Rainbow-electronics MAX5943 Manual de usuario descargar pdf (Pagina 19)

MAX5943

FireWire Current Limiter and Low-Drop

ORing Switch Controller

______________________________________________________________________________________ 19

Chip Information

TRANSISTOR COUNT: 2324

PROCESS: BiCMOS

SENSE GATE1

OR_ADJ ONQ1GND

MAX5943 EQUIVALENT CIRCUIT

LATCHILIM

FAULT

GATE2 OUT

Q1 Q2

LOAD DISCONNECT

SWITCH

VERY-LOW-DROP

ORing DIODE

CURRENT-LIMIT/CIRCUIT-BREAKER

AND INRUSH CONTROL

FireWire

PORT

FireWire

PORT

SUPPLY

MAX5943A

TIM

+ V

SENSE

Typical Operating Circuit

PART

CURRENT

LIMITER/

CIRCUIT

BREAKER

DEFAULT

TIMEOUT

(ms)

PROGRAMMABLE

TIMEOUT RANGE

MAX5943A

Current limit

1.04ms to 11.05ms

MAX5943B

Circuit breaker

0.5 32.5µs to 345µs

MAX5943C

Circuit breaker

1 65µs to 690µs

MAX5943D

Circuit breaker

130µs to 1.38ms

MAX5943E

Circuit breaker

260µs to 2.76ms

Selector Guide

30mΩ

SI7958DP SI7958DP

SENSE GATE1

OR_ADJ ONQ1GNDLATCHILIM

FAULT

GATE2 OUT

Q1 Q2

= 12V

FireWire

PORT

FireWire

PORT

SUPPLY

MAX5943A

TIM

4kΩ

10kΩ1kΩ

7.15kΩ

Typical Application Circuit

1 2 ... 14 15 16 17 18 19 20

ORing Switch Controller 1

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Rainbow-electronics MAX5943 Manual de usuario Pagina 19

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