TPS2482 Datasheet, PDF (1/56 Pages) Texas Instruments – 36-V Hotswap Controller with Precision I2C Power Monitoring

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TPS2482
TPS2483
SLUSAW1 A – DECEMBER 2012 – REVISED MARCH 2013
36-V Hotswap Controller with Precision I²C Power Monitoring
Check for Samples: TPS2482, TPS2483
FEATURES
1
•2 9-V to 36-V Input Range, 40 V Abs. Max
• Current, Voltage and Power Monitor
• ±0.5% Accurate Current Monitoring
( -25°C < T_J < 85°C)
• 16 Programmable I²C™ Addresses
• Configurable Averaging Options
• Programmable MOSFET SOA protection
• High Side Gate Drive for External N-FET
• Programmable Fault Timer
• Open-Drain Power-Good Output
• 20-Pin TSSOP Package
APPLICATIONS
• RRH (Remote Radio Heads)
• Storage Networks
• Plug-In Modules
• Base Station 24 V Antenna Power
• Industrial 24 V - 28 V Power
DESCRIPTION
The TPS2482 and TPS2483 provide hotswap control
and precision monitoring for 9-V to 36-V applications.
Accurate voltage, current, and power monitoring is
provided by a 16-bit A/D converter with a serial
interface that is compatible with I²C and SMBus.
Voltage and current measurements are interleaved
and multiplied internally to provide concurrent power
calculations. These devices have high current
monitoring accuracy over temperature and a broad
load range. This makes them well suited for
applications where load identity and health is
determined by current profile, such as remote radio
heads or cellular antennae.
The hotswap section drives N-channel MOSFETs,
with timed inrush and fault-current limiting. Advanced
MOSFET safe operating area (SOA) protection is
achieved by programmable constant-power foldback
and a fixed current limit. This results in an
exponential inrush current profile as shown in the
start-up figure below. As V_OUT ramps up and the V_DS
of the MOSFET is reduced the current increases
keeping MOSFET power dissipation within its SOA at
all times. The TPS2482 latches off after a hard fault,
while the TPS2483 automatically attempts to restart
after a cool-off delay.
The TPS2482 and TPS2483 can be dropped into
existing TPS2480 and TPS2481 sockets to provide
improved accuracy and operating voltage range. This
can be accomplished with no PCB changes and
minor software modifications.
Simplified Application Diagram
Example Start-Up Waveforms
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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.
I²C is a trademark of NXP B.V Corporation.
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