MAX5969B
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MAX5969B

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

Info: : PRODUCTION tooltip
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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Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX5969BETB+

PRODUCTION

MAX5969BETB+T

PRODUCTION

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PCN

Jun 20, 2016

- 1612

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ASSEMBLY

MAX5969BETB+

PRODUCTION

MAX5969BETB+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 7

MAXREFDES1175

PoE Powered Device and 5V/1.4A No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

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MAXREFDES1175

PoE Powered Device and 5V/1.4A No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

PoE Powered Device and 5V/1.4A No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

Features and Benefits

  • IEEE 802.3af/at Compliance
  • Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN Package (MAX5969B)
  • 30V to 60V Input Voltage Range
  • Programmable Switching Frequency from 50kHz to 250kHz
  • Programmable Input Enable/UVLO Feature
  • Programmable Input Overvoltage Protection
  • Adjustable Soft-Start
  • 2A/4A Peak Source/Sink Gate Drive Capability
  • Hiccup Mode Short-Circuit Protection
  • Fast Cycle-by-Cycle Peak Current Limit
  • Thermal Shutdown Protection
  • Space-Saving, 16-Pin, 3mm × 3mm TQFN Package
  • -40°C to +125°C Operating Temperature Range
View Detailed Reference Design external link

Design & Integration Tools

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2.75 M

maxrefdes1206-figure 1

PoE Powered Device and 24V/1A Active Clamp Forward DC-DC Converter Using the MAX5974C and MAX5969B

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MAXREFDES1206

PoE Powered Device and 24V/1A Active Clamp Forward DC-DC Converter Using the MAX5974C and MAX5969B

PoE Powered Device and 24V/1A Active Clamp Forward DC-DC Converter Using the MAX5974C and MAX5969B

Features and Benefits

  • Programmable Switching Frequency from 100kHz to 600kHz
  • Programmable Frequency Dithering for Low-EMI, Spread-Spectrum Operation
  • Programmable Dead Time, PWM Soft-Start, Current Slope Compensation
  • Programmable Feed-Forward Maximum Duty-Cycle Clamp, 80% Maximum Limit
  • Frequency Foldback for High-Efficiency Light-Load Operation
  • Internal Bootstrap UVLO with Large Hysteresis
  • 100μA (typ) Startup Supply Current
  • Fast Cycle-by-Cycle Peak Current-Limit, of 5V and35ns Typical Propagation Delay
  • 115ns Current-Sense Internal Leading-Edge Blanking
  • Output Short-Circuit Protection with Hiccup Mode
  • Reverse Current Limit to Prevent Transformer Saturation Due to Reverse Current
View Detailed Reference Design external link

Design & Integration Tools

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975.93 K

maxrefdes1177 figure 1

PoE Powered Device and 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

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MAXREFDES1177

PoE Powered Device and 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

PoE Powered Device and 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

Features and Benefits

  • IEEE 802.3af/at Compliance
  • Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN Package (MAX5969B)
  • 30V to 60V Input Voltage Range
  • Programmable Switching Frequency from 50kHz to 250kHz
  • Programmable Input Enable/UVLO Feature
  • Programmable Input Overvoltage Protection
  • Adjustable Soft-Start
  • 2A/4A Peak Source/Sink Gate Drive Capability
  • Hiccup Mode Short-Circuit Protection
  • Fast Cycle-by-Cycle Peak Current Limit
  • Thermal Shutdown Protection
  • Space-Saving, 16-Pin, 3mm × 3mm TQFN Package
  • -40°C to +125°C Operating Temperature Range
View Detailed Reference Design external link

Design & Integration Tools

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9.48 M

maxrefdes36-image1

3.3V and 5V PoE Powered Device

maxrefdes1176

PoE Powered Device and Synchronous 5V/1.4A No-Opto Flyback DC-DC Converter Using the MAX17690, MAX17606, and MAX5969B

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MAXREFDES1176

PoE Powered Device and Synchronous 5V/1.4A No-Opto Flyback DC-DC Converter Using the MAX17690, MAX17606, and MAX5969B

PoE Powered Device and Synchronous 5V/1.4A No-Opto Flyback DC-DC Converter Using the MAX17690, MAX17606, and MAX5969B

Features and Benefits

  • IEEE® 802.3af/at Compliance
  • Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN Package (MAX5969B)
  • 30V to 60V Input Voltage Range
  • Programmable Switching Frequency from 50kHz to 250kHz
  • Programmable Input Enable/UVLO Feature
  • Programmable Input Overvoltage Protection
  • Adjustable Soft-Start
  • 2A/4A Peak Source/Sink Gate Drive Capability
  • Hiccup Mode Short-Circuit Protection
  • Fast Cycle-by-Cycle Peak Current Limit
  • Thermal Shutdown Protection
  • Space-Saving, 16-Pin, 3mm x 3mm TQFN Package
  • -40°C to +125°C Operating Temperature Range
View Detailed Reference Design external link

Design & Integration Tools

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3.04 M

MAXREFDES1273

PoE Powered Device and 48V 850mA Active Clamp Forward DC DC Converter Using the MAX5974C and MAX5969B

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MAXREFDES1273

PoE Powered Device and 48V 850mA Active Clamp Forward DC DC Converter Using the MAX5974C and MAX5969B

PoE Powered Device and 48V 850mA Active Clamp Forward DC DC Converter Using the MAX5974C and MAX5969B

Features and Benefits

  • Programmable switching frequency from 100kHz to 600kHz
  • Programmable frequency dithering for low-EMI, spread-spectrum operation
  • Programmable dead time, PWM soft-start, current slope compensation
  • Programmable feed-forward maximum duty-cycle clamp, 80% maximum limit
  • Frequency foldback for high-efficiency light-load operation
  • Internal bootstrap UVLO with large hysteresis
  • 100μA (typ) startup supply current
  • Fast cycle-by-cycle peak current-limit, 35ns typical propagation delay
  • 115ns current-sense internal leading-edge blanking
  • Output short-circuit protection with hiccup mode
  • Reverse current limit to prevent transformer saturation due to reverse current
View Detailed Reference Design external link

Design & Integration Tools

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1.28 M

maxrefdes1178 image 1

PoE Powered Device and Synchronous 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690, MAX17606, and MAX5969B

zoomopens a dialog

MAXREFDES1178

PoE Powered Device and Synchronous 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690, MAX17606, and MAX5969B

PoE Powered Device and Synchronous 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690, MAX17606, and MAX5969B

Features and Benefits

  • IEEE® 802.3af/at Compliance
  • Thermally Enhanced, 3mm × 3mm, 10-Pin TDFN Package (MAX5969B)
  • 30V to 60V Input Voltage Range
  • Programmable Switching Frequency from 50kHz to 250kHz
  • Programmable Input Enable/UVLO Feature
  • Programmable Input Overvoltage Protection
  • Adjustable Soft-Start
  • 2A/4A Peak Source/Sink Gate Drive Capability
  • Hiccup Mode Short-Circuit Protection
  • Fast Cycle-by-Cycle Peak Current Limit
  • Thermal Shutdown Protection
  • Space-Saving, 16-Pin, 3mm x 3mm TQFN Package
  • -40°C to +125°C Operating Temperature Range
View Detailed Reference Design external link

Design & Integration Tools

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ZIP

3.12 M

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