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SMH4803BENP Datasheet(PDF) 2 Page - Summit Microelectronics, Inc.

Part # SMH4803BENP
Description  Distributed Power Hot-Swap Controller
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Manufacturer  SUMMIT [Summit Microelectronics, Inc.]
Direct Link  http://www.summitmicro.com
Logo SUMMIT - Summit Microelectronics, Inc.

SMH4803BENP Datasheet(HTML) 2 Page - Summit Microelectronics, Inc.

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SMH4803
2041 8.4 6/15/00
SUMMIT MICROELECTRONICS
Symbol
Pin
Description
Drain Sense
1
Drain sense input
Vgate
2
Output to MOSFET gate
EN/TS
3
Enable/Temp Sense input
PD1#
4
Pin Detect 1 (active LO)
PD2#
5
Pin Detect 2 (active LO)
CBFault#
6
Circuit Breaker Fault output
CBReset#
7
Circuit Breaker Reset intput
CBMode
8
Circuit Breaker Mode control
CBSense
9
Cicruit Breaker Sense input
Vss
10
Negative Supply Connection
UV
11
Under Voltage input
OV
12
Over Voltage input
5V
13
5V reference output
2.5V
14
2.5V reference output
ENPGB
15
Enable input B
ENPGA
16
Enable input A
PG3#
17
Power good output 3
PG1#
18
Power good output 1
PG2#
19
Power good output 2
Vdd
20
Positive supply connection
2041 PGM T2.1
PIN CONFIGURATIONS
RECOMMENDED OPERATING CONDITIONS
Condition
Min
Max
Temperature
-40°C
+85°C
2041 PGM T3.0
1
2
3
4
5
6
7
8
9
10
16
15
14
13
12
11
19
20
17
18
2041 ILL10.1
Drain Sense
Vgate
EN/TS
PD1#
PD2#
CBFault#
CBReset#
CBMode
CBSense
Vss
Vdd
PG2#
PG1#
PG3#
ENPGA
ENPGB
2.5V
5V
OV
UV
DESCRIPTION
The SMH4803 is designed to control hot swapping of
plug-in cards operating from a single supply ranging from
20V to 500V. The SMH4803 hot-swap controller provides
under-voltage and over-voltage monitoring of the host
power supply, it drives an external power MOSFET switch
that connects the supply to the load, and also protects
against over-current conditions that might disrupt the host
supply. When the input and output voltages to the
SMH4803 controller are within specification, the
SMH4803 provides three “Power Good” logic outputs that
may be used to turn ON the loads, e.g. isolated-output DC-
DC converters, or drive LED status lights. The SMH4803
provides three separate “Power Good” logic outputs that
activate loads in a timed sequence. Additional features of
the SMH4803 include: temperature sense or master en-
able input, 2.5V and 5V reference outputs for expanding
monitor functions, two “Pin-Detect” enable inputs for fault
protection, and duty-cycle or latched over-current protec-
tion modes.


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