Multi-mode controller for SMPS

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  • The L6566BH is an extremely versatile current-mode primary controller IC, specifically designed for high-performance offline flyback converters running off rectified 3-phase input lines. It is also suited to single-stage, single-switch, input-current-shaping converters (single-stage PFC) for applications that must comply with EN61000-3-2 or JEITA-MITI regulations.

    Both fixed-frequency (FF) and quasi-resonant (QR) operation are supported. The user can choose either of the two depending on application needs. The device features an externally programmable oscillator: it defines the converter switching frequency in FF mode and the maximum allowed switching frequency in QR mode.
    When FF operation is selected, the ICs work as a standard current-mode controller with a maximum duty cycle limited to 70% min. The oscillator frequency can be modulated to mitigate EMI emissions.
    QR operation, when selected, occurs at heavy load and is achieved through a transformer demagnetization sensing input that triggers MOSFET turn-on. Under some conditions, ZVS (zero-voltage switching) can be achieved. The converter’s power capability rise with the mains voltage is compensated by line voltage feedforward. At medium and light load, as the QR operating frequency equals the oscillator frequency, a function (valley skipping) is activated to prevent further frequency rise and keep the operation as close to ZVS as possible.
    With either FF or QR operation, at very light load the ICs enter a controlled burst-mode operation that, along with the built-in, non-dissipative, high-voltage startup circuit and the low quiescent current, helps keep the consumption from the mains low and meet energy saving recommendations.
    An innovative adaptive UVLO helps minimize the issues related to the fluctuations of the self-supply voltage due to transformer parasites.
    The protection functions included in this device are: not-latched input undervoltage (brownout), output OVP (auto-restart or latch-mode selectable), a first-level OCP with delayed shutdown to protect the system during overload or short-circuit conditions (auto-restart or latch-mode selectable), and a second-level OCP that is invoked when the transformer saturates or there is a short-circuit of the secondary diode. A latched disable input allows easy implementation of OTP with an external NTC, while an internal shutdown prevents IC overheating.
    Programmable soft-start, leading-edge blanking on the current sense input for greater noise immunity, slope compensation (in FF mode only), and a shutdown function for externally controlled burst-mode operation or remote ON/OFF control complete the features of this device.

    Key Features

    • Selectable multimode operation: fixed frequency or quasi-resonant
    • On-board 840 V high voltage startup
    • Advanced light load management
    • Low quiescent current (< 3 mA)
    • Adaptive UVLO
    • Line feedforward for constant power capability vs. mains voltage
    • Pulse-by-pulse OCP, shutdown on overload (latched or auto-restart)
    • Transformer saturation detection
    • Programmable frequency modulation for EMI reduction
    • Latched or auto-restart OVP
    • Brownout protection
    • -600/+800 mA totem pole gate driver with active pull-down during UVLO
    • SO16N package

Circuit Diagram

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L6566BH SO-16 Tube
Active
- EAR99 CHINA Check Availability

Distributor availability ofL6566BH

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1447 1 Order Now
RS COMPONENTS EUROPE 850 1 Order Now
ARROW EUROPE 650 0 Order Now
ARROW AMERICA 588 1000 Order Now
MOUSER WORLDWIDE 1038 1 Order Now
RUTRONIK EUROPE 3000 50 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

1447

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

850

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

650

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

588

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

1038

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

3000

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-20

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L6566BHTR SO-16 Tape And Reel
Active
- - EAR99 CHINA Check Availability

Distributor availability ofL6566BHTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2477 1 Order Now
Newark Element14 AMERICA 625 0 Order Now
MOUSER WORLDWIDE 3785 1 Order Now
Farnell Element14 EUROPE 1517 1 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

2477

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

625

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3785

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1517

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-20

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L6566BH

Package

SO-16

Packing Type

Tube

Unit Price (US$)

*

Distributor availability ofL6566BH

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1447 1 Order Now
RS COMPONENTS EUROPE 850 1 Order Now
ARROW EUROPE 650 0 Order Now
ARROW AMERICA 588 1000 Order Now
MOUSER WORLDWIDE 1038 1 Order Now
RUTRONIK EUROPE 3000 50 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

1447

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

850

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

650

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

588

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

1038

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

3000

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-20

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

CHINA

L6566BHTR

Package

SO-16

Packing Type

Tape And Reel

Unit Price (US$)

*

Distributor availability ofL6566BHTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2477 1 Order Now
Newark Element14 AMERICA 625 0 Order Now
MOUSER WORLDWIDE 3785 1 Order Now
Farnell Element14 EUROPE 1517 1 Order Now

Distributor reported inventory date: 2019-05-20

Distributor Name

DIGIKEY

Stock

2477

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

625

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

3785

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1517

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-05-20

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

CHINA

(*) 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

Evaluation Tools

    • Part Number

      40 W wide input range flyback converter using L6566BH Multimode controller for SMPS

      19 V - 65 W quasi resonant flyback adapter board

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS6580
      Multimode controller for SMPS
      2.0
      1.23 MB
      PDF
      DS6580

      Multimode controller for SMPS

    • 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
      fll6566bh0510 1.0
      3 MB
      PDF

      fll6566bh0510

    • Description Version Size Action
      Brochure Power management guide 10.2018
      4.42 MB
      PDF
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Brochure Power management guide

      Electric vehicle (EV) ecosystem

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6566BH
Active
SO-16 Industrial Ecopack2
L6566BHTR
Active
SO-16 Industrial Ecopack2

L6566BH

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6566BHTR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

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.

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Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

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