1 Present (PS1#)
12 V Payload Power
3.3 V Managem. Power
AMC2
AMC2 Present (PS1#)
12 V Payload Power
3.3 V Managem. Power
AMC3
AMC3 Present (PS1#)
12 V Payload Power
3.3 V Managem. Power
AMC4
AMC4 Present (PS1#)
Backplane
12807825
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R1.0, May 06, 2009