MAX5969AEVKIT# Maxim Integrated, MAX5969AEVKIT# Datasheet

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MAX5969AEVKIT#

Manufacturer Part Number
MAX5969AEVKIT#
Description
Power Management IC Development Tools MAX5969A Eval Kit
Manufacturer
Maxim Integrated
Series
MAX5969A, MAX5969Br
Datasheet

Specifications of MAX5969AEVKIT#

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The MAX5969A evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board featuring the
MAX5969A IEEE 802.3af/at-compliant network powered
device (PD) interface controller and the MAX5974A
inductive-feedback, spread-spectrum, current-mode
PWM controller. The EV kit is designed as a high-perfor-
mance, compact, and cost-efficient solution for a Class
3 (scalable to Class 4) PD used in Power-over-Ethernet
(PoE) applications.
The EV kit demonstrates the full functionality of the
MAX5969A, such as PD detection signature, PD
classification signature, inrush current control, and input
undervoltage lockout (UVLO). The EV kit also features
an isolated 12W, 300kHz switching-frequency, synchro-
nous-rectified flyback DC-DC converter topology, using
the MAX5974A inductive-feedback, current-mode PWM
controller. The EV kit circuit is configured for an output
voltage of +12V and provides up to 1A load current using
primary-side regulation. The surface-mount transformer
provides up to +1500V galvanic isolation for the output.
The EV kit receives power from IEEE
ant power-sourcing equipment (PSE). The PSE provides
the required -36V to -57V DC power over an unshielded
twisted-pair Ethernet network cable to the EV kit’s RJ45
magnetic jack. The EV kit features a 1 x 1Gb Ethernet
RJ45 magnetic jack and two full-bridge diodes for sepa-
rating the DC power provided by an endspan or midspan
Ethernet system.
The EV kit circuit can also be powered by a +36V to
+57V wall adapter power source, applied at the WAD_IN
and WAD_GND PCB pads. When a wall adapter power
source is detected, it always takes precedence over the
PSE source, allowing the wall adapter to power the EV kit.
Warning: The EV kit is designed to operate with high
voltages. Dangerous voltages are present on this EV kit
and on equipment connected to it. Users who power up
this EV kit or the power sources connected to it must be
careful to follow safety procedures appropriately to work
with high-voltage electrical equipment.
Under severe fault or failure conditions, this EV kit may
dissipate large amounts of power, which could result in
the mechanical ejection of a component or of component
debris at high velocity. Operate this kit with care to avoid
possible personal injury.
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.
_________________________________________________________________ Maxim Integrated Products 1
General Description
M
802.3af/at-compli-
Evaluates: MAX5969A/MAX5974A
MAX5969A Evaluation Kit
S IEEE 802.3af/at-Compliant PD Interface Circuit
S -36V to -57V Startup Input Voltage Range
S 92% (typ) Efficiency
S Demonstrates Isolated 12W Flyback DC-DC
S Isolated +12V Output at 1A
S 300kHz Switching Frequency
S Configurable for Optocoupler Feedback Operation
S Scalable to 12V Class 4 PD
S PD Detection and Configurable Classification
S 2-Event Classification or Wall Adapter Detect
S Inrush Current Limit of 135mA (typ)
S Internal UVLO at -35.6V (typ)
S Evaluates Endspan and Midspan Ethernet
S Simplified Wall Adapter Interface
S Proven PCB Layout
S Fully Assembled and Tested
Ordering Information
Converter
Signatures
Output
Systems
appears at end of data sheet.
19-5194; Rev 0; 10/11
Features

Related parts for MAX5969AEVKIT#

MAX5969AEVKIT# Summary of contents

Page 1

... Operate this kit with care to avoid possible personal injury. 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. MAX5969A Evaluation Kit Evaluates: MAX5969A/MAX5974A S IEEE 802 ...

Page 2

... C14 1 capacitor (0603) Murata GRM188R71E103K 0.047FF, 16V X7R ceramic C15 1 capacitor (0402) Murata GRM155R71E473K 100pF, 50V X7R ceramic C16 1 capacitor (0402) Murata GRM1555C1H101J _________________________________________________________________ Maxim Integrated Products 2 Evaluates: MAX5969A/MAX5974A DESIGNATION C19 C20, C22 C23 C24–C29 C31 D1 ...

Page 3

... R43, R44, R45, 0 Not installed, resistors (0603) R47–R54, R56 R18 1 4.02kI Q1% resistor (0603) MagJack is a registered trademark of Bel Fuse Inc. _________________________________________________________________ Maxim Integrated Products 3 Evaluates: MAX5969A/MAX5974A DESCRIPTION DESIGNATION R20, R22, R23, R24, R40, R55 R21, R25 R30–R33 TP1, VDD ...

Page 4

... Activate the PSE power supply or turn on the external DC power supply. 3) Using a voltmeter, verify that the EV kit provides +12V across the VOUT and PGND PCB pads. PGND is galvanically isolated from the EV kit’s input V+ and WAD_IN PCB pads. _________________________________________________________________ Maxim Integrated Products 4 Evaluates: MAX5969A/MAX5974A PHONE 843-946-0238 201-432-0463 631-435-1110 ...

Page 5

... Resistors R27 and R28 are available for adjusting the EV kit wall adapter voltage for disabling the PSE source. _________________________________________________________________ Maxim Integrated Products 5 Evaluates: MAX5969A/MAX5974A If the wall adapter power source is below +27V, the PSE provides power through the device’s RTN after a suc- cessful detection and classification ...

Page 6

... Figure 1a. MAX5969A EV Kit Schematic (Sheet _________________________________________________________________ Maxim Integrated Products 6 Evaluates: MAX5969A/MAX5974A ...

Page 7

... Figure 1b. MAX5969A EV Kit Schematic (Sheet _________________________________________________________________ Maxim Integrated Products 7 Evaluates: MAX5969A/MAX5974A ...

Page 8

... Figure 2. MAX5969A EV Kit Component Placement Guide— Component Side Figure 3. MAX5969A EV Kit PCB Layout—Component Side _________________________________________________________________ Maxim Integrated Products 8 Evaluates: MAX5969A/MAX5974A 1.0” Figure 4. MAX5969A EV Kit PCB Layout—Ground Layer 2 1.0” Figure 5. MAX5969A EV Kit PCB Layout—VCC Layer 3 1.0” 1.0” ...

Page 9

... Figure 6. MAX5969A EV Kit PCB Layout—Solder Side _________________________________________________________________ Maxim Integrated Products 9 Evaluates: MAX5969A/MAX5974A 1.0” Figure 7. MAX5969A EV Kit Component Placement Guide— Solder Side 1.0” ...

Page 10

... Ordering Information PART MAX5969AEVKIT# #Denotes RoHS compliant. ________________________________________________________________ Maxim Integrated Products 10 Evaluates: MAX5969A/MAX5974A TYPE EV Kit ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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