LM5056 Datasheet, PDF (1/46 Pages) Texas Instruments – High-Voltage System Power Management Device with PMBus™

LM5056, LM5056A
www.ti.com
SNVS827A – OCTOBER 2012 – REVISED APRIL 2013
High-Voltage System Power Management Device with PMBus™
Check for Samples: LM5056, LM5056A
FEATURES
1
•2 Input Voltage Range: 10 V to 80 V
• Real-Time Monitoring of VIN, IIN, PIN, VOUT,
and VAUX with 12-bit resolution, 1-kHz
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 Compliant
Command Structure
APPLICATIONS
• Server Backplane Systems
• Base Station Power Distribution Systems
• Industrial Telemetry Applications
DESCRIPTION
The LM5056/LM5056A combines high-performance
analog and digital technology with a PMBus™
compliant 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 computes
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
accomplished 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 fault.
SPACER BETWEEN 2 COLUMN AND
APPLICATION DIAGRAM
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PMBus is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012–2013, Texas Instruments Incorporated