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  • The L4984D is a current-mode PFC controller operating with line-modulated fixed-off-time (LM-FOT) control. A proprietary LM-FOT modulator allows fixed-frequency operation for boost PFC converters as long as they are operated in CCM (continuous conduction mode).

    The chip comes in a 10-pin SO package and offers a low-cost solution for CCM-operated boost PFC pre-regulators in EN61000-3-2 and JEIDA-MITI compliant applications, in a power range that spans from few hundred W to 1 KW and above.
    The highly linear multiplier includes a special circuit, able to reduce the crossover distortion of the AC input current, that allows wide-range-mains operation with a reasonably low THD, even over a large load range.
    The output voltage is controlled by means of a voltage-mode error amplifier and an accurate (1% at Tj = 25 °C) internal voltage reference. Loop stability is optimized by the voltage feedforward function (1/V2correction), which in this IC uses a proprietary technique that also significantly improves line transient response in the case of mains drops and surges (“bi-directional”).
    The device features low consumption and includes a disable function suitable for IC remote on/off. These features allow use in applications which also comply with the latest energy saving requirements (Blue Angel, ENERGY STAR, Energy 2000, etc.).
    In addition to overvoltage protection able to keep the output voltage under control during transient conditions, the IC is also provided with protection against feedback loop failures or erroneous settings. Other onboard protection functions allow that brownout conditions and boost inductor saturation can be safely handled. Soft-start limits peak current and extends off-time to prevent flux runaway in the initial cycles.
    The totem pole output stage, capable of 600 mA source and 800 mA sink current, is suitable for big MOSFETs or IGBT drive.

    主要特性

    • Line-modulated fixed-off-time (LM-FOT) control of CCM-operated PFC pre-regulators
    • Proprietary LM-FOT modulator for nearly fixed-frequency operation
    • Proprietary multiplier design for minimum THD of AC input current
    • Fast “bi-directional” input voltage feedforward (1/V2correction)
    • Accurate adjustable output overvoltage protection
    • Protection against feedback loop failure (latched shutdown)
    • Inductor saturation protection
    • AC brownout detection
    • Digital leading-edge blanking on current sense
    • Soft-start
    • 1% (at Tj = 25 °C) internal reference voltage
    • - 600 / + 800 mA totem pole gate driver with active pull-down during UVLO and voltage clamp
    • SSOP10 package

样片和购买

产品型号
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L4984DTR SSOP 10 Tape And Reel
Active
0.836 1000 EAR99 CHINA 查看供货情况

Distributor availability ofL4984DTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 5671 1 Order Now
ARROW EUROPE 10494 0 Order Now
MOUSER WORLDWIDE 8235 1 Order Now
Farnell Element14 EUROPE 2495 1 Order Now

代理商库存报告日期: 2019-09-22

代理商名称

DIGIKEY

库存

5671

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

10494

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

8235

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

2495

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-22

Get sample
L4984D SSOP 10 Tube
Active
0.836 1000 EAR99 MOROCCO 查看供货情况

Distributor availability ofL4984D

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1527 1 Order Now
ARROW EUROPE 790 0 Order Now
Newark Element14 AMERICA 500 0 Order Now
MOUSER WORLDWIDE 1868 1 Order Now
Farnell Element14 EUROPE 1340 1 Order Now

代理商库存报告日期: 2019-09-22

代理商名称

DIGIKEY

库存

1527

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

790

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

500

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1868

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1340

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-22

立即购买

L4984DTR

封装

SSOP 10

包装类型

Tape And Reel

单价(US$)

0.836*

Distributor availability ofL4984DTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 5671 1 Order Now
ARROW EUROPE 10494 0 Order Now
MOUSER WORLDWIDE 8235 1 Order Now
Farnell Element14 EUROPE 2495 1 Order Now

代理商库存报告日期: 2019-09-22

代理商名称

DIGIKEY

库存

5671

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

10494

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

8235

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

2495

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-22

供货状态

Active

单价(US$)

0.836

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L4984D

封装

SSOP 10

包装类型

Tube

单价(US$)

0.836*

Distributor availability ofL4984D

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1527 1 Order Now
ARROW EUROPE 790 0 Order Now
Newark Element14 AMERICA 500 0 Order Now
MOUSER WORLDWIDE 1868 1 Order Now
Farnell Element14 EUROPE 1340 1 Order Now

代理商库存报告日期: 2019-09-22

代理商名称

DIGIKEY

库存

1527

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

790

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

500

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1868

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1340

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-22

供货状态

Active

单价(US$)

0.836

数量

1000

ECCN (US)

EAR99

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

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    • 产品型号

      350 W CCM PFC pre-regulator demonstration board based on the L4984D

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS9596
      CCM PFC controller
      1.0
      4.99 MB
      PDF
      DS9596

      CCM PFC controller

    • 描述 版本 文档大小 操作
      AN4149
      Designing a CCM PFC pre-regulator based on the L4984D
      2.0
      2.7 MB
      PDF
      AN4163
      EVL4984-350W: 350 W CCM PFC pre-regulator with the L4984D
      2.0
      3.77 MB
      PDF
      AN4149

      Designing a CCM PFC pre-regulator based on the L4984D

      AN4163

      EVL4984-350W: 350 W CCM PFC pre-regulator with the L4984D

    • 描述 版本 文档大小 操作
      AN4163
      EVL4984-350W: 350 W CCM PFC pre-regulator with the L4984D
      2.0
      3.77 MB
      PDF
      AN4163

      EVL4984-350W: 350 W CCM PFC pre-regulator with the L4984D

演示和培训资料

    • 描述 版本 文档大小 操作
      EuP Lot 6 Tier2 Ecodesign requirements for Standby
      2.2 MB
      PDF
      L4984D CCM PFC Controller 1.0
      322.33 KB
      PDF
      Power Factor Corrector controllers portfolio
      1.22 MB
      PDF

      EuP Lot 6 Tier2 Ecodesign requirements for Standby

      L4984D CCM PFC Controller

      Power Factor Corrector controllers portfolio

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      Power Management Guide 06.2019
      5.5 MB
      PDF

      Power Management Guide

产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
L4984D
Active
SSOP 10 工业 Ecopack2
L4984DTR
Active
SSOP 10 工业 Ecopack2

L4984D

Package:

SSOP 10

Material Declaration**:

Marketing Status

Active

Package

SSOP 10

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4984DTR

Package:

SSOP 10

Material Declaration**:

Marketing Status

Active

Package

SSOP 10

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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