L4981

批量生产

L4981A: Fixed Frequency Average Current Mode; L4981B: Line Modulated Frequency Average Current Mode

下载数据手册

Sample and Buy from our eStore

样片和购买
概述
工具与软件
资源
解决方案
质量与可靠性
Sales Briefcase
eDesignSuite
Get Started
样片和购买
Partner products
  • The L4981 I.C. provides the necessary features to achieve a very high power factor up to 0.99.

    Realized in BCD 60II technology this power factor corrector (PFC) pre-regulator contains all the control functions for designing a high efficiency-mode power supply with sinusoidal line current consumption.
    The L4981 can be easily used in systems with mains voltages between 85V to 265V without anyline switch. This new PFC offers the possibility to work at fixed frequency (L4981A) or modulated frequency (L4981B) optimizing the size of the input filter; both the operating frequency modes working with an average current mode PWM controller, maintaining sinusoidal line current without slope compensation.
    Besides power MOSFET gate driver, precise voltage reference (externally available), error amplifier, under voltage lockout, current sense and the soft start are included. To limit the number of the external components, the device integrates protections as overvoltage and overcurrent. The overcurrent level can be programmed using simple resistor for L4981A. For a better precision and for L4981B an external divider must be used.

    主要特性

    • PRECISE 2% ON CHIP REFERENCE EXTERNALLY AVAILABLE
    • OVERVOLTAGE, OVERCURRENT PROTECTION
    • SOFT START
    • LOW START-UP CURRENT (0.3mA TYP.)
    • HIGH CURRENT BIPOLAR AND DMOS TOTEM POLE OUTPUT
    • CONTROL BOOST PWM UP TO 0.99P.F.
    • UNIVERSAL INPUT MAINS
    • LIMIT LINE CURRENT DISTORTION TO < 5%
    • AVERAGE CURRENT MODE PWM FOR MINIMUM NOISE SENSITIVITY
    • UNDER VOLTAGE LOCKOUT WITH HYSTERESIS AND PROGRAMMABLE TURN ON THRESHOLD
    • FEED FORWARD LINE AND LOAD REGULATION

电路原理图

下载 下载

样片和购买

产品型号
封装
包装类型
供货状态
预算价格(US$)
数量
ECCN (US)
Country of Origin
从分销商订购
从ST订购
L4981BD SO-20 Tube
批量生产
1.125 1000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4981BD

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 124 1 Order Now
RS COMPONENTS EUROPE 117 1 Order Now
ARROW EUROPE 162 0 Order Now
ARROW AMERICA 103 1000 Order Now
MOUSER WORLDWIDE 274 1 Order Now
Farnell Element14 EUROPE 161 1 Order Now
RUTRONIK EUROPE 80 40 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

124

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

117

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

162

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

103

Min.Order

1000

地区

AMERICA Order Now

MOUSER

库存

274

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

161

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

80

Min.Order

40

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

立即购买
L4981BD013TR SO-20 Tape And Reel
批量生产
1.125 1000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4981BD013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 796 1 Order Now
ARROW EUROPE 2000 0 Order Now
Newark Element14 AMERICA 6 0 Order Now
MOUSER WORLDWIDE 4943 1 Order Now
Farnell Element14 EUROPE 654 1 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

796

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

2000

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

6

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

4943

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

654

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

获取样片
L4981AD SO-20 Tube
批量生产
0.984 1000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4981AD

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 569 1 Order Now
RS COMPONENTS EUROPE 674 1 Order Now
ARROW EUROPE 204 0 Order Now
Newark Element14 AMERICA 66 0 Order Now
ARROW AMERICA 165 1000 Order Now
MOUSER WORLDWIDE 421 1 Order Now
ANGLIA Live EUROPE 3355 1 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

569

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

674

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

204

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

66

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

165

Min.Order

1000

地区

AMERICA Order Now

MOUSER

库存

421

Min.Order

1

地区

WORLDWIDE Order Now

ANGLIA Live

库存

3355

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

立即购买
L4981AD013TR SO-20 Tape And Reel
批量生产
0.984 1000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4981AD013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1830 1 Order Now
COMPEL EUROPE 4079 1 Order Now
AVNET AMERICA 1000 0 Order Now
FUTURE WORLDWIDE 1000 1000 Order Now
ARROW EUROPE 1000 0 Order Now
ARROW AMERICA 260 1 Order Now
MOUSER WORLDWIDE 2109 1 Order Now
Farnell Element14 EUROPE 1113 1 Order Now
RUTRONIK EUROPE 8000 1000 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

1830

Min.Order

1

地区

WORLDWIDE Order Now

COMPEL

库存

4079

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

1000

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

1000

Min.Order

1000

地区

WORLDWIDE Order Now

ARROW

库存

1000

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

260

Min.Order

1

地区

AMERICA Order Now

MOUSER

库存

2109

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1113

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

8000

Min.Order

1000

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

获取样片

L4981BD

封装

SO-20

包装类型

Tube

单价(US$)

1.125*

Distributor availability ofL4981BD

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 124 1 Order Now
RS COMPONENTS EUROPE 117 1 Order Now
ARROW EUROPE 162 0 Order Now
ARROW AMERICA 103 1000 Order Now
MOUSER WORLDWIDE 274 1 Order Now
Farnell Element14 EUROPE 161 1 Order Now
RUTRONIK EUROPE 80 40 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

