特性 Features

? Integrates Three Major Functions

- Power Sequencing

- Hot Swap Controller

- System Management Functions

? Penta-Power Sequencing

- Sequence up to 5 DC/DC converters.

- Four independent voltage enable pins

- Four time delay circuits

- Soft Power Sequencing - MRC pin restarts sequence

without power cycling.

? Hot Swap Controller

- Programmable overvoltage and undervoltage protection

- Undervoltage lockout for battery/redundant supplies

- Electronic circuit breaker - Overcurrent Detection and

Gate Shut-off

- Overcurrent limit during Insertion

- Hardshort retry with retry failure flag

- Selectable gate current using IGQ pins (10, 70, 150μA)

- MRH pin controls board insertion/extraction.

- Typically operates from -30V to -80V. Tolerates

transients to -200V (limited by external components)

? System Management

- Reset output, with delay, holds off host until all supplies

are good

- Host control of reinsertion with MRH input

- Host control of resequencing using MRC input

? Available packages

- 32-lead Quad No-Lead Frame (QFN)

Applications

? -48V Hot Swap Power Backplane/Distribution Central

Office, Ethernet for VOIP

? Card Insertion Detection

? Power Sequencing DC/DC/Power Bricks

? IP Phone Applications

? Databus Power Interfacing

? Custom Industrial Power Backplanes

? Distributed Power Systems