DESCRIPTION

· The LM25056 integrates high-performance analog and digital technology with a PMBus™ compliant SMBus™/I2C interface to accurately measure the operating conditions of electrical systems, including computing and storage blades connected to a backplane power bus.

· It continuously supplies real-time power, voltage, current, and temperature data to the system management host via the SMBus interface.

· The monitoring block captures both real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VAUX) as well as peak power.

· Accurate power measurement is achieved by measuring the product of the input voltage and current through a shunt resistor.

· Features a black box (Telemetry/Fault Snapshot) function that captures and stores telemetry data and device status in the event of a warning or fault.

FEATURES

· Input Voltage Range: 3V to 17V.

· I2C/SMBus Interface with PMBus Compliant Command Structure.

· Remote Temperature Sensing with Programmable Warning and Shutdown Thresholds.

· Real-Time Monitoring of VIN, IIN, PIN, VAUX with 12-bit Resolution and 1kHz Sampling Rate.

· True Input Power Measurement Using Simultaneous Sampling of VIN and IIN.

· Averaging of VIN, IIN, PIN, and VAUX Over Programmable Interval Ranging from 0.001 to 4 Seconds.

· User Programmable WARN and FAULT Thresholds with SMBAN Notification.

· Black Box Capture of Telemetry Measurements and Device Status Triggered by WARN and FAULT Conditions.

· Full-Featured Application Development Software.

· WQFN-24 Package.

APPLICATIONS

· Server Backplane Systems.

· Base Station Power Distribution Systems.

· Subsystem Power Measurement.