Power Distribution Module (PDM) for MicroTCA

20 APRIL 2009

The Power Distribution Module (PDM) is used to power MicroTCA systems directly with standard, low cost, 12V output power supplies with AC or DC input. The PDM has the same functionality as a standard MicroTCA power module (PM) except it doesn’t have a DC-DC converter to generate the +12V payload power (PP) from -48V. An on-board DC-DC converter generates +3.3V for management power (MP). The PDM distributes management and payload power independently to all AMCs, MCHs and CUs according to the MicroTCA specification. It also provides inrush control and over-current protection with programmable fault time. The PDM is designed to work redundant. Two or more PDMs could be plugged in the same time in a system.
The PDM includes an EMMC controller and communicates with the MCH via IPMI messages sent over IPMB-0 bus. It is hot-swappable and is fully compatible with the MicroTCA specification.

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