SMH4803AS View Datasheet(PDF) - Summit Microelectronics
Part Name
Description
MFG CO.
'SMH4803AS' PDF : 19 Pages View PDF
SUMMIT
MICROELECTRONICS, Inc.
Distributed Power Hot Swap Controller
SMH4803A
Preliminary
FEATURES
l Soft Starts Main Power Supply on Card Insertion
or System Power Up
l Senses Card Insertion via Short Pins or Ejector
Switches
l Master Enable to Allow System Control of Power
Up or Down
w Can be used as a Temperature Sense Input
l Programmable Independent Controls of 3 DC/DC
Converters
w Not Enabled until Host Supply Fully Soft
Started
w Programmable Time Delay Between each
Enable Signal
w Available Input to hold off Dependant Enables
until Conditions are Satisfied
l Highly Programmable Circuit Breaker
w Programmable Quick-TripTM Values
w Programmable Current Limiting
w Programmable Circuit Breaker Mode:
Latched (Volatile or Nonvolatile)
w Programmable Duty Cycle Times
w Programmable Over-current Filter
l Programmable Host Voltage Fault Monitoring
w Programmable Under- voltage Hysteresis
w Programmable UV/OV Voltage Filter
w Programmable Fault Mode: Latched or Duty
Cycle
l Nonvolatile Programming to Customize Features
w Available Pre-programmed from Summit
l 2.5V and 5.0V Reference Outputs
w Eliminates the Need or Other Primary Volt-
ages
w Easy Expansion of External Monitor Func-
tions
l Supply Range ±20VDC to >±500VDC
SIMPLIFIED APPLICATION DRAWING
0V
Disable / Enable
Pin Detect
R3
R2
R1
Pin Detect
PD1#
VDD
ENPGA ENPGB
PG1#
UV
PG2#
SMH4803A
OV
PG3#
PD2#
DRAIN
FAULT#
VSS CBSENSE VGATE SENSE 2.5VREF 5.0VREF
DC/DC
DC/DC
DC/DC
–48V
2051 SAD 1.2
©SUMMIT MICROELECTRONICS, Inc., 2000 • 300 Orchard City Dr., Suite 131 • Campbell, CA 95008 • Phone 408-378-6461 • FAX 408-378-6586 • www.summitmicro.com
Characteristics subject to change without notice
2051 4.4 3/15/01
1
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