L5991

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Current Mode PWM

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  • This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control.

    Based on a standard current mode PWM controller this device includes some features such as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns leading edge blanking on current sense, pulse by pulse current limit, overcurrent protection with soft start intervention, and Standby function for oscillator frequency reduction when the converter is lightly loaded.

    Key Features

    • PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY
    • PROGRAMMABLE SOFT START
    • IN/OUT SYNCHRONIZATION
    • PWM UVLO WITH HYSTERESIS
    • INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE
    • LATCHED DISABLE
    • PACKAGE: DIP16 AND SO16
    • 100% AND 50% MAXIMUM DUTY CYCLE LIMIT
    • PROGRAMMABLE DUTY CYCLE
    • CURRENT-MODE CONTROL PWM
    • LOW START-UP CURRENT (< 120µA)
    • SWITCHING FREQUENCY UP TO 1MHz
    • FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION
    • STANDBY FUNCTION
    • HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A)

Circuit Diagram

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L5991AD13TR SO-16 Tape And Reel
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0.924 1000 EAR99 CHINA Check Availability

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DIGIKEY WORLDWIDE 1742 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

1742

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-12

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L5991D SO-16 Tube
Active
0.8916 1000 EAR99 CHINA Check Availability

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Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 207 1 Order Now
RS COMPONENTS EUROPE 830 5 Order Now
Newark Element14 AMERICA 6 0 Order Now
ARROW AMERICA 237 1000 Order Now
MOUSER WORLDWIDE 1543 1 Order Now
Farnell Element14 EUROPE 187 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

207

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

830

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

6

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

237

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

1543

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

187

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-12

Buy now
L5991AD SO-16 Tube
Active
0.924 1000 EAR99 CHINA Check Availability

Distributor availability ofL5991AD

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 60 0 Order Now
ARROW AMERICA 1 1000 Order Now
MOUSER WORLDWIDE 352 1 Order Now
Farnell Element14 EUROPE 452 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

ARROW

Stock

60

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

1

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

352

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

452

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-12

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L5991D013TR SO-16 Tape And Reel
Active
0.9696 1000 EAR99 CHINA Check Availability

Distributor availability ofL5991D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2500 1 Order Now
RS COMPONENTS EUROPE 495 1 Order Now
ARROW AMERICA 17500 2500 Order Now
MOUSER WORLDWIDE 870 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

495

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

17500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

870

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-12

Buy now

L5991AD13TR

Package

SO-16

Packing Type

Tape And Reel

Unit Price (US$)

0.924*

Distributor availability ofL5991AD13TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1742 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

1742

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-12

Marketing Status

Active

Unit Price (US$)

0.924

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L5991D

Package

SO-16

Packing Type

Tube

Unit Price (US$)

0.8916*

Distributor availability ofL5991D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 207 1 Order Now
RS COMPONENTS EUROPE 830 5 Order Now
Newark Element14 AMERICA 6 0 Order Now
ARROW AMERICA 237 1000 Order Now
MOUSER WORLDWIDE 1543 1 Order Now
Farnell Element14 EUROPE 187 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

207

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

830

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

6

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

237

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

1543

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

187

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-12

Marketing Status

Active

Unit Price (US$)

0.8916

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L5991AD

Package

SO-16

Packing Type

Tube

Unit Price (US$)

0.924*

Distributor availability ofL5991AD

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 60 0 Order Now
ARROW AMERICA 1 1000 Order Now
MOUSER WORLDWIDE 352 1 Order Now
Farnell Element14 EUROPE 452 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

ARROW

Stock

60

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

1

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

352

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

452

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-12

Marketing Status

Active

Unit Price (US$)

0.924

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L5991D013TR

Package

SO-16

Packing Type

Tape And Reel

Unit Price (US$)

0.9696*

Distributor availability ofL5991D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2500 1 Order Now
RS COMPONENTS EUROPE 495 1 Order Now
ARROW AMERICA 17500 2500 Order Now
MOUSER WORLDWIDE 870 1 Order Now

