LTC2980 Datasheet, PDF (1/26 Pages) Linear Technology – 16-Channel Power Supply System Featuring the LTC2980 Power System Manager

DEMO MANUAL DC2198A
16-Channel Power Supply
System Featuring the LTC2980
Power System Manager
DESCRIPTION
The DC2198A is a demonstration system for the LTC^®2980
16-channel I²C/SMBus/PMBus power system man-
ager with EEPROM. The LTC2980 monitors and controls
16 power supply rails. The DC2198A demonstrates the
ability of the LTC2980 to sequence, trim, margin, supervise,
monitor, and log faults for sixteen power supply rails. Each
power supply channel’s output voltage is monitored and
the LTC2980 monitors its own internal die temperature.
The DC2198A is a single circuit board that contains sixteen
independent power supply rails. The board employs sixteen
LTC3405A 300mA switch-mode regulators, which are
configured to be controlled by the LTC2980. The LTC2980
is available in a BGA 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 LTC2980. Together, the LTpowerPlay
software and DC2198A hardware system create a powerful
development environment for designing and testing LTC2980
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 LTC2980. Telemetry allows easy access and decoding
of the fault log created by the LTC2980. The board comes
pre-programmed with the EEPROM values appropriate for
the sixteen power supplies used on the DC2198A. Just plug
and play!
Multiple DC2198A boards can be cascaded together to
form a high channel count power supply (see Multi-
Board Arrays). This cascaded configuration demon-
strates features of the LTC2980 which enable timing
and fault information to be shared across multiple ICs.
The user can configure up to four DC2198A boards,
thereby controlling up to 64 separate power supply
rails. Larger arrays of LTC2980s are supported through
programmable I²C base address or bus segmentation.
The DC2198A 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-
I²C/SMBus/PMBus Controller. The following is a checklist
of items which can be obtained from the LTC website or
LTC Field Sales.
• USB-to-I²C/SMBus/PMBus Controller (DC1613)
• LTpowerPlay™ Software
DC2198A 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
• I²C/SMBus Serial Interface
• Powered from 6V to 14VDC
• Available in 144-Pin 12mm × 12mm BGA
Design files for this circuit board are available at
http://www.linear.com/demo/DC2198A
L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks
and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
dc2198af
1