Si3400

Features: · IEEE 802.3 standard-compliant solution, including pre-standard (legacy) PoE support· Highly-integrated IC enables compact solution footprints· Minimal external components· Integrated diode bridges and transient surge suppressor· Integrated switching regulator controller with on-chip po...

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Si3400 Picture
SeekIC No. : 004490119 Detail

Si3400: Features: · IEEE 802.3 standard-compliant solution, including pre-standard (legacy) PoE support· Highly-integrated IC enables compact solution footprints· Minimal external components· Integrated dio...

floor Price/Ceiling Price

Part Number:
Si3400
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/13

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Product Details

Description



Features:

·  IEEE 802.3 standard-compliant solution, including pre-standard (legacy) PoE support
·  Highly-integrated IC enables compact solution footprints
·  Minimal external components
·  Integrated diode bridges and transient surge suppressor
·  Integrated switching regulator controller with on-chip power FET
·  Integrated dual current-limited hotswap switch
·  Support non-isolated and isolated switching topologies
·  Comprehensive protection circuitry
·  Transient overvoltage protection
·  Undervoltage lockout
·  Early power-loss indicator
·  Thermal shutdown protection
·  Foldback current limiting
·  Programmable classification circuit
·  Low-profile 5 x 5 mm 20-pin QFN
·  Pb-Free and RoHS-compliant



Application

·Voice over IP telephones and adapters
·Wireless access points
·Security cameras
·Point-of-sale terminals
·Internet appliances
·Network devices
·High power applications (Si3401)



Pinout

  Connection Diagram


Description

The Si3400 and Si3401 integrate all power management and control functions required in a Power-over-Ethernet (PoE) powered device (PD) application. They convert the high voltage supplied over the 10/100/1000BASE-T Ethernet connection into a regulated, low-voltage output supply. The optimized architectures of the Si3400 and Si3401 minimize the solution footprint, reduce external BOM cost, and enable the use of low-cost external components while maintaining high performance. The Si3400 and Si3401 integrate the required diode bridges and transient surge suppressors, thus enabling direct connection of ICs to the Ethernet RJ-45 connector. The switching power FET and all associated functions are also integrated. The integrated switching regulator supports isolated (flyback) and non-isolated (buck) converter topologies. The Si3400 and Si3401 support IEEE STD™ 802.3-2005 (future instances are referred to as 802.3) compliant solutions as well as pre-standard products, all in a single IC. Standard external resistors connected to the devices provide the proper 802.3 signatures for the detection function and programming of the classification mode. Startup circuits ensure well-controlled initial operation of both the hotswap switch and the voltage regulator. They are available in low-profile, 20-pin, 5 x 5 mm QFN packages. While the Si3400 is designed for applications up to 10 W, the Si3401 is optimized for higher power applications (up to approximately 15 W). See also "AN313: Using the Si3400/01 in High Power Applications" for more information.




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