Datasheet

LM5066
www.ti.com SNVS655G –JUNE 2011–REVISED FEBRUARY 2013
LM5066 High Voltage System Power Management and Protection IC with PMBus
Check for Samples: LM5066
1
FEATURES
APPLICATIONS
2
• Input Voltage Range: 10V to 80V
• Server Backplane Systems
• Programmable 26 mV or 50 mV Current Limit • Base Station Power Distribution Systems
Threshold with Power Limiting (MOSFET
• Solid State Circuit Breaker
Power Dissipation Limiting)
• Real Time Monitoring of V
IN
, V
OUT
, I
IN
, P
IN
, V
AUX
DESCRIPTION
with 12-Bit Resolution and 1 kHz Sampling
The LM5066 combines a high performance hot swap
Rate
controller with a PMBus™ compliant SMBus/I
2
C
interface to accurately measure, protect and control
• Configurable Circuit Breaker Protection for
the electrical operating conditions of systems
Hard Shorts
connected to a backplane power bus. The LM5066
• Configurable Under-Voltage and Over-Voltage
continuously supplies real-time power, voltage,
Protection
current, temperature and fault data to the system
management host via the SMBus interface.
• Remote Temperature Sensing with
Programmable Warning and Shutdown
The LM5066 control block includes a unique hot
Thresholds
swap architecture that provides current and power
limiting to protect sensitive circuitry during insertion of
• Detection and Notification of Damaged
boards into a live system backplane, or any other
MOSFET Condition
"hot" power source. A fast acting circuit breaker
• Power Measurement Accuracy: ±4.5% Over
prevents damage in the event of a short circuit on the
Temperature
output. The input under-voltage and over-voltage
• True Input Power Averages Dynamic Power
levels and hysteresis are configurable, as well as the
Readings
insertion delay time and fault detection time. A
temperature monitoring block on the LM5066
• Averaging of V
IN
, I
IN
, P
IN
, and V
OUT
Over
interfaces with a low-cost external diode for
Programmable Interval Ranging from 0.001 to
monitoring the temperature of the external MOSFET
4 Seconds
or other thermally sensitive components. The PGD
• Programmable WARN and FAULT Thresholds
output provides a fast indicator when the input and/or
with SMBA Notification
output voltages are outside their programmed ranges.
LM5066 current measurement accuracy is ±4.5%
• Black Box Capture of Telemetry
over the operating temperature range.
Measurements and Device Status Triggered by
WARN or FAULT Condition
The LM5066 monitoring block computes both the
real-time and average values of subsystem operating
• I
2
C/SMBus Interface and PMBus Compliant
parameters (V
IN
, I
IN
, P
IN
, V
OUT
) as well as the peak
Command Structure
power. Accurate power averaging is accomplished by
• Full Featured Application Development
averaging the product of the input voltage and
Software
current. A black box (Telemetry/Fault Snapshot)
• HTSSOP-28 Package
function captures and stores telemetry data and
device status in the event of a warning or a fault.
1
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PRODUCTION DATA information is current as of publication date.
Copyright © 2011–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.