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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5980 Datasheet

IEEE 802.3at/af PSE Controller

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19-5568; Rev 1; 9/11
Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
General Description
The MAX5980 is a quad, power-sourcing equipment
(PSE) power controller designed for use in IEEE®
802.3at/af-compliant PSE. This device provides powered
device (PD) discovery, classification, current limit, and
load disconnect detection. The device supports both
fully automatic operation and software programmability.
The device also supports new 2-event classification and
Class 5 for detection and classification of high-power
PDs. The device supports single-supply operation, pro-
vides up to 70W to each port (Class 5 enabled), and still
provides high-capacitance detection for legacy PDs.
The device features an I2C-compatible, 3-wire serial
interface, and is fully software configurable and pro-
grammable. The device provides instantaneous readout
of port current and voltage through the I2C interface. The
device’s extensive programmability enhances system
flexibility, enables field diagnosis, and allows for uses in
other, nonstandard applications.
The device is available in a space-saving, 32-pin TQFN
(5mm x 5mm) power package and is rated for the auto-
motive (-40NC to +105NC) temperature range.
IEEE is a registered service mark of the Institute of Electrical and
Electronics Engineers, Inc.
Features
S IEEE 802.3at/af Compliant
S 0.25I Current-Sensing Resistor
S Up to 70W per Port for PSE Applications
S 9-Bit Port Current and Voltage Monitoring
S I2C-Compatible, 3-Wire Serial Interface
S Supports Single-Supply Operation
S High-Capacitance Detection for Legacy Devices
S Supports DC Load-Removal Detections
S Space-Saving, 32-Pin TQFN (5mm x 5mm) Power
Package
Applications
PSE-ICM
Power-Sourcing Equipment (PSE)
Switches/Routers
Midspan Power Injectors
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5980GTJ+
-40NC to +105NC
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Simplified Operating Circuit
AGND
EN -54V VDD
EN
AUTO
MIDSPAN
EN_CL5
A0
A1
A2
A3
MAX5980
OUT1
GATE1
OUT2
GATE2
OUT3
GATE3
OUT4
GATE4
PORT 1
OUTPUT
PORT 2
OUTPUT
PORT 3
OUTPUT
PORT 4
OUTPUT
-54V
________________________________________________________________ Maxim Integrated Products   1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5980 Datasheet

IEEE 802.3at/af PSE Controller

No Preview Available !

Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to VEE, unless otherwise noted.)
AGND.....................................................................-0.3V to +80V
DGND, SVEE_.......................................................-0.3V to +0.3V
VDD........................ -0.3V to the lower (VAGND + 0.3V) and +4V
OUT_.....................................................-0.3V to (VAGND + 0.3V)
GATE_, SENSE_.....................................................-0.3V to +22V
A3, A2, A1, A0, MIDSPAN, EN_CL5, AUTO,
INT, SCL, SDAIN, SDAOUT, EN to DGND...........-0.3V to +6V
Maximum Current into INT and OUT..................................20mA
Maximum Current into OUT_.......................Internally Regulated
Continuous Power Dissipation (TA = +70NC)
32-Pin TQFN (derate 34.5mW/NC above +70NC)....2758.6mW
Package Thermal Resistance (Note 1)
BJA............................................................................. +29NC/W
BJC............................................................................ +1.7NC/W
Operating Temperature Range......................... -40NC to +105NC
Storage Temperature Range............................ -65NC to +150NC
Junction Temperature......................................................+150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VAGND = 32V to 60V, VEE = VDGND = 0V, TA = -40NC to +105NC. All voltages are referenced to VEE, unless otherwise noted. Typical
values are at VAGND = 54V, TA = +25NC, and default register settings. Currents are positive when entering the pin, and negative
otherwise.) (Note 2)
PARAMETER
POWER SUPPLIES
Operating Voltage Range
SYMBOL
CONDITIONS
VAGND VAGND - VEE
MIN TYP MAX UNITS
32 60 V
Supply Currents
VOUT_ = VSENSE_ = VEE; INT, SDAOUT,
IEE
and all logic inputs unconnected;
VSCL = VSDAIN = VDD; measured at AGND
in power mode after GATE_ pullup
5 7 mA
GATE DRIVER AND CLAMPING
GATE_ Pullup Current
IPU
GATE_ Pulldown Current
IPDW
Strong Pulldown Current
IPDS
External Gate Drive
VGS
CURRENT LIMIT AND OVERCURRENT
Power mode, gate drive on, VGATE_ = VEE
Port SHDN mode enabled;
VGATE_ = VEE + 10V
VSENSE_ = 500mV, VGATE_ = VEE + 2V
VGATE_ - VEE, power mode, gate-drive on
-40
8.5
-50 -60
40
25
9.5 10.5
FA
FA
mA
V
Current-Limit Clamp Voltage
VSU_LIM
Maximum VSENSE_
allowed during
current-limit
conditions,
VOUT_ = 0V (Note 3)
ILIM_ register
set to 80h,
Class 0–3
ILIM_ register
set to C0h,
Class 4
ILIM_ register
set to C0h,
Class 5
101 106.25 111.5
200 212.5 225
mV
405 430 455
2


Part Number MAX5980
Description IEEE 802.3at/af PSE Controller
Maker Maxim Integrated
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MAX5980 Datasheet PDF






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