TPS24772 Datasheet, PDF (1/51 Pages) Texas Instruments – 2.5 to 18-V High Performance Hot Swap

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TPS2477x 2.5 to 18-V High Performance Hot Swap
TPS24772
TPS24771
TPS24770
SLVSCZ3 – MARCH 2015
1 Features
•1 2.5V to 18V Bus Operation (30V abs max)
• Programmable Protection Settings:
– Current Limit: ±5% at 10mV
– Fast Trip: ±10% at 20mV
• Programmable FET SOA Protection
• Programable Response Time for Fast Trip
• Dual Timer (Inrush/Fault)
• Analog Current Monitor (1% at 25mV)
• Programmable UV and OV
• Status Flags for Faults and Power Good
• 4mm × 4mm 24-pin QFN
• 70 = Latch, 71 = Retry, 72 = Fast Latch Off
2 Applications
• Enterprise Storage
• Enterprise Server
• Networking Cards
• 240 VA Applications
3 Description
The TPS2477x is a high performance analog Hot
Swap Controller for 2.5 V to 18 V systems. The
precise and highly programmable protection settings
of the TPS2477x aid the design of high power high
availability systems where isolating faults is critical.
Programmable current limit, fast shut down, and fault
timer protect the load and supply during fault
conditions such as a hot - short. The fast shutdown
threshold and response time can be tuned to ensure
a fast response to real faults, while avoiding nuisance
trips. Programmable Safe Operating Area (SOA)
protection and the inrush timer keep the MOSFET
safe under all conditions. After asserting power good,
TPS2477x acts as a circuit breaker and runs the fault
timer during over current events, but doesn’t current
limit. It shuts down after the fault timer expires. Two
independent timers (inrush/fault) allow the user to
customize protection based on system requirements.
Finally, the flexibility of the TPS2477x aid Hot Swap
design for the 240 VA requirement and a design
example is shown in the datasheet.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS24770
TPS24771
TPS24772
RGE (24)
4.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
HS FET
V_IN
RSNS
C1
0.1 F
CFST
RHG
VDD SET FSTP SENM HGATE OUTH
ENHS
OV
TPS2477x
PGHS
FLTb
IMONBUF
PLIM IMON GND TINR TFLT
CINR
CFLT
V_OUT
COUT
Limiting Output Power to 240VA,
20 A I_LIM vs TPS2477x Implementation
300
VA Limiting with TPS2477x
Regular 20 A ILIM
280
260
240
220
200
180
10
11
12
13
14
Output Voltage (V)
C022
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.