Multi-mode controller for SMPS

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  • The L6566B is an extremely versatile current-mode primary controller ICs, specifically designed for high-performance offline flyback converters. It is also suited for single-stage single-switch input-current-shaping converters (single-stage PFC) for applications supposed to comply with EN61000-3-2 or JEITA-MITI regulations.

    Both fixed-frequency (FF) and quasi-resonant (QR) operation are supported. The user can pick either of the two depending on application needs. The device features an externally programmable oscillator: it defines converter’s switching frequency in FF mode and the maximum allowed switching frequency in QR mode.
    When FF operation is selected, the ICs work like a standard current-mode controller with a maximum duty cycle limited at 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’s turn-on. Under some conditions, ZVS (zero-voltage switching) can be achieved. 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 start-up circuit and the low quiescent current, helps keep low the consumption from the mains 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’s 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 (autorestart or latch-mode selectable) and a second-level OCP that 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 complete the equipment of this device.

    主要特性

    • Latched or autorestart OVP
    • Programmable frequency modulation for EMI reduction
    • -600/+800 mA totem pole gate driver with active pull-down during UVLO
    • Brownout protection
    • SO16N package
    • Pulse-by-pulse OCP, shutdown on overload (latched or autorestart)
    • Line feedforward for constant power capability vs. mains voltage
    • Selectable multi-mode operation: fixed frequency or quasi-resonant
    • Advanced light load management
    • On-board 700 V high-voltage start-up
    • Adaptive UVLO
    • Transformer saturation detection
    • Low quiescent current (< 3 mA)

电路原理图

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L6566B SO-16 Tube
Active
0.6816 1000 EAR99 CHINA 查看供货情况

Distributor availability ofL6566B

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地区 库存 最小订购量 Third party link
RS COMPONENTS EUROPE 865 5 Order Now
ARROW EUROPE 1478 0 Order Now
P&S ASIA/PACIFIC 200 1 Order Now
MOUSER WORLDWIDE 1898 1 Order Now
Farnell Element14 EUROPE 567 1 Order Now

代理商库存报告日期: 2019-08-22

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RS COMPONENTS

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1478

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200

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1898

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Farnell Element14

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567

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代理商库存报告日期: 2019-08-22

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L6566BTR SO-16 Tape And Reel
Active
0.6816 1000 EAR99 CHINA 查看供货情况

Distributor availability ofL6566BTR

代理商名称
地区 库存 最小订购量 Third party link
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 7500 0 Order Now
Newark Element14 AMERICA 625 0 Order Now
ARROW AMERICA 198 1 Order Now
MOUSER WORLDWIDE 7393 1 Order Now
Farnell Element14 EUROPE 1103 1 Order Now

代理商库存报告日期: 2019-08-22

代理商名称

FUTURE

库存

2500

Min.Order

2500

地区

WORLDWIDE Order Now

ARROW

库存

7500

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

625

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

198

Min.Order

1

地区

AMERICA Order Now

MOUSER

库存

7393

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1103

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1

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EUROPE Order Now

代理商库存报告日期: 2019-08-22

Get sample

L6566B

封装

SO-16

包装类型

Tube

Unit Price (US$)

0.6816*

Distributor availability ofL6566B

代理商名称
地区 库存 最小订购量 Third party link
RS COMPONENTS EUROPE 865 5 Order Now
ARROW EUROPE 1478 0 Order Now
P&S ASIA/PACIFIC 200 1 Order Now
MOUSER WORLDWIDE 1898 1 Order Now
Farnell Element14 EUROPE 567 1 Order Now

代理商库存报告日期: 2019-08-22

代理商名称

RS COMPONENTS

库存

865

Min.Order

5

地区

EUROPE Order Now

ARROW

库存

1478

Min.Order

0

地区

EUROPE Order Now

P&S

库存

200

Min.Order

1

地区

ASIA/PACIFIC Order Now

MOUSER

库存

1898

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

567

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-08-22

供货状态

Active

Unit Price (US$)

0.6816

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L6566BTR

封装

SO-16

包装类型

Tape And Reel

Unit Price (US$)

0.6816*

Distributor availability ofL6566BTR

代理商名称
地区 库存 最小订购量 Third party link
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 7500 0 Order Now
Newark Element14 AMERICA 625 0 Order Now
ARROW AMERICA 198 1 Order Now
MOUSER WORLDWIDE 7393 1 Order Now
Farnell Element14 EUROPE 1103 1 Order Now

代理商库存报告日期: 2019-08-22

代理商名称

FUTURE

库存

2500

Min.Order

2500

地区

WORLDWIDE Order Now

ARROW

库存

7500

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

625

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

198

Min.Order

1

地区

AMERICA Order Now

MOUSER

库存

7393

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1103

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-08-22

供货状态

Active

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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产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
L6566B
Active
SO-16 工业 Ecopack2
L6566BTR
Active
SO-16 工业 Ecopack2

L6566B

Package:

SO-16

Material Declaration**:

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6566BTR

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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