Maxim > Products > Hot-Swap, PoE, and Power Switching > MAX5952

MAX5952

High-Power, Quad, PSE Controller for Power-Over-Ethernet

Meets IEEE 802.3at Standard and Delivers Up to 45W for High-Power (POE+) PSE Applications

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX5952 is a quad -48V power controller designed for use in IEEE® 802.3af-compliant/pre-IEEE 802.3at-compatible power-sourcing equipment (PSE). This device provides powered device (PD) discovery, classification, current limit, DC and AC load disconnect detections in compliance with the IEEE 802.3af standard. The MAX5952 is pin compatible with MAX5945/LTC4258/LTC4259A PSE controllers and provides additional features.

The MAX5952 features high-power mode that provides up to 45W per port. The MAX5952 provides instantaneous readout of each port current through the I²C interface. The MAX5952 also provides high-capacitance detection for legacy PDs.

The device features an I²C-compatible, 3-wire serial interface, and is 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 MAX5952's extensive programmability enhances system flexibility, enables field diagnosis, and allows for uses in other applications.

The MAX5952 provides four operating modes to suit different system requirements. Auto mode allows the device 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 software control of the device and is useful for system diagnostics. Shutdown mode terminates all activities and securely turns off power to the ports.

The MAX5952 provides input undervoltage lockout (UVLO), input undervoltage detection, input overvoltage lockout, overtemperature detection, output voltage slew-rate limit during startup, power-good status, and fault status. The MAX5952's programmability includes startup timeout, overcurrent timeout, and load-disconnect detection timeout.

The MAX5952 is available in a 36-pin SSOP package and is rated for both extended (-40°C to +85°C) and upper commercial (0°C to +85°C) temperature ranges.

Data Sheet

Download	Rev 1	(PDF, 1012kB)
E-Mail

An evaluation kit is available: MAX5952AEVCMAXQU, MAX5952AEVKIT

Key Features

IEEE 802.3af Compliant/Pre-IEEE 802.3at Compatible
Instantaneous Readout of Port Current Through I²C Interface
High-Power Mode Enables Up to 45W Per Port
High-Capacitance Detection for Legacy Devices
Pin Compatible to MAX5945 and LTC4258/LTC4259A
Four Independent Power-Switch Controllers
PD Detection and Classification
Supports Both DC and AC Load Removal Detections
I²C-Compatible, 3-Wire Serial Interface
Current Foldback and Duty-Cycle-Controlled Current Limit
Open-Drain Active-Low INT Signal
Direct Fast Shutdown Control Capability

Applications/Uses

Midspan Power Injectors
Power-Sourcing Equipment (PSE)
Switches/Routers

Key Specifications:

Power Sourcing Equipment

Part Number

IEEE Compliance

High Power Mode

Channels

Port Current Readout

Load Disconnect

Program-
mability

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Budgetary Price

max w/pins

See Notes

MAX5952

802.3af

Pre-803.3at

Yes

I²C

AC/DC

I²C

SSOP/36

163.4

-40 to +85

0 to +85

$9.44 @1k

See All Power Sourcing Equipment (8)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Reliability Reports

Reliability Report:	MAX5952.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5952AEAX+			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952AEAX+CK8			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952AEAX+T			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952AUAX+			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	0°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952AUAX+T			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	0°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952CEAX+			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952CEAX+T			Active	SSOP; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5952CUAX+			Active	SSOP;36 pin;163.4 mm² Outline Drawing:21-0040 (PDF) Land Pattern: 90-0098 (PDF) Use pkgcode/variation: A36MK+4*	0°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5952CUAX+T			Active	SSOP; Land Pattern: Not Available	0°C to +85°C	See data sheet

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
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Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.