Quasi-resonant Controller

This demonstration board is a Power over Ethernet (PoE) system used to transmit electrical power, along with data, to remote devices over a standard twisted-pair cable in an Ethernet network. The power supply fully complies with IEEE 802.3-2005 PoE specifications and delivers the rated output from any compliant source.

Outputs of 3.3 V and 12 V are used as examples in this document, but other requirements can be easily met with minor changes. The IEEE 802.3af specification is intended to greatly simplify the wiring to remote equipment by providing power over the same medium that carries the signal to and from the equipment. This concept is particularly suitable for applications such as security cameras, wireless access points, and internet telephones (VoIP). The cable voltage was selected so that existing 48 V telecom equipment could be used to supply the power without requiring DC-DC conversion.

Key Features

  • Useful output voltages12 V @0.65 A output (7.8 W, loose tolerance)3.3 V @0.65 A output (2.145 W, tight tolerance)
  • Economical output power (total power at output approximately 10 W)
  • Low profile, small size: 5\" x 1.5\" x 0.65\" (0.5\" except RJ-45 Ethernet connectors)
  • Respects source limitations
  • Complies with all IEEE 802.3-2005 (IEEE 802.3af) PoE specifications
  • 1500 V isolated outputs eliminate ground loops
  • Increased cost-effectiveness due to SMT construction (through-hole connectors for ruggedness)
  • Does not pollute power source

Circuit Diagram

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Design

Technical Documentation

Product Specifications
Description Version Size
DS2176 DS2176: Quasi-resonant SMPS controller 5.3 249 KB
Application Notes
Description Version Size
AN2936 AN2936: 10 W SMPS with HV power MOSFET and the L6565 for three-phase industrial applications 1.1 301 KB
AN2844 AN2844: 15 W wide range SMPS for metering based on ESBT™ STC03DE220HV and L6565 PWM controller 1.1 1 MB
AN1376 AN1376: 25W quasi-resonant flyback converter for set-top box application using the L6565 2.2 1 MB
AN1439 AN1439: 30 W AC-DC adapter with the L6565 quasi-resonant PWM controller 7.0 301 KB
AN1326 AN1326: L6565 quasi-resonant controller 7.3 543 KB
AN1729 AN1729: L6565-based low cost SMPS for TV with less then 1W standby consumption 1.2 197 KB
AN1657 AN1657: SMPS for CRT monitors with the L6565 1.3 161 KB
AN2487 AN2487: STEVAL-TSP001V1 power over Ethernet powered device demonstration board 2.1 862 KB
AN2528 AN2528: Very wide input voltage range 6 W SMPS for metering 1.3 855 KB

Presentations & Training Material

Presentations
Description Version Size
Primary side regulation controllers portfolio 1 MB

Publications and Collaterals

Brochures
Description Version Size
Brochure Power management guide 05.2016 4 MB

Tools and Software

Evaluation Tools
Solution Evaluation Tools
Support & Community



Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L6565D SO-8 Tube Active - - NEC EAR99 MOROCCO MORE INFO DISTRIBUTOR AVAILABILITY
E-L6565N DIP-8 Tube NRND - - NEC EAR99 - MORE INFO
L6565N DIP-8 Tube Active - - NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
L6565DTR SO-8 Tape And Reel Active - - NEC EAR99 MOROCCO MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6565D ActiveSO-8IndustrialEcopack2 (**) 0 0
E-L6565N NRNDDIP-8IndustrialEcopack1
L6565N ActiveDIP-8IndustrialEcopack2 (**)
L6565DTR ActiveSO-8IndustrialEcopack2 (**) 0 0
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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