Analog Devices DC2875A Demo Manual

High Voltage Two 2-Channel PMBus Power System
DESCRIPTION
The DC2875A is a demonstration system for the
Power System Manager that interfaces to various regula-
tors. The board contains all the circuitry needed to demon-
strate a power system that utilizes two 2-channel LTC2971
devices that manage four power supplies. The four power
supplies include various switching regulators for the pur-
pose of demonstrating a variety of methods to sense volt-
age and current. The demo board provides a sophisticated
4-channel digitally programmable power supply system.
The LTC2971 is a 2-channel I
System Manager that features accurate input current
and energy measurement and is capable of managing
±60V supplies. The device monitors input current and
input voltage, and calculates input power and energy.
The DC2875A demonstrates the ability of the LTC2971
to sequence, trim, margin, supervise, monitor, and log
faults for four power supplies. The LTC2971 monitors
each channel's output voltage and output current and also
monitors each channel's external temperature sensor and
its own internal die temperature.
The DC2875A board contains four independent power
supply rails. All four rails are based on DC/DC switching
regulators. The +36V and +32V channels are managed by
an LTC2971 and the ±24V channels are managed by an
LTC2971-1. The board is pre-configured with these volt-
ages and may be re-configured with feedback resistors.
The LTpowerPlay graphical user interface (GUI) sup-
®
ports this demonstration system and enables complete
control of all the features of the LTC2971. Together, the
LTpowerPlay software and DC2875A hardware system
create a powerful development environment for design-
ing and testing configuration settings of the LTC2971.
LTpowerPlay stores these settings in the LTC2971 internal
EEPROM or in a project file. The software displays all of
the configuration settings and real time measurements
from the Power System Management IC. Telemetry allows
easy access and decoding of the fault log created by the
LTC2971. The board comes preprogrammed with the
Managers with Four Power Supply Rails
LTC 2971
®
2
C/SMBus/PMBus Power
DEMO MANUAL DC2875A
EEPROM values appropriate for the four power supply
rails on the DC2875A. Just plug and play!
Order preprogrammed devices from Analog Devices
Express (ADX) using LTpowerPlay:
com/en/design-center/device-programming.html
The following items are required:
• +12VDC Power Supply
2
• USB-to-I C/SMBus/PMBus Controller (DC1613)
• LTpowerPlay Software
DC2875A FEATURES
• Sequence, Trim, Margin, and Supervise Four
Power Supplies
• Manage Faults, Monitor Telemetry, Create Fault Logs
• PMBus Compliant Command Set
• Supported by LTpowerPlay GUI
• Margin or Trim Supplies to 0.25% Accuracy
• Four I and Two I
OUT IN
• Input Power Measurement and Energy Accumulation
• Fast OV/UV Supervisors per Channel
• Multi-Channel Fault Management
• Automatic Fault Logging to Internal EEPROM
• Operates Autonomously without Additional Software
• Monitors: Voltage, Current, Power, Temperature
• 2-Channel Time-Based Output Sequencer
2
• I C/SMBus Serial Interface
• Powered from 8V to 18V
Design files for this circuit board are
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. patents, including 7382303, 7420359, and 7940091.
LTC2971
https://www.analog.
Monitors
available.
Rev. 0
1