TPS2456 Datasheet, PDF (1/31 Pages) Texas Instruments – Dual 12 V Protection / Blocking Controller

TPS2456
www.ti.com
SLVSA78A – MARCH 2010 – REVISED MARCH 2010
Dual 12 V Protection / Blocking Controller
Check for Samples: TPS2456
FEATURES
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• Dual 12 V Protection and Blocking Control
• Independent Current Limit and Fast Trip
• Blocking Permits ORing of Multiple Inputs
• Power Good and Fault Outputs
• Analog Current Monitor Outputs
• -40°C to 125°C Operating Junction
Temperature
• QFN36 Package
APPLICATIONS
• ATCA Carrier Boards
• AdvancedMC™ Slots
• Blade Servers
• Base Stations
• Configurable for
– 1 Source, 2 Loads
– 2 Sources, 1 Load
– 2 Sources, 2 Loads
DESCRIPTION
The TPS2456 is a dual, 12 V, channel protection
(hotswap) and blocking (ORing) controller that
provides inrush control, current limiting, overload
protection, and reverse current blocking. The current
sense topology provides both accurate current limits
and independent setting of current limit and fast trip
thresholds.
The ORing control uses an external MOSFET to
block reverse current when an input is shorted.
Systems with closely matched supply voltages and
feed networks can supply current from both supplies
simultaneously.
The MONx output provides an accurate analog
indication of load current.
The protection circuits may be used without blocking,
and the blocking may be used without protection.
Internal connections prevent implementation of these
as four fully-independent functions.
INA
CINA
0.1mF
RSENSEA
RSETA
M1A
RG1A
M2A
RG2A
ENA
ORENA
CTA
33nF
CTA
VINT
CINT
0.1mF
GND
GND
GND
TPS2456
36 PIN QFN
COMMON
CIRCUITRY
ENB
ORENB
CTB
33nF
CTB
PGA
FLTA
MONA
GND
GND
GND
GND
GND
MONB
PGB
FLTB
RMON
CINB
0.1mF
INB
RSETB
RG1B
M1B
RSENSEB
RG2B
M2B
Figure 1. Two Sources, One Load 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.
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 © 2010, Texas Instruments Incorporated