PICMG 2.11, CompactPCI Power Interface

CompactPCI ®
PICMG 2.11 Revision 1.0
Power Interface
Short Form Specification
October 1, 1999
FOR INFORMATION ONLY; DO NOT ATTEMPT TO DESIGN
FROM THIS DOCUMENT
NOTE: This short form specification is a subset of the CompactPCI Power Interface specification,
PICMG 2.11 R 1.0. For complete guidelines on the design of compliant power supplies and systems, the
full specification is required.
For a full copy of the PICMG 2.11 specification, go to www.picmg.org, or contact the PCI Industrial
Computer Manufacturers Group at 401 Edgewater Place, Suite 500, Wakefield, Mass., 01880. Phone
781-246-9318, fax 781-224-1239, email info@picmg.org.
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Overview
This short form specification is a subset of the full CompactPCI Power Interface
Specification, PICMG 2.11 Revision 1.0. This document is meant as a guide for those
considering use of pluggable style power supplies for CompactPCI, but is not a design
document. Anyone wishing to design a power supply backplane for CompactPCI power
supplies should obtain the full specification from PICMG. You can also download an
electronic version of this short form specification from the PICMG Web site at
www.picmg.org. The CompactPCI specifications are open specifications supported by
the PICMG (PCI Industrial Computer Manufacturers Group), which is a consortium of
companies involved in utilizing PCI for embedded applications. PICMG controls this
specification.
The complete PICMG 2.11 specification defines the electrical and mechanical interfaces,
and minimum requirements for modular CompactPCI pluggable power supplies and
related CompactPCI platforms based on the CompactPCI core specification, PICMG 2.0
R2.1. The full specification, PICMG 2.11, provides a defined interface to support higher
power supply output current levels and 6U form factor power supplies, as well as
providing some additional functionality to support Hot Swap applications, and a growth
path for high availability systems.
Scope
The scope of this specification covers 3U and 6U IEEE 1101.x compatible modular
pluggable power supply modules and platforms that support pluggable power supply
modules.
This specification is intended to cover modular pluggable power supplies in the power
range of 100 W to 600 W.
Desired Audience
CompactPCI exists to provide a standard form factor for those applications requiring the
high performance of PCI as well as the small size and ruggedness of a rack mount
system. CompactPCI provides a mechanism for OEM and end users to directly apply
PCI components and technology to a new mechanical form factor while maintaining
compatibility with existing operating systems and application software available for
desktop PCI.
Pluggable power supplies exist to provide a reliable, convenient mechanism for power
supply servicing via front panel access. This is particularly useful for hot swap systems
and high availability systems with dual redundant or N+1 redundant power supplies.
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Electrical
Power Supply
CompactPCI pluggable power supplies that conform to this specification shall conform to
the following electrical requirements:
a) shall provide all required outputs, per PICMG CompactPCI 2.0 R 3.0 core
specification,
b) shall support the power connector pinout described in the full PICMG 2.11
specification (which includes information on required vs. optional signals),
c) shall meet the voltage tolerance and ripple requirements of PICMG 2.0 when
connected to a backplane meeting the capacitance recommended in PICMG 2.0 for a
two slot configuration (twice the recommended single slot capacitance),
d) may use two power connectors (P1 and P2) for higher output power supplies,
e) The signals GA[2..0] on the power connector, are available for use by power supplies
to provide a unique differentiation based upon which physical slot the board has been
inserted.
Backplane/Platform
CompactPCI backplanes/platforms supporting pluggable power supplies that conform to
this specification shall conform to the following electrical requirements:
a) shall support the following control signals at the system slot:
FAL# (Slot 1, J2:C15)
DEG# (Slot 1, J2:C16)
b) shall support the following control signals at the power supply slot:
EN#
INH#
c) may use two power connectors (J1 and J2) for higher output power supplies
d) The GA0, GA1, and GA2 signals shall be supported by the backplane as outlined in
PICMG 2.11.
