SMH4803AENP データシートの表示（PDF） - Summit Microelectronics

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SMH4803AENP

Distributed Power Hot-Swap Controller

Summit Microelectronics 

SMH4803

Symbol

Drain Sense

Vgate

EN/TS

PD1#

PD2#

CBFault#

CBReset#

CBMode

CBSense

Vss

UV

OV

5V

2.5V

ENPGB

ENPGA

PG3#

PG1#

PG2#

Vdd

Pin Description

PIN CONFIGURATIONS

1 Drain sense input

2 Output to MOSFET gate

3 Enable/Temp Sense input

Drain Sense 1

4 Pin Detect 1 (active LO)

Vgate 2

5 Pin Detect 2 (active LO)

6 Circuit Breaker Fault output

7 Circuit Breaker Reset intput

8 Circuit Breaker Mode control

EN/TS 3

PD1# 4

PD2# 5

9 Cicruit Breaker Sense input

CBFault# 6

10 Negative Supply Connection

11 Under Voltage input

12 Over Voltage input

13 5V reference output

CBReset# 7

CBMode 8

CBSense 9

14 2.5V reference output

15 Enable input B

Vss 10

16 Enable input A

17 Power good output 3

18 Power good output 1

19 Power good output 2

20 Positive supply connection

2041 PGM T2.1

RECOMMENDED OPERATING CONDITIONS

Condition

Temperature

Min

-40°C

20 Vdd

19 PG2#

18 PG1#

17 PG3#

16 ENPGA

15 ENPGB

14 2.5V

13 5V

12 OV

11 UV

2041 ILL10.1

Max

+85°C

2041 PGM T3.0

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.

2041 8.4 6/15/00

SUMMIT MICROELECTRONICS

2

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