MAX5969A
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MAX5969A

IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated Power MOSFET

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IEEE 802.3af/at-Compliant Power-Device Interface Controllers Target PoE+ Applications

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Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.49
Features
  • IEEE 802.3af/at Compliant
  • 2-Event Classification
  • Simplified Wall Adapter Interface
  • PoE Classification 0 to 5
  • 100V Input Absolute Maximum Rating
  • Inrush Current Limit of 180mA Maximum
  • Current Limit During Normal Operation Between 720mA and 880mA
  • Current Limit and Foldback
  • Legacy UVLO at 36V (MAX5969A)
  • IEEE 802.3af/at-Compliant, 40V UVLO (MAX5969B)
  • Overtemperature Protection
  • Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN
Additional Details
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The MAX5969A/MAX5969B provide a complete interface for a powered device (PD) to comply with the IEEE® 802.3af/at standard in a power-over-Ethernet (PoE) system. The MAX5969A/MAX5969B provide the PD with a detection signature, classification signature, and an integrated isolation power switch with inrush current control. During the inrush period, the MAX5969A/MAX5969B limit the current to less than 180mA before switching to the higher current limit (720mA to 880mA) 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 conditions. The MAX5969A/MAX5969B can withstand up to 100V at the input.

The MAX5969A/MAX5969B support a 2-event classification method as specified in the IEEE 802.3at standard and provide a signal to indicate when probed by 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 MAX5969A/MAX5969B also provide a power-good (PG) signal, two-step current limit and foldback, overtemperature protection, and di/dt limit.

The MAX5969A/MAX5969B are available in a space-saving, 10-pin, 3mm × 3mm, TDFN power package. These devices are rated over the -40°C to +85°C extended temperature range.

Applications

  • IEEE 802.3af/at Powered Devices
  • IP Phones, Wireless Access Nodes, IP Security Cameras
  • WiMAX™ Base Station
Part Models 2
1ku List Price Starting From $2.49

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX5969AETB+
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Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX5969AETB+

PRODUCTION

MAX5969AETB+T

PRODUCTION

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Product Lifecycle

PCN

Jun 20, 2016

- 1612

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ASSEMBLY

MAX5969AETB+

PRODUCTION

MAX5969AETB+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

MAX5969BEVKIT

Evaluation Kit for the MAX5969A and MAX5969B

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MAX5969BEVKIT

Evaluation Kit for the MAX5969A and MAX5969B

Evaluation Kit for the MAX5969A and MAX5969B

Features and Benefits

  • IEEE 802.3af/at-Compliant PD Interface Circuit
  • -30V to -57V Input Range
  • Demonstrates an Isolated +12V/22.7W Flyback DC-DC Converter
  • PD Detection and Configurable Classification Signatures
  • 2-Event Classification or Wall Adapter Detect Output
  • Power-Good Indicator Output
  • In-Rush Current Limit of 180mA (max)
  • Evaluates Endspan and Midspan Ethernet Systems
  • Evaluates the MAX5969B/MAX5969A in a 10-Pin TDFN Package
  • Simplified Wall Adapter Interface
  • Fully Assembled and Tested

Product Detail

The MAX5969B evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board featuring an Ethernet port, network powered-device (PD) interface-controller circuit for IEEE® 802.3af/at-compliant power-over-Ethernet (PoE) systems. The EV kit features the MAX5969B IEEE 802.3af/at-compliant network PD interface controller IC in a 10-pin TDFN package. The MAX5969B is used in PoE applications requiring DC power from an Ethernet network port for PDs such as IP phones, wireless access nodes, and security cameras.

The EV kit receives power from IEEE 802.3af/at-compliant power-sourcing equipment (PSE). Refer to the MAX5965 and MAX5971 IC data sheets for PSE controllers. The PSE provides the required -30V 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 1GbE RJ45 magnetic jack and two diode bridges for separating the DC power provided by an endspan or midspan Ethernet system.

The EV kit can also be powered by a wall adapter power source. The EV kit provides PCB pads to accept the output of a wall adapter power source. 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.