Mechanical
Board
CompactPCI pluggable power supplies that conform to this specification shall conform to
the following mechanical requirements:
a) shall meet mechanical envelope dimensions as depicted in the full PICMG 2.11,
b) shall meet the connector location dimensions as depicted in the full PICMG 2.11
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This is accomplished by using VITA 30-compatible 1/2 HP offset guide rails for
pluggable power supplies. Note that this means that the card guide’s slot and
injector/ejector PCB mounting surface are shifted 2.54 mm (0.1 in.) to the right.
c) power supplies should be 4HP width, or any multiple thereof; power supplies may be
any other width that is greater than 4HP and is a multiple of 1HP, but this is not
recommended because it may cause packaging integration problems,
d) shall provide IEEE 1101.10 compatible front panel with EMI gasket and guide pin,
e) should provide IEEE 1101.11 compatible front panel protective ground,
f) 3U power supplies should provide an IEEE 1101.10 compatible injector/extractor
device, located on the lower edge of the board’s front panel,
g) 6U power supplies should provide two IEEE 1101.10 compatible injector/extractor
devices,
h) shall provide IEEE 1101.10 compatible front panel keying; and the IEEE 1101.10
compatible front panel keying shall be set to the key code specified in PICMG 2.11
according to the configuration of the power supply;
i) power supply manufacturers should define their specific requirements such as
maximum operating temperature and cooling, including required cooling airflow rate,
and any restrictions on air flow direction. This cooling air flow rate is the air flow
required to cool the power supply at maximum rated output power and maximum
rated temperature, when tested within the power supply’s mechanical envelope (e.g.
4HP, 8HP width of power supply), and should provide data on the resulting pressure
drop at that required air flow rate.
Backplane/Platform
CompactPCI backplanes/platforms supporting pluggable power supplies that conform to
this specification shall conform to the following mechanical requirements:
a) shall meet the backplane/platform connector location dimensions as depicted in the
full PICMG 2.11
This shall be accomplished by using VITA 30-compatible 1/2 HP offset guide
rails for pluggable power supplies. Color shall be green. Note that this means
that the slot in the card guide and injector/ejector PCB mounting surface are
shifted 2.54 mm (0.1 in.) to the right with respect to the front panel keying and
alignment pin.
b) should provide IEEE 1101.11 compatible front panel protective ground.
c) shall provide IEEE1101.10 compatible front panel keying; and the IEEE1101.10
compatible front panel keying shall be set to the key code specified in PICMG 2.11
according to the configuration of the power supply that is supported by the platform.
Front Panel Keying
Refer to IEEE1101.10 for information on key locations. Use of front panel key chambers
D, E, and F are defined for both 3U and 6U pluggable power supply slot locations only.
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Front panel key chambers A, B, and C are also defined for 6U power supplies, and are set
identically to key chambers D, E, and F. Chambers A, B, and C are keyed on 6U power
supplies in order to provide keys physically close to both P1/J1 and P2/J2. Since power
supplies are using a different type of connector vs. other CompactPCI slots, there is no
possibility of mating problems with 2mm connectors. These key options will be
independent of the 2mm application card keys, and may duplicate key codes that are used
for different purposes elsewhere in the system. This is acceptable, and will cause no
problems. See tables in the complete PICMG 2.11 specification for more information.
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Cross Sectional Board, Connector, Backplane and Front Panel View
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Modular Power Supply Connector
Pin # (1) Staging # (2) Signal Name Description
1-4 M V1 V1 Output
5-12 M RTN V1 and V2 Return
13-18 M V2 V2 Output
19 M RTN V3 Return
20 M V3 V3 Output
21 M V4 V4 Output
22 M RTN Signal Return
23 M RESERVED Reserved
24 M RTN V4 Return
25 M GA0 Geographic Address Bit 0
26 M RESERVED Reserved
27 S EN# Enable
28 M GA1 Geographic Address Bit 1
29 M V1ADJ V1 Adjust
30 M V1 SENSE V1 Remote Sense
31 M GA2 Geographic Address Bit 2
32 M V2ADJ V2 Adjust
33 M V2 SENSE V2 Remote Sense
34 M S RTN Sense Return
35 M V1 SHARE V1 Current Share
36 M V3 SENSE V3 Remote Sense
37 M IPMB_SCL (3) Reserved for System Management Bus
38 M DEG# Degrade Signal
39 M INH# Inhibit
40 M IPMB_SDA (3) Reserved for System Management Bus
41 M V2 SHARE V2 Current Share
42 M FAL# Fail Signal
43 M IPMB_PWR (3) Reserved for System Management Bus
44 M V3 SHARE V3 Current Share
45 L CGND Chassis Ground (safety ground)
46 M ACN/+DC IN AC Input – Neutral; +DC Input
47 M ACL/-DC IN AC Input – Line; -DC Input
______________________________________________
(1)
Pin numbers illustrated are of the female backplane connector
(2)
L = Long length pins (first mate, last break), M = Medium length pins, S = Short length pins (last mate,
first break)
(3)
These signals are to be defined by PICMG 2.9 Secondary System Management Bus
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