124

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

117

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

162

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

103

Min.Order

1000

地区

AMERICA Order Now

MOUSER

库存

274

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

161

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

80

Min.Order

40

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

供货状态

批量生产

单价(US$)

1.125

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4981BD013TR

封装

SO-20

包装类型

Tape And Reel

单价(US$)

1.125*

Distributor availability ofL4981BD013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 796 1 Order Now
ARROW EUROPE 2000 0 Order Now
Newark Element14 AMERICA 6 0 Order Now
MOUSER WORLDWIDE 4943 1 Order Now
Farnell Element14 EUROPE 654 1 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

796

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

2000

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

6

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

4943

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

654

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

供货状态

批量生产

单价(US$)

1.125

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4981AD

封装

SO-20

包装类型

Tube

单价(US$)

0.984*

Distributor availability ofL4981AD

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 569 1 Order Now
RS COMPONENTS EUROPE 674 1 Order Now
ARROW EUROPE 204 0 Order Now
Newark Element14 AMERICA 66 0 Order Now
ARROW AMERICA 165 1000 Order Now
MOUSER WORLDWIDE 421 1 Order Now
ANGLIA Live EUROPE 3355 1 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

569

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

674

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

204

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

66

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

165

Min.Order

1000

地区

AMERICA Order Now

MOUSER

库存

421

Min.Order

1

地区

WORLDWIDE Order Now

ANGLIA Live

库存

3355

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

供货状态

批量生产

单价(US$)

0.984

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4981AD013TR

封装

SO-20

包装类型

Tape And Reel

单价(US$)

0.984*

Distributor availability ofL4981AD013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1830 1 Order Now
COMPEL EUROPE 4079 1 Order Now
AVNET AMERICA 1000 0 Order Now
FUTURE WORLDWIDE 1000 1000 Order Now
ARROW EUROPE 1000 0 Order Now
ARROW AMERICA 260 1 Order Now
MOUSER WORLDWIDE 2109 1 Order Now
Farnell Element14 EUROPE 1113 1 Order Now
RUTRONIK EUROPE 8000 1000 Order Now

代理商库存报告日期: 2020-01-26

代理商名称

DIGIKEY

库存

1830

Min.Order

1

地区

WORLDWIDE Order Now

COMPEL

库存

4079

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

1000

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

1000

Min.Order

1000

地区

WORLDWIDE Order Now

ARROW

库存

1000

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

260

Min.Order

1

地区

AMERICA Order Now

MOUSER

库存

2109

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1113

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

8000

Min.Order

1000

地区

EUROPE Order Now

代理商库存报告日期: 2020-01-26

供货状态

批量生产

单价(US$)

0.984

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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

适合您的资源

Related Applications

电源和变换器

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS0071
      Power factor corrector
      6.2
      2.56 MB
      PDF
      DS0071

      Power factor corrector

    • 描述 版本 文档大小 操作
      AN828
      1500W - 440V power factor corrector preregulator
      3.3
      34.98 KB
      PDF
      AN1606
      A "bridgeless PFC configuration" based on L4981 PFC controller
      3.2
      283.18 KB
      PDF
      AN827
      A 500W high power factor with the L4981A continuous mode IC
      1.2
      242.86 KB
      PDF
      AN2649
      A power factor corrector with MDmesh™ II and SiC diode
      2.0
      759.83 KB
      PDF
      AN510
      Circuits for power factor correction with regards to mains filtering
      1.3
      418.24 KB
      PDF
      AN628
      Designing a high power factor switching preregulator with the L4981 continuous mode
      9.4
      778.91 KB
      PDF
      AN833
      FREQUENCY MODULATION ON L4981B
      1.1
      27.86 KB
      PDF
      AN832
      L4981A synchronization
      1.2
      28.56 KB
      PDF
      AN829
      Semiconductor kit for power factor corrector
      3.3
      96.57 KB
      PDF
      AN828

      1500W - 440V power factor corrector preregulator

      AN1606

      A "bridgeless PFC configuration" based on L4981 PFC controller

      AN827

      A 500W high power factor with the L4981A continuous mode IC

      AN2649

      A power factor corrector with MDmesh™ II and SiC diode

      AN510

      Circuits for power factor correction with regards to mains filtering

      AN628

      Designing a high power factor switching preregulator with the L4981 continuous mode

      AN833

      FREQUENCY MODULATION ON L4981B

      AN832

      L4981A synchronization

      AN829

      Semiconductor kit for power factor corrector

Presentations & Training Material

    • 描述 版本 文档大小 操作
      Power Factor Corrector controllers portfolio
      1.22 MB
      PDF

      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
      4.89 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**
L4981AD
批量生产
SO-20 Industrial Ecopack2 (**)
L4981AD013TR
批量生产
SO-20 Industrial Ecopack2 (**)
L4981BD
批量生产
SO-20 Industrial Ecopack2
L4981BD013TR
批量生产
SO-20 Industrial Ecopack2

L4981AD

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4981AD013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4981BD

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4981BD013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

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

支持中心或提供反馈