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

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  • Key Features

    • 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

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L4981BD SO-20 Tube
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L4981BD013TR SO-20 Tape And Reel
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1.125 10000 EAR99 MALAYSIA Check Availability

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L4981AD SO-20 Tube
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0.984 10000 EAR99 MALAYSIA Check Availability

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DIGIKEY WORLDWIDE 868 1 Order Now
RS COMPONENTS EUROPE 1179 1 Order Now
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MOUSER WORLDWIDE 206 1 Order Now
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L4981AD013TR SO-20 Tape And Reel
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0.984 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofL4981AD013TR

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DIGIKEY WORLDWIDE 875 1 Order Now
AVNET AMERICA 2000 0 Order Now
FUTURE WORLDWIDE 2000 1000 Order Now
ARROW AMERICA 262 1 Order Now
MOUSER WORLDWIDE 2395 1 Order Now
Farnell Element14 EUROPE 1267 1 Order Now
RUTRONIK EUROPE 1000 1000 Order Now

Distributor reported inventory date: 2019-07-19

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875

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Stock

2000

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0

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AMERICA Order Now

FUTURE

Stock

2000

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1000

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ARROW

Stock

262

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1

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MOUSER

Stock

2395

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1

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WORLDWIDE Order Now

Farnell Element14

Stock

1267

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1

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RUTRONIK

Stock

1000

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1000

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EUROPE Order Now

Distributor reported inventory date: 2019-07-19

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L4981BD

Package

SO-20

Packing Type

Tube

Unit Price (US$)

1.125*

Distributor availability ofL4981BD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 729 1 Order Now
RS COMPONENTS EUROPE 155 1 Order Now
ARROW EUROPE 200 0 Order Now
ARROW AMERICA 103 1000 Order Now
MOUSER WORLDWIDE 489 1 Order Now
Farnell Element14 EUROPE 166 1 Order Now
RUTRONIK EUROPE 80 40 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

729

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

155

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

200

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

103

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

489

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

166

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

80

Min.Order

40

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

1.125

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4981BD013TR

Package

SO-20

Packing Type

Tape And Reel

Unit Price (US$)

1.125*

Distributor availability ofL4981BD013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 858 1 Order Now
ARROW EUROPE 10000 0 Order Now
MOUSER WORLDWIDE 4996 1 Order Now
Farnell Element14 EUROPE 25 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

858

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

10000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4996

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

25

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

1.125

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4981AD

Package

SO-20

Packing Type

Tube

Unit Price (US$)

0.984*

Distributor availability ofL4981AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 868 1 Order Now
RS COMPONENTS EUROPE 1179 1 Order Now
ARROW EUROPE 485 0 Order Now
Newark Element14 AMERICA 134 0 Order Now
ARROW AMERICA 178 1000 Order Now
MOUSER WORLDWIDE 206 1 Order Now
ANGLIA Live EUROPE 6640 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

868

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1179

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

485

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

134

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

178

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

206

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

6640

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

0.984

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4981AD013TR

Package

SO-20

Packing Type

Tape And Reel

Unit Price (US$)

0.984*

Distributor availability ofL4981AD013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 875 1 Order Now
AVNET AMERICA 2000 0 Order Now
FUTURE WORLDWIDE 2000 1000 Order Now
ARROW AMERICA 262 1 Order Now
MOUSER WORLDWIDE 2395 1 Order Now
Farnell Element14 EUROPE 1267 1 Order Now
RUTRONIK EUROPE 1000 1000 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

875

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

2000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

2000

Min.Order

1000

Region

WORLDWIDE Order Now

ARROW

Stock

262

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

2395

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1267

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

1000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

0.984

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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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      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

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Presentations & Training Material

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4981AD
Active
SO-20 Industrial Ecopack2 (**)
L4981AD013TR
Active
SO-20 Industrial Ecopack2 (**)
L4981BD
Active
SO-20 Industrial Ecopack2
L4981BD013TR
Active
SO-20 Industrial Ecopack2

L4981AD

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4981AD013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4981BD

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4981BD013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

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.