Sequence, Trim, Margin and Supervise 24 Power Supplies
Manage Faults, Monitor Telemetry and Create Fault Logs
PMBus Compliant Command Set
Supported by LTpowerPlay® GUI
Margin or Trim Supplies to within 0.15% of Target
Fast OV/UV Supervisors Per Channel
Coordinate Sequencing and Fault Management Across Multiple ADI PSM Devices
Automatic Fault Logging to Internal EEPROM
Operate Autonomously without Additional Software
Internal Temperature and Input Voltage Supervisors
Accurate Monitoring of 24 Output Voltages, Three Input Voltages and Internal Die Temperature
I2C/SMBus Serial Interface
Can Be Powered from 3.3V, or 4.5V to 15V
Programmable Watchdog Timer
Available in 210-Lead 8.1mm × 16.9mm BGA Package
LTC2980-24 Applications
Computers and Network Servers
Industrial Test and Measurement
High Reliability Systems
Medical Imaging
Video
LTC2980-24 Description
The LTC2980-24 is a 24-channel Power System Manager used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry and create fault logs. PMBus commands support power supply sequencing, precision point-of-load voltage adjustment and margining. DACs use a proprietary soft-connect algorithm to minimize supply disturbances. Supervisory functions include overvoltage and undervoltage threshold limits for 24 power supply output channels and three power supply input channels, as well as over and under temperature limits. Programmable fault responses can disable the power supplies with optional retry after a fault is detected. Faults that disable a power supply can automatically trigger black box EEPROM storage of fault status and associated telemetry. An internal 16-bit ADC monitors 24 output voltages, three input voltages, and die temperature. In addition, odd numbered channels can be configured to measure the voltage across a current sense resistor. A programmable watchdog timer monitors microprocessor activity for a stalled condition and resets the microprocessor if necessary. A single wire bus synchronizes power supplies across multiple ADI Power System Management (PSM) devices. Configuration EEPROM with ECC supports autonomous operation without additional software.
