SMH4803BHMP データシートの表示（PDF） - Summit Microelectronics

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SMH4803BHMP

Distributed Power Hot-Swap Controller

Summit Microelectronics 

Distributed Power Hot-Swap Controller

SMH4803

FEATURES

• Supply Range ±20VDC to >±500VDC

• Versatile Card Insertion Detection Supports

Both

– Multi-length Pin Systems

– Card Injector Switch Sensing

• Control Up to Four Loads or a Primary Load and

3 DC/DC Converters

• Highly Programmable Host Voltage Monitoring

– Programmable Under- and Over-voltage

Detection

• Programmable Power Good Delays for

Sequencing DC/DC Converters

• Programmable Circuit Breaker Function

– Programmable Over-current Filter

– Programmable Quick-Trip™ Circuit Breaker

Values

– Programmable Circuit Breaker Mode

• Duty-Cycle Mode

• Latched Mode

• 2.5V and 5.0V reference outputs

– Easy Expansion of External

Monitor Functions

Featuring

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ASSOCIATE

MEMBER

FUNCTIONAL BLOCK DIAGRAM

VDD

12V ref

ENPGB

PG3#

EN/TS

PD1#

PD2#

UV

Drain

Sense

OV

50kΩ

50kΩ

-

+

50kΩ

-

+

12V

+

-

Filter

-

+

Programmable

Delay

Programmable

Delay

ENPGA

PG2#

PG1#

2.5V ref

VSS

CBMode

CBReset#

CBSense

2.5V

5V

Programmable

Delay

Programmable

Quick-Trip

Ref Voltage

+

-

50

mV

+

-

Fault

Latch

&

Duty

Cycle

Timer

12V

current limit

Vgate

Sense

5.0V ref

Vgate

CBFault#

2041 BD 8.0

© SUMMIT MICROELECTRONICS, Inc. 2000 • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com

2041 8.4 6/15/00

Characteristics subject to change without notice

1

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