Multi-mode controller for SMPS with PFC front-end

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  • The L6566A is an extremely versatile current-mode primary controller IC specifically designed for high-performance offline flyback converters operated from front-end power factor correction (PFC) stages in applications in compliance 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's switching frequency in FF mode and the maximum allowed switching frequency in QR mode.
    When FF operation is selected, the IC works like a standard current-mode controller with a maximum duty cycle limited to 70% (min.).
    QR operation, when selected, occurs 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 input 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 IC enters a controlled burst-mode operation that, along with the built-in non-dissipative high-voltage startup circuit and a reduced quiescent current, helps keep the consumption from the mains low and meet energy saving recommendations.
    To allow the meeting of energy saving recommendations in two-stage power-factor-corrected systems as well, the L6566A provides an interface with the PFC controller that enables the re-regulator to be turned off at light load.
    An innovative adaptive UVLO helps minimize the issues related to fluctuations in 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 which is invoked when the transformer saturates or the secondary diode fails short. A latched disable input allows easy implementation of OTP with an external NTC, while an internal thermal 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 are all features of this device.

    Key Features

    • Selectable multi-mode operation: fixed frequency or quasi-resonant
    • Onboard 700 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
    • Switched supply rail for PFC controller
    • Latched or auto-restart OVP
    • Brownout protection
    • -600/+800 mA totem pole gate-driver with active pull-down during UVLO
    • SO16N package

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L6566ATR SO-16 Tape And Reel
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0.6816 1000 EAR99 CHINA 在庫チェック

Distributor availability ofL6566ATR

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代理店レポートによる在庫データ: 2019-11-17

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L6566A SO-16 Tube
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0.6816 1000 EAR99 CHINA 在庫チェック

Distributor availability ofL6566A

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 510 1 Order Now
RS COMPONENTS EUROPE 305 1 Order Now
ARROW AMERICA 1000 1000 Order Now
MOUSER WORLDWIDE 785 1 Order Now

代理店レポートによる在庫データ: 2019-11-17

代理店名

DIGIKEY

在庫

510

Min.Order

1

地域

WORLDWIDE Order Now

RS COMPONENTS

在庫

305

Min.Order

1

地域

EUROPE Order Now

ARROW

在庫

1000

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1000

地域

AMERICA Order Now

MOUSER

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785

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代理店レポートによる在庫データ: 2019-11-17

購入

L6566ATR

パッケージ

SO-16

梱包タイプ

Tape And Reel

Unit Price (US$)

0.6816*

Distributor availability ofL6566ATR

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 100 1 Order Now
ARROW AMERICA 5000 2500 Order Now
MOUSER WORLDWIDE 2500 1 Order Now

代理店レポートによる在庫データ: 2019-11-17

代理店名

DIGIKEY

在庫

100

Min.Order

1

地域

WORLDWIDE Order Now

ARROW

在庫

5000

Min.Order

2500

地域

AMERICA Order Now

MOUSER

在庫

2500

Min.Order

1

地域

WORLDWIDE Order Now

代理店レポートによる在庫データ: 2019-11-17

製品ステータス

アクティブ

Unit Price (US$)

0.6816

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L6566A

パッケージ

SO-16

梱包タイプ

Tube

Unit Price (US$)

0.6816*

Distributor availability ofL6566A

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 510 1 Order Now
RS COMPONENTS EUROPE 305 1 Order Now
ARROW AMERICA 1000 1000 Order Now
MOUSER WORLDWIDE 785 1 Order Now

代理店レポートによる在庫データ: 2019-11-17

代理店名

DIGIKEY

在庫

510

Min.Order

1

地域

WORLDWIDE Order Now

RS COMPONENTS

在庫

305

Min.Order

1

地域

EUROPE Order Now

ARROW

在庫

1000

Min.Order

1000

地域

AMERICA Order Now

MOUSER

在庫

785

Min.Order

1

地域

WORLDWIDE Order Now

代理店レポートによる在庫データ: 2019-11-17

製品ステータス

アクティブ

Unit Price (US$)

0.6816

数量

1000

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

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製品型番 製品ステータス パッケージ グレード RoHSコンプライアンスグレード Material Declaration**
L6566A
アクティブ
SO-16 インダストリアル Ecopack2
L6566ATR
アクティブ
SO-16 インダストリアル Ecopack2

L6566A

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

アクティブ

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6566ATR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

アクティブ

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.