Distributor reported inventory date: 2019-12-12

Distributor Name

DIGIKEY

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

495

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

17500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

870

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-12

Marketing Status

Active

Unit Price (US$)

0.9696

Quantity

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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Technical Documentation

    • Description Version Size Action
      DS1231
      PRIMARY CONTROLLER WITH STANDBY
      16.1
      410.86 KB
      PDF
      DS1231

      PRIMARY CONTROLLER WITH STANDBY

    • Description Version Size Action
      AN1620
      25W off-line autoranging battery charger with L5991A
      1.2
      56.67 KB
      PDF
      AN2439
      27W Output power ultra wide range input flyback converter
      1.1
      410.59 KB
      PDF
      AN1621
      300W secondary controlled two-switch forward converter with L5991A
      2.2
      113.12 KB
      PDF
      AN1134
      45W AC-DC adapter with standby function
      4.1
      192.31 KB
      PDF
      AN1842
      60W WIDE-RANGE POWER SUPPLY FOR LCD MONITOR OR TV, USING THE L5991
      2.1
      815.92 KB
      PDF
      AN1132
      90W SMPS for monitors with standby function
      4.3
      190.36 KB
      PDF
      AN1537
      A simple trick enhances L5991’s standby function
      2.3
      300.55 KB
      PDF
      AN1686
      AN L5991-based converter with temporary extra power capability
      1.2
      90.63 KB
      PDF
      AN2623
      Evaluation board for off-line forward converter based on L5991
      1.2
      1.24 MB
      PDF
      AN2131
      HIGH POWER 3-PHASE AUXILIARY POWER SUPPLY DESIGN BASED ON L5991 AND ESBT STC08DE150
      1.1
      850.64 KB
      PDF
      AN1215
      How to handle short circuit conditions with ST's advanced PWM controllers
      1.1
      62.12 KB
      PDF
      AN1049
      Minimize power losses of lightly loaded flyback converters with the L5991 PWM controller
      6.2
      276.72 KB
      PDF
      AN1620

      25W off-line autoranging battery charger with L5991A

      AN2439

      27W Output power ultra wide range input flyback converter

      AN1621

      300W secondary controlled two-switch forward converter with L5991A

      AN1134

      45W AC-DC adapter with standby function

      AN1842

      60W WIDE-RANGE POWER SUPPLY FOR LCD MONITOR OR TV, USING THE L5991

      AN1132

      90W SMPS for monitors with standby function

      AN1537

      A simple trick enhances L5991’s standby function

      AN1686

      AN L5991-based converter with temporary extra power capability

      AN2623

      Evaluation board for off-line forward converter based on L5991

      AN2131

      HIGH POWER 3-PHASE AUXILIARY POWER SUPPLY DESIGN BASED ON L5991 AND ESBT STC08DE150

      AN1215

      How to handle short circuit conditions with ST's advanced PWM controllers

      AN1049

      Minimize power losses of lightly loaded flyback converters with the L5991 PWM controller

    • Description Version Size Action
      DT0118
      A Procedure for Restoring Bootloader Functionality to the STNRG388A
      1.0
      367.56 KB
      PDF
      DT0118

      A Procedure for Restoring Bootloader Functionality to the STNRG388A

Presentations & Training Material

    • Description Version Size Action
      Primary side regulation controllers portfolio
      1.1 MB
      PDF

      Primary side regulation controllers portfolio

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Power Management Guide 06.2019
      4.89 MB
      PDF

      Electric vehicle (EV) ecosystem

      Power Management Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L5991AD
Active
SO-16 Industrial Ecopack2 (**)
L5991AD13TR
Active
SO-16 Industrial Ecopack2 (**)
L5991D
Active
SO-16 Industrial Ecopack2 (**)
L5991D013TR
Active
SO-16 Industrial Ecopack2 (**)

L5991AD

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L5991AD13TR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L5991D

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L5991D013TR

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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