LM5056 Datasheet | Texas Instruments

LM5056, LM5056A .ti. SNVS827A - OCTOBER 2012 - REVISED APRIL 2013 High-Voltage System Power Management Device with PMBus™ Check for Samples: LM5056, LM5056A Features - 2 Input Voltage Range: 10 V to 80 V - Real-Time Monitoring of VIN, IIN, PIN, VOUT, and VAUX with 12-bit resolution, 1-k Hz sampling rate - True input Power Measurement using simultaneous sampling of Vin and Iin - Remote Temperature Sensing with programmable warning thresholds - Power Measurement Accuracy - LM5056A: ±1.75% - LM5056: ±2.25% - Current Measurement Accuracy - LM5056A: ±1.25% - LM5056: ±1.5% - Voltage Measurement Accuracy: ±1.0% - Averaging of VIN, IIN, PIN, and VOUT with Programmable Interval Ranging from 0.001 s to 4 s - Programmable WARN and FAULT Thresholds with SMBA Notification - Black-Box Capture of Telemetry Measurements and Device Status Triggered by WARN or FAULT Condition - I2C/SMBus Interface and PMBus pliant mand Structure APPLICATIONS - Server Backplane Systems - Base Station Power Distribution Systems - Industrial Telemetry Applications DESCRIPTION The LM5056/LM5056A bines high-performance analog and digital technology with a PMBus™ pliant SMBus™ and I2C interface to accurately measure the electrical operating conditions of systems connected to a backplane power bus. The LM5056/LM5056A continuously supplies real-time power, voltage, current, temperature and fault data to the system management host via the SMBus interface. The LM5056/LM5056A monitoring block putes both the real time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) as well as the peak power. Accurate power averaging is acplished by averaging the product of the input voltage and current. A black-box (telemetry and fault snapshot) function captures and stores telemetry data and device status in the event of a warning or a...