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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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STMicroelectronics - L5991

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Quality and Reliability

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L5991AD13TR Available at 1 distributors

Distributor availability ofL5991AD13TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3282 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

3282

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel SO-16 - - CHINA 0.924 / 1k
L5991D Available at 5 distributors

Distributor availability ofL5991D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1111 1 Order Now
RS COMPONENTS EUROPE 640 5 Order Now
Newark Element14 AMERICA 5 0 Order Now
MOUSER WORLDWIDE 963 1 Order Now
Farnell Element14 EUROPE 52 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

1111

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

640

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

5

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

963

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

52

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tube SO-16 - - CHINA 0.8916 / 1k
L5991AD Available at 4 distributors

Distributor availability ofL5991AD

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 35 0 Order Now
Newark Element14 AMERICA 2 0 Order Now
MOUSER WORLDWIDE 308 1 Order Now
Farnell Element14 EUROPE 376 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

ARROW

Stock

35

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

2

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

308

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

376

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tube SO-16 - - CHINA 0.924 / 1k
L5991D013TR Available at 5 distributors

Distributor availability ofL5991D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5000 1 Order Now
RS COMPONENTS EUROPE 485 1 Order Now
ARROW EUROPE 2500 0 Order Now
ARROW AMERICA 10000 2500 Order Now
MOUSER WORLDWIDE 1902 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

5000

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

485

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

10000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

1902

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

Buy Direct
Active
EAR99 NEC Tape And Reel SO-16 - - CHINA 0.9696 / 1k

L5991AD13TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.924 / 1k

Distributor availability ofL5991AD13TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3282 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

3282

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.924 / 1k

Country of Origin

CHINA

L5991D

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8916 / 1k

Distributor availability ofL5991D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1111 1 Order Now
RS COMPONENTS EUROPE 640 5 Order Now
Newark Element14 AMERICA 5 0 Order Now
MOUSER WORLDWIDE 963 1 Order Now
Farnell Element14 EUROPE 52 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

1111

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

640

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

5

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

963

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

52

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.8916 / 1k

Country of Origin

CHINA

L5991AD

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.924 / 1k

Distributor availability ofL5991AD

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 35 0 Order Now
Newark Element14 AMERICA 2 0 Order Now
MOUSER WORLDWIDE 308 1 Order Now
Farnell Element14 EUROPE 376 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

ARROW

Stock

35

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

2

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

308

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

376

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-01-20

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.924 / 1k

Country of Origin

CHINA

L5991D013TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.9696 / 1k

Distributor availability ofL5991D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5000 1 Order Now
RS COMPONENTS EUROPE 485 1 Order Now
ARROW EUROPE 2500 0 Order Now
ARROW AMERICA 10000 2500 Order Now
MOUSER WORLDWIDE 1902 1 Order Now

Distributor reported inventory date: 2021-01-20

Distributor Name

DIGIKEY

Stock

5000

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

485

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

10000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

1902

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-20

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.9696 / 1k

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