SMH4812S datasheet(2/19 Pages) SUMMIT

2 / 19 page

SMH4812

2055 4.0 12/22/00

SUMMIT MICROELECTRONICS, Inc.

Preliminary

FUNCTIONAL BLOCK DIAGRAM

PROGRAMM-

ABLE

DELAY

PROGRAMM-

ABLE

DELAY

–

Programmable

Quick Response

Ref. Voltage

50mV

DUTY

CYCLE

TIMER

FILTER

–

2.5V

12V

VGATE

SENSE

–

VDD

VSS

CBSENSE

EN/TS

PD1#

PD2#

ENPG

2.5VREF

PG#

DRAIN

SENSE

VGATE

FAULT#

5.0VREF

12VREF

2055 BD 3.0

PROGRAMM-

ABLE

SHUTDOWN

TIMER

FS#

50k

Ω

50k

Ω

50k

Ω

50k

Ω

The SMH4812 is designed to control hot swapping of plug-

in cards operating from a single supply, which can have an

output range from 20V to 500V. The SMH4812 hot-swap

controller provides under-voltage and over-voltage moni-

toring of the host power supply, it drives an external power

MOSFET switch that connects the supply to the load, and

it protects against over-current conditions that might dis-

rupt the host supply. When the input and output voltages

to the SMH4812 controller are within specification it pro-

DESCRIPTION

vides a Power Good logic output that may be used to

enable a DC-DC converter. Additional features of the

device include:

temperature sense or master enable

input, 2.5V and 5V reference outputs for expanding moni-

tor functions, two Pin-Detect enable inputs for fault protec-

tion, and duty-cycle or latched over-current protection

modes. All of these features can be programmed by the

factory according to the user's requirements.

SMH4812S Datasheet(PDF) 2 Page - Summit Microelectronics, Inc.

SMH4812S Datasheet(HTML) 2 Page - Summit Microelectronics, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Datasheet Download

Link URL