1
dc2023afa
DEMO MANUAL DC2023A
Description
16-Channel Power Supply
System Featuring the LTM2987
Power System Manager
The DC2023A is a demonstration system for the
LTM
®
2987
16-channel I
2
C/SMBus/PMBus power system manager
with EEPROM. The LTM2987 monitors and controls 16
power supply rails. The DC2023A demonstrates the abil-
ity of the LTM2987 to sequence, trim, margin, supervise,
monitor, and log faults for 16 power supply rails. Each
power supply channel’s output voltage is monitored and
the LTM2987 monitors its own internal die temperature.
The DC2023A is a single circuit board that contains sixteen
independent power supply rails. The board employs sixteen
LTC
®
3405A 300mA switch-mode regulators, which are
configured to be controlled by the LTM2987. The LTM2987
is available in a µModule
®
(micromodule) package and
contains two LTC2977 devices. This board provides a
sophisticated 16-channel digitally programmable power
supply system. The rail voltages are programmable within
the trim range shown in the Performance Summary.
This demonstration system is supported by the
LTpowerPlay™ graphical user interface (GUI) that enables
complete control of all the features of the LTM2987. To-
gether, the LTpowerPlay software and DC2023A hardware
system create a powerful development environment for
designing and testing LTM2987 configuration settings.
These settings can be stored in the device’s internal
EEPROM or in a file. This file can later be used to order
pre-programmed devices or to program devices in a
production environment. The software displays all of
the configuration settings and real time measurements
from the LTM2987. Telemetry allows easy access and
decoding of the fault log created by the LTM2987. The
board comes pre-programmed with the EEPROM values
appropriate for the sixteen power supplies used on the
DC2023A. Just plug and play!
Multiple DC2023A board sets can be cascaded together
to form a high channel count power supply (see Multi-
Board Arrays). This cascaded configuration demonstrates
features of the LTM2987 which enable timing and fault
information to be shared across multiple ICs. The user can
L
, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and PowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
configure up to eight DC2023A boards, thereby control-
ling up to 128 separate power supply rails. Larger arrays
of LTM2987s are supported through programmable I
2
C
base address or bus segmentation.
The DC2023A demo board can be powered by an external
power supply, such as a +12VDC supply. Communication
with the software is provided through the DC1613 USB-to-
I
2
C/SMBus/PMBus Controller. The following is a checklist
of items which can be obtained from the LTC website or
LTC Field Sales.
•
USB-to-I
2
C/SMBus/PMBus Controller (DC1613)
•
LTpowerPlay Software
DC2023A Features
•
Sequence, Trim, Margin, and Supervise Sixteen Power
Supplies
•
Manage Faults, Monitor Telemetry, and Create Fault
Logs
•
PMBus Compliant Command Set
•
Supported by LTpowerPlay GUI
•
Margin or Trim Supplies to 0.25% Accuracy
•
Fast OV/UV Supervisors Per Channel
•
Supports Multi-Channel Fault Management
•
Automatic Fault Logging to Internal EEPROM
•
Operates Autonomously without Additional Software
•
Sixteen OV/UV V
OUT
and Two V
IN
Supervisors
•
Telemetry Reads Back V
IN
, V
OUT
, and Temperature
• 16-
Channel Time-Based Output Sequencer
•
I
2
C/SMBus Serial Interface
•
Integrated Decoupling Capacitors and Pull-Up Resistors
•
Powered from 6V to 14VDC
•
Available in 144-Lead 15mm
×
15mm BGA
Design files for this circuit board are available at
http://www.linear.com/demo
