max5965a Maxim Integrated Products, Inc., max5965a Datasheet

max5965a

Manufacturer Part Number

max5965a

Description

High-power, Quad, Monolithic, Pse Controllers For Power Over Ethernet

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX5965A.pdf (53 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

max5965aEAX+

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Maxim Integrated Products

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Bonase Electronics (HK) Co., Limited

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The MAX5965A/MAX5965B are quad, monolithic, -48V

power controllers designed for use in IEEE

pliant/pre-IEEE 802.3at-compatible power-sourcing equip-

ment (PSE). These devices provide powered device (PD)

discovery, classification, current limit, DC and AC load dis-

connect detections in compliance with the IEEE 802.3af

standard. The MAX5965A/MAX5965B are pin compatible

with the MAX5952/MAX5945/LTC4258/LTC4259A PSE

controllers and provide additional features.

The MAX5965A/MAX5965B feature a high-power mode

that provides up to 45W per port. The MAX5965A/

MAX5965B provide new Class 5 and 2-event classifica-

tion (Class 6) for detection and classification of high-

power PDs. The MAX5965A/MAX5965B provide

instantaneous readout of each port current through the

high-capacitance detection for legacy PDs.

These devices feature an I

face, and are fully software configurable and programmable.

The class-overcurrent detection function enables system

power management to detect if a PD draws more than the

allowable current. The MAX5965A/MAX5965B’s extensive

programmability enhances system flexibility, enables field

diagnosis, and allows for uses in other applications.

The MAX5965A/MAX5965B provide four operating modes

to suit different system requirements. Auto mode allows

the devices to operate automatically without any software

supervision. Semi-automatic mode automatically detects

and classifies a device connected to a port after initial

software activation, but does not power up that port until

instructed to by software. Manual mode allows total soft-

ware control of the device and is useful for system diag-

nostics. Shutdown mode terminates all activities and

securely turns off power to the ports.

The MAX5965A/MAX5965B provide input undervoltage

lockout (UVLO), input undervoltage detection, a load-

stability safety check during detection, input overvolt-

age lockout, overtemperature detection, output voltage

slew-rate limit during startup, power-good status, and

fault status. The MAX5965A/MAX5965B’s programma-

bility includes startup timeout, overcurrent timeout, and

load-disconnect detection timeout.

The MAX5965A/MAX5965B are available in a 36-pin SSOP

package and are rated for both extended (-40°C to +85°C)

and upper commercial (0°C to +85°C) temperature ranges.

19-4593; Rev 1; 1/10

IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

C interface. The MAX5965A/MAX5965B also provide

High-Power, Quad, Monolithic, PSE Controllers

Power-Sourcing Equipment (PSE)

Switches/Routers

Midspan Power Injectors

________________________________________________________________ Maxim Integrated Products

General Description

C-compatible, 3-wire serial inter-

Applications

802.3af-com-

for Power over Ethernet

o IEEE 802.3af Compliant/Pre-IEEE 802.3at

o Instantaneous Readout of Port Current Through

o High-Power Mode Enables Up to 45W Per Port

o High-Capacitance Detection for Legacy Devices

o Pin Compatible with MAX5952/MAX5945/

o Four Independent Power-Switch Controllers

o PD Detection and Classification (Including 2-

o Selectable Load-Stability Safety Check During

o Supports Both DC and AC Load Removal

o I

o Current Foldback and Duty-Cycle-Controlled

o Open-Drain INT Signal

o Direct Fast Shutdown Control Capability

o Special Class 5 Classification

+ Denotes a lead(Pb)-free/RoHS-compliant package.

* Future product—contact factory for availability.

Pin Configuration appears at end of data sheet.

MAX5965AEAX+

MAX5965AUAX+

MAX5965BEAX+

MAX5965BUAX+

MAX5965AEAX+

MAX5965AUAX+*

MAX5965BEAX+

MAX5965BUAX+*

Compatible

LTC4258/LTC4259A

Event Classification)

Detection

Detections

Current Limit

C Interface

C-Compatible, 3-Wire Serial Interface

PART

-40°C to +85°C

PIN-PACKAGE

TEMP RANGE

36 SSOP

Ordering Information

0°C to +85°C

Selector Guide

AC DISCONNECT

PIN-PACKAGE

36 SSOP

Features

FEATURE

Yes

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