MAX5982CEVKIT# Maxim Integrated, MAX5982CEVKIT# Datasheet

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MAX5982CEVKIT#

Manufacturer Part Number
MAX5982CEVKIT#
Description
Hot Swap & Power Distribution PD Interface Controller
Manufacturer
Maxim Integrated
Datasheet
1.MAX5982BETE.pdf (17 pages)

Specifications of MAX5982CEVKIT#

Rohs
yes
19-5960; Rev 0; 6/11
The MAX5982A/MAX5982B/MAX5982C provide a com-
plete interface for a powered device (PD) to comply with
the IEEE
(PoE) system. The MAX5982A/MAX5982B/MAX5982C
provide the PD with a detection signature, classifica-
tion signature, and an integrated isolation power switch
with inrush current control. During the inrush period,
the MAX5982A/MAX5982B/MAX5982C limit the current
to less than 182mA before switching to the higher cur-
rent limit (1700mA to 2100mA) when the isolation power
MOSFET is fully enhanced. The devices feature an input
UVLO with wide hysteresis and long deglitch time to
compensate for twisted-pair cable resistive drop and to
assure glitch-free transition during power-on/-off condi-
tions. The MAX5982A/MAX5982B/MAX5982C can with-
stand up to 100V at the input.
The
2-Event classification method as specified in the IEEE
802.3at standard and provide a signal to indicate when
probed by a Type 2 power sourcing equipment (PSE).
The devices detect the presence of a wall adapter power
source connection and allow a smooth switchover from
the PoE power source to the wall power adapter.
The MAX5982A/MAX5982B/MAX5982C also provide a
power-good (PG) signal, two-step current limit and fold-
back, overtemperature protection, and di/dt limit. A sleep
mode feature in the MAX5982A/MAX5982B provides low
power consumption while supporting Maintain Power
Signature (MPS). An ultra-low-power sleep mode feature
in the MAX5982A/MAX5982B further reduces power
consumption while still supporting MPS. The MAX5982A/
MAX5982B also feature an LED driver that is automati-
cally activated during sleep mode.
The MAX5982A/MAX5982B/MAX5982C are available in
a 16-pin, 5mm x 5mm, TQFN power package. These
devices are rated over the -40NC to +85NC extended
temperature range.
WiMAX is a trademark of WiMAX Forum.
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.
Controllers with
IEEE 802.3af/at-Compliant, Powered Device Interface
MAX5982A/MAX5982B/MAX5982C
®
802.3af/at standard in a power-over-Ethernet
_______________________________________________________________ Maxim Integrated Products 1
General Description
Integrated 70W High-Power MOSFET
support
a
S Sleep Mode and Ultra-Low-Power Sleep
S IEEE 802.3af/at Compliant
S 2-Event Classification or an External Wall Adapter
S Simplified Wall Adapter Interface
S PoE Classification 0–5
S 100V Input Absolute Maximum Rating
S Inrush Current Limit of 182mA Maximum
S Current Limit During Normal Operation Between
S Current Limit and Foldback
S Legacy UVLO at 36V
S LED Driver with Programmable LED Current
S Overtemperature Protection
S Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN
Ordering Information
(MAX5982A/MAX5982B)
Indicator Output
1700mA and 2100mA
(MAX5982A/MAX5982B)
IEEE 802.3af/at Powered Devices
IP Phones, Wireless Access Nodes, IP Security
Cameras
WiMAXK Base Stations
appears at end of data sheet.
Applications
Features

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MAX5982CEVKIT# Summary of contents

Page 1

... WiMAX is a trademark of WiMAX Forum. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. _______________________________________________________________ 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. Integrated 70W High-Power MOSFET ...

Page 2

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with ABSOLUTE MAXIMUM RATINGS ..........................................................-0.3V to +100V DD SS DET, RTN, WAD, PG, 2EC to V ....................... -0.3V to +100V SS CLS, SL, WK, ULP, LED to V ...............................-0.3V to +6V ...

Page 3

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with ELECTRICAL CHARACTERISTICS (continued 48V 24.9kω DET voltages are referenced to V unless otherwise noted +25 C.) ...

Page 4

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with ELECTRICAL CHARACTERISTICS (continued 48V 24.9kω DET voltages are referenced to V unless otherwise noted +25 C.) ...

Page 5

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with ( 54V 24.9kω DET voltages are referenced SS. DETECTION CURRENT vs. INPUT VOLTAGE 0 ...

Page 6

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with ( 54V 24.9kω DET voltages are referenced SS. INRUSH CONTROL WAVEFORM WITH TYPE 2 CLASSIFICATION 20ms/div LED CURRENT ...

Page 7

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with N. MAX5982A DET 3 MAX5982B *EP I. TQFN PIN NAME MAX5982A/ MAX5982C MAX5982B 1 1, 13–16 N. ...

Page 8

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with PIN NAME MAX5982A/ MAX5982C MAX5982B 11 11 2EC 12 12 CLS 13 –– LED 14 –– –– –– ULP –– –– ______________________________________________________________________________________ Integrated 70W High-Power MOSFET 2-Event ...

Page 9

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with REGULATOR V DD 46µA DET SWITCH SWITCH 1 2.5kI WK 5V 50kI ULP _______________________________________________________________________________________ Integrated 70W High-Power MOSFET MAX5982A/MAX5982B Simplified ...

Page 10

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with REGULATOR V DD DET SWITCH SWITCH 10 _____________________________________________________________________________________ Integrated 70W High-Power MOSFET MAX5982C Simplified Block Diagram SET Q D ...

Page 11

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with GND RJ-45 AND BRIDGE R DET RECTIFIER 24.9kI DET 68nF CLS SMAJ58A R CLS V SS -54V WK LED -54V ______________________________________________________________________________________ Integrated 70W High-Power MOSFET V 2EC DD PG 2EC/WAD MAX5982A WAD MAX5982B ...

Page 12

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Detailed Description Operating Modes Depending on the input voltage (V MAX5982A/MAX5982B/MAX5982C operate in four differ- ent modes: PD detection, PD classification, mark event, and PD power. The devices enter PD detection mode when ...

Page 13

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Alternatively, the 2EC output also serves as a wall adapt- er detection output when the MAX5982A/MAX5982B/ MAX5982C are powered by an external wall power adapter. See the Wall Power Adapter Detection and Operation ...

Page 14

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Applications Information Operation with 12V Adapter Careful PCB layout is critical to achieve high efficiency and low EMI. Follow these layout guidelines for optimum performance: 1) Place the input capacitor, classification resistor, and ...

Page 15

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with GND -54V GND C BULK R IN RTN C IN RTN IN R DCLMP1 DCLMP2 DCLMP MAX5974C MAX5974D DITHER ...

Page 16

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with PART TEMP RANGE -40NC to +85NC MAX5982AETE+ MAX5982BETE+ -40NC to +85NC MAX5982CETE+ -40NC to +85NC +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Chip Information PROCESS: BiCMOS 16 _____________________________________________________________________________________ Integrated 70W High-Power MOSFET ...

Page 17

... Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products © ...

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