The EV kit demonstrates the full functionality of the IC, such as PD detection signature, PD classification signature, in-rush current control, and input undervoltage lockout (UVLO). The EV kit also provides a modular RJ45 jack to interface with the Ethernet data signals only.

The EV kit also features a galvanically isolated 22.7W, 600kHz switching frequency flyback DC-DC converter, which uses the MAX15000A current-mode PWM controller. The IC's output provides power for the converter circuit. The DC-DC converter is configured for an output voltage of +12V and provides up to 1.9A. High efficiency up to 89% is achieved using a single transistor flyback DC-DC converter topology. The surface-mount transformer provides up to +1500V galvanic isolation for the output. UVLO, soft-start, and thermal shutdown provide a robust 22.7W isolated power supply. The DC-DC converter operates at 600kHz, allowing the use of small magnetics and output capacitors. The EV kit can also evaluate the MAX5969A after IC replacement (U1).

Applications

  • IEEE 802.3af/at Powered Devices
  • IP Phones, Wireless Access Nodes, IP Security Cameras
  • WiMAX™ Base Station

MAX5969AEVKIT

Evaluation Kit for the MAX5969A and MAX5974A

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MAX5969AEVKIT

Evaluation Kit for the MAX5969A and MAX5974A

Evaluation Kit for the MAX5969A and MAX5974A

Features and Benefits

  • IEEE 802.3af/at-Compliant PD Interface Circuit
  • -36V to -57V Startup Input Voltage Range
  • 92% (typ) Efficiency
  • Demonstrates Isolated 12W Flyback DC-DC Converter
  • Isolated +12V Output at 1A
  • 300kHz Switching Frequency
  • Configurable for Optocoupler Feedback Operation
  • Scalable to 12V Class 4 PD
  • PD Detection and Configurable Classification Signatures
  • 2-Event Classification or Wall Adapter Detect Output
  • Inrush Current Limit of 135mA (typ)
  • Internal UVLO at -35.6V (typ)
  • Evaluates Endspan and Midspan Ethernet Systems
  • Simplified Wall Adapter Interface
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

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-performance, 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, synchronous-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® 802.3af/at-compliant 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 separating 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.

Applications

  • IEEE 802.3af/at Powered Devices
  • IP Phones, Wireless Access Nodes, IP Security Cameras
  • WiMAX™ Base Station
Reference Designs

Reference Designs 6

MAXREFDES138

No-Opto Isolated, PoE, 48V to 12V, 12W Flyback Power Supply

maxrefdes98fig05

Non-isolated 5V/2.5A PoE Powered Device Power Supply

maxrefdes128fig02

No-Opto Isolated, PoE, 48V to 5V, 12.5W Flyback Power Supply

maxrefdes108fig02

Non-isolated 12V/1A PoE Powered Device Power Supply

MAXREFDES1149

12V/1A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

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MAXREFDES1149

12V/1A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

12V/1A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

Features and Benefits

  • Features
  • IEEE® 802.3af/at Compliance
  • 2-Event Classification
  • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
  • Ultra-Compact Layout
  • Peak Efficiency > 88%
  • 3mm × 3mm, 16-Pin TQFN (MAX17690), 6-Lead SOT23 (MAX17606), and Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN (MAX5969A) Packages
View Detailed Reference Design external link

Design & Integration Tools

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3.54 M

maxrefdes1148 figure 1

MAXREFDES1148: 5V/2.5A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

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MAXREFDES1148

MAXREFDES1148: 5V/2.5A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

MAXREFDES1148: 5V/2.5A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

Features and Benefits

  • IEEE® 802.3af/at Compliance
  • 2-Event Classification
  • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
  • Ultra-Compact Layout
  • Peak Efficiency > 88%
  • 3mm × 3mm, 16-Pin TQFN (MAX17690), 6-Lead SOT23 (MAX17606), and Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN (MAX5969A) Packages
View Detailed Reference Design external link

Design & Integration Tools

pdf icon

ZIP

9.79 M

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