L6566B

批量生产
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SMPS多模控制器

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产品概述

描述

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.

  • 所有功能

    • 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)

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EDA符号、封装和3D模型

STMicroelectronics - L6566B

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质量与可靠性

产品型号 Marketing Status 封装 等级规格 符合RoHS级别 材料声明**
L6566B
批量生产
SO-16 工业 Ecopack2
L6566BTR
批量生产
SO-16 工业 Ecopack2

L6566B

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6566BTR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

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产品型号
Order from distributors
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供货状态
ECCN (US)
ECCN (EU)
包装类型
封装
温度(ºC) Country of Origin
Budgetary Price (US$)*/Qty
最小值
最大值
L6566B Available at distributors

经销商的可用性 L6566B

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tube SO-16 - - PHILIPPINES
L6566BTR Available at distributors

经销商的可用性 L6566BTR

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tape and Reel SO-16 - - PHILIPPINES

L6566B 批量生产

封装:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L6566B

ECCN (EU):

NEC

包装类型:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

L6566BTR 批量生产

封装:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L6566BTR

ECCN (EU):

NEC

包装类型:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

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(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商