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  • The L6565 is a current-mode primary controller IC, specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters.

    Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET's turn-on.
    Converter's power capability variations with the mains voltage are compensated by line voltage feedforward. At light load the device features a special function that automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. In addition to very low start-up and quiescent currents, this feature helps keep low the consumption from the mains at light load and be Blue Angel and Energy Star compliant.
    The IC includes also a disable function, an on-chip filter on current sense, an error amplifier with a precise reference voltage for primary regulation and an effective two-level overcurrent protection.

    Key Features

    • TV/MONITOR SMPS
    • BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT
    • DIGITAL CONSUMER
    • AC-DC ADAPTERS/CHARGERS
    • PRINTERS, FAX MACHINES, PHOTOCOPIERS AND SCANNERS
    • 1% PRECISION (@ Tj = 25˚C) INTERNAL REFERENCE VOLTAGE
    • DISABLE FUNCTION (ON/OFF CONTROL)
    • QUASI-RESONANT (QR) ZERO-VOLTAGE-SWITCHING (ZVS) TOPOLOGY
    • FREQUENCY FOLDBACK FOR OPTIMUM STANDBY EFFICIENCY
    • LINE FEED FORWARD TO DELIVER CONSTANT POWER vs. MAINS CHANGE
    • ULTRA-LOW START-UP (< 70µA) AND QUIESCENT CURRENT (< 3.5mA)
    • ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN
    • PULSE-BY-PULSE & HICCUP-MODE OCP

Recommended for you

Related Applications

Power Supplies and Converters

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS2176
      Quasi-resonant SMPS controller
      5.3
      249.87 KB
      PDF
      DS2176

      Quasi-resonant SMPS controller

    • Description Version Size Action
      AN2936
      10 W SMPS with HV power MOSFET and the L6565 for three-phase industrial applications
      1.1
      301.41 KB
      PDF
      AN2844
      15 W wide range SMPS for metering based on ESBT™ STC03DE220HV and L6565 PWM controller
      1.1
      1.44 MB
      PDF
      AN5287
      170W high input voltage two switch flyback based on L6565 and 1500V K5 MOSFETs
      1.0
      2.8 MB
      PDF
      AN1376
      25W quasi-resonant flyback converter for set-top box application using the L6565
      2.2
      1.73 MB
      PDF
      AN1439
      30 W AC-DC adapter with the L6565 quasi-resonant PWM controller
      7.0
      301.08 KB
      PDF
      AN1326
      L6565 quasi-resonant controller
      7.3
      543.01 KB
      PDF
      AN2487
      STEVAL-TSP001V1 power over Ethernet powered device demonstration board
      2.1
      862.41 KB
      PDF
      AN2528
      Very wide input voltage range 6 W SMPS for metering
      1.3
      855.08 KB
      PDF
      AN2936

      10 W SMPS with HV power MOSFET and the L6565 for three-phase industrial applications

      AN2844

      15 W wide range SMPS for metering based on ESBT™ STC03DE220HV and L6565 PWM controller

      AN5287

      170W high input voltage two switch flyback based on L6565 and 1500V K5 MOSFETs

      AN1376

      25W quasi-resonant flyback converter for set-top box application using the L6565

      AN1439

      30 W AC-DC adapter with the L6565 quasi-resonant PWM controller

      AN1326

      L6565 quasi-resonant controller

      AN2487

      STEVAL-TSP001V1 power over Ethernet powered device demonstration board

      AN2528

      Very wide input voltage range 6 W SMPS for metering

    • Description Version Size Action
      DT0118
      A Procedure for Restoring Bootloader Functionality to the STNRG388A
      1.0
      367.56 KB
      PDF
      DT0118

      A Procedure for Restoring Bootloader Functionality to the STNRG388A

Presentations & Training Material

    • Description Version Size Action
      Primary side regulation controllers portfolio
      1.1 MB
      PDF

      Primary side regulation controllers portfolio

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Power Management Guide 07.2020
      7.12 MB
      PDF

      Electric vehicle (EV) ecosystem

      Power Management Guide

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6565D
Active
SO-8 Industrial Ecopack2 (**)
L6565DTR
Active
SO-8 Industrial Ecopack2 (**)
L6565N
Active
DIP-8 Industrial Ecopack2

L6565D

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L6565DTR

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L6565N

Package:

DIP-8

Material Declaration**:

Marketing Status

Active

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6565D Available at 6 distributors

Distributor availability ofL6565D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2041 1 Order Now
COMPEL EUROPE 2863 1 Order Now
RS COMPONENTS EUROPE 280 2 Order Now
ARROW EUROPE 888 0 Order Now
MOUSER WORLDWIDE 1909 1 Order Now
Farnell Element14 EUROPE 402 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

2041

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2863

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

280

Min.Order

2

Region

EUROPE Order Now

ARROW

Stock

888

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1909

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

402

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tube SO-8 - - MOROCCO 0.32 / 1k
L6565N Available at 5 distributors

Distributor availability ofL6565N

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1034 1 Order Now
ARROW EUROPE 10 0 Order Now
Newark Element14 AMERICA 42 0 Order Now
MOUSER WORLDWIDE 2300 1 Order Now
Farnell Element14 EUROPE 62 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

1034

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

10

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

42

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2300

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

62

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tube DIP-8 - - CHINA 0.32 / 1k
L6565DTR Available at 7 distributors

Distributor availability ofL6565DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10922 1 Order Now
RS COMPONENTS EUROPE 25 1 Order Now
AVNET AMERICA 2500 0 Order Now
Newark Element14 AMERICA 565 0 Order Now
MOUSER WORLDWIDE 4442 1 Order Now
Farnell Element14 EUROPE 84 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2020-08-04

Distributor Name

DIGIKEY

Stock

10922

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

25

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

565

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

4442

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

84

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-04

Buy now
Active
EAR99 NEC Tape And Reel SO-8 - - MOROCCO 0.32 / 1k

L6565D

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.32 / 1k

Distributor availability ofL6565D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2041 1 Order Now
COMPEL EUROPE 2863 1 Order Now
RS COMPONENTS EUROPE 280 2 Order Now
ARROW EUROPE 888 0 Order Now
MOUSER WORLDWIDE 1909 1 Order Now
Farnell Element14 EUROPE 402 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

2041

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2863

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

280

Min.Order

2

Region

EUROPE Order Now

ARROW

Stock

888

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1909

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

402

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.32 / 1k

Country of Origin

MOROCCO

L6565N

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.32 / 1k

Distributor availability ofL6565N

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1034 1 Order Now
ARROW EUROPE 10 0 Order Now
Newark Element14 AMERICA 42 0 Order Now
MOUSER WORLDWIDE 2300 1 Order Now
Farnell Element14 EUROPE 62 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

1034

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

10

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

42

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2300

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

62

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tube

Package

DIP-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.32 / 1k

Country of Origin

CHINA

L6565DTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.32 / 1k

Distributor availability ofL6565DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10922 1 Order Now
RS COMPONENTS EUROPE 25 1 Order Now
AVNET AMERICA 2500 0 Order Now
Newark Element14 AMERICA 565 0 Order Now
MOUSER WORLDWIDE 4442 1 Order Now
Farnell Element14 EUROPE 84 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

Distributor reported inventory date: 2020-08-04

Distributor Name

DIGIKEY

Stock

10922

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

25

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

2500

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

565

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

4442

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

84

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

5000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-04

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.32 / 1k

Country of Origin

MOROCCO

(*) 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