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MAXREFDES1149: 12V/1A, Synchronous, No-Opto Isolated PoE DC-DC Converter Using MAX17690, MAX17606, MAX5969A

MAXREFDES1149

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Description

Power over Ethernet (PoE) is a technology that allows network cables to deliver power to a powered device (PD) via power-sourcing equipment (PSE) or midspan, and has many advantages over traditional methods of delivering power. The MAXREFDES1149 reference design is a 36V~57V input to 12V/1A output flyback PoE PD power module to be used in Ethernet equipment that needs the 12V power supply to be isolated from the primary Ethernet power. PoE allows power and data to be combined, removing the need for altering the AC mains infrastructure and can be installed by non-electricians. PoE is an intelligent system that is designed with protection at the forefront, preventing overload, underpowering, and installation errors, while allowing simple scalability and reliability. A high-efficiency, no-opto isolated flyback converter minimizes power loss with efficiencies greater than 89%, allowing reductions in excessive heat, longer IC lifetime, and maximum power available to the PD. Ultra-small packaging and no Schottky diode reduce the overall design size.

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

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Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.

 

Parametrics

Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 36 57 1 - 12 12 Isolated Flyback

Parametrics

Input Type DC
Vin(Min) 36
Vin(Max) 57
Iout(Max) 1
Single/Multiple Output -
Vout(V) 12
Pout(W) 12
Isolated/Non-Isolated Isolated
Topology Flyback

Maxim Devices (3)

Part Number Name Product Family Order Design kits and evaluation modules
MAX17690 60V, No-Opto Isolated Flyback Controller Isolated Power Buy Now Design Kits
MAX17606 Secondary-Side Synchronous MOSFET Driver for Flyback Converters Isolated Power Buy Now Design Kits
MAX5969A IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated Power MOSFET Complete System Power Protection IC Buy Now Design Kits

Maxim Devices (3)

Part Number Product Family
Isolated Power
60V, No-Opto Isolated Flyback Controller
Isolated Power
Secondary-Side Synchronous MOSFET Driver for Flyback Converters
Complete System Power Protection IC
IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated Power MOSFET

Design Files (4)

Title Type Size Date
maxrefdes1149-schematic PDF 24KB 2019-07-09
maxrefdes1149-test-results PDF 530KB 2019-07-09
maxrefdes1149-pcb PDF 2MB 2019-07-09
maxrefdes1149-bom PDF 223KB 2019-07-09
Date Type
2019-07-09

maxrefdes1149-schematic

(PDF, 24KB)

2019-07-09

maxrefdes1149-test-results

(PDF, 530KB)

2019-07-09

maxrefdes1149-pcb

(PDF, 2MB)

2019-07-09

maxrefdes1149-bom

(PDF, 223KB)

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