LM5066_14 Datasheet, PDF (1/64 Pages) Texas Instruments – High Voltage System Power Management and Protection IC with PMBus

LM5066
www.ti.com
SNVS655F – JUNE 2011 – REVISED AUGUST 2011
LM5066 High Voltage System Power Management and Protection IC with PMBus
Check for Samples: LM5066
FEATURES
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•2 Input voltage range: 10V to 80V
• Programmable 26 mV or 50 mV Current Limit
Threshold with Power Limiting (MOSFET
Power Dissipation Limiting)
• Real time monitoring of V_IN, V_OUT, I_IN, P_IN, V_AUX
with 12-bit resolution and 1 kHz sampling rate
• Configurable Circuit Breaker protection for
hard shorts
• Configurable Under-Voltage and Over-Voltage
protection
• Remote temperature sensing with
programmable warning and shutdown
thresholds
• Detection and notification of damaged
MOSFET condition
• Power measurement accuracy: ±4.5% over
temperature
• True Input Power averages dynamic power
readings
• Averaging of V_IN, I_IN, P_IN, and V_OUT over
programmable interval ranging from 0.001 to 4
seconds
• 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
• Full featured application development software
• eTSSOP-28 package
APPLICATIONS
• Server Backplane Systems
• Base Station Power Distribution Systems
• Solid State Circuit Breaker
DESCRIPTION
The LM5066 combines a high performance hot swap controller with a PMBus™ compliant SMBus/I²C interface
to accurately measure, protect and control the electrical operating conditions of systems connected to a
backplane power bus. The LM5066 continuously supplies real-time power, voltage, current, temperature and fault
data to the system management host via the SMBus interface.
The LM5066 control block includes a unique hot swap architecture that provides current and power limiting to
protect sensitive circuitry during insertion of boards into a live system backplane, or any other "hot" power
source. A fast acting circuit breaker prevents damage in the event of a short circuit on the output. The input
under-voltage and over-voltage levels and hysteresis are configurable, as well as the insertion delay time and
fault detection time. A temperature monitoring block on the LM5066 interfaces with a low-cost external diode for
monitoring the temperature of the external MOSFET or other thermally sensitive components. The PGD output
provides a fast indicator when the input and/or output voltages are outside their programmed ranges. LM5066
current measurement accuracy is ±4.5% over the operating temperature range.
The LM5066 monitoring block computes both the real-time and average values of subsystem operating
parameters (V_IN, I_IN, P_IN, V_OUT) 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/Fault Snapshot) function captures
and stores telemetry data and device status in the event of a warning or a fault.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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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 © 2011, Texas Instruments Incorporated