SMH4812_09 Datasheet, PDF (1/18 Pages) Summit Microelectronics, Inc. – Distributed Power Hot-Swap Controller

SUMMIT
MICROELECTRONICS, Inc.
Distributed Power Hot-Swap Controller
SMH4812
Preliminary
FEATURES
! Soft Starts Main Power Supply on Card Insertion
or System Power Up
! Senses Card Insertion via Short Pins or Ejector
Switches
! Master Enable to Allow System Control of Power
Up or Down
" Can be used as a Temperature Sense Input
! Programmable Independent Controls of a DC/DC
Converter
" Not Enabled until Host Supply Fully Soft
Started
" Programmable Time Delay
" Available Input to hold off Dependant Enables
until Conditions are Satisfied
! Highly Programmable Circuit Breaker
" Programmable Quick-Trip^TM Values
" Programmable Current Limiting
" Programmable Duty Cycle Times
" Programmable Over-current Filter
! Programmable Host Voltage Fault Monitoring
" Programmable Under-Voltage Hysteresis
" Programmable UV/OV Voltage Filter
" Programmable Fault Mode: Latched or Duty
Cycle
! Programmable Forced Shutdown Timer
! 2.5V and 5.0V Reference Outputs
" Eliminates the Need for Other Primary Volt-
ages
" Easy Expansion of External Monitor Func-
tions
! Supply Range +20VDC to >+500VDC
SIMPLIFIED APPLICATION DRAWING
0V
Disable/Enable
Pin Detect
Pin Detect
PD1#
VDD
ENPG
UV
SMH4812
OV
FS#
FAULT#
PG2#
PD2#
VSS
CBSENSE VGATE 2.5VREF 5.0VREF
DC/DC
–48V
2055 SAD 1.1
©SUMMIT MICROELECTRONICS, Inc., 2000 • 757 N. Mary Ave. • Sunnyvale, CA 94085 • Phone [phone] • FAX [phone] • www.summitmicro.com
Characteristics subject to change without notice
2055 4.1 03/27/09
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