L6668

Active

Smart primary controller

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  • L6668 is a current-mode primary controller IC, designed to build single-ended converters.

    The IC drives the system at fixed frequency at heavy load and an improved Standby function causes a smooth frequency reduction as the load is progressively reduced. At very light load the device enters a special operating mode (burst-mode with fixed, externally programmed peak current) that, in addition to the on-board high-voltage start-up and the very low quiescent current, helps keep low the consumption from the mains and be compliant with energy saving regulations. To allow meeting compliance with these standards in power-factor-corrected systems too, an interface with the PFC controller is provided that enables to turn off the pre-regulator when the load level falls below a threshold.
    The IC includes also a programmable soft-start, slope compensation for stable operation at duty cycles greater then 50%, a disable function, a leading edge blanking on current sense to improve noise immunity, latched disable for OVP or OTP shutdown and an effective two-level OCP able to protect the system even in case the secondary diode fails short.

    Key Features

    • LATCHED DISABLE FOR OVP/OTP FUNCTION
    • DISABLE FUNCTION (ON/OFF CONTROL)
    • 2% PRECISION REFERENCE VOLTAGE EXTERNALLY AVAILABLE
    • PROGRAMMABLE SOFT-START
    • BLUE ANGEL, ENERGY STAR, EU CODE OF CONDUCT COMPLIANT
    • ±800 mA TOTEM POLE GATE DRIVER WITH INTERNAL CLAMP AND UVLO PULL-DOWN
    • SO16 PACKAGE ECOPACK®
    • PULSE-BY-PULSE & HICCUP-MODE OCP
    • SLOPE COMPENSATION
    • MULTIPOWER BCD TECHNOLOGY
    • ON-BOARD HIGH-VOLTAGE START-UP
    • LOAD-DEPENDENT CURRENT-MODE CONTROL: FIXED-FREQUENCY (HEAVY LOAD), FREQUENCY FOLDBACK (LIGHT LOAD), BURST-MODE (NO-LOAD)
    • LOW QUIESCENT CURRENT (< 2 mA)
    • INTERFACE WITH PFC CONTROLLER
    • IMPROVED STANDBY FUNCTION

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STMicroelectronics - L6668

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6668
Active
SO-16 Industrial Ecopack2
L6668TR
Active
SO-16 Industrial Ecopack2

L6668

Package:

SO-16

Material Declaration**:

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6668TR

Package:

SO-16

Material Declaration**:

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
L6668 Available at 1 distributors

Distributor availability ofL6668

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2021-01-21

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-21

Active
EAR99 NEC Tube SO-16 - - PHILIPPINES 0.8544 / 1k
L6668TR Available at 1 distributors

Distributor availability ofL6668TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 768 1 Order Now

Distributor reported inventory date: 2021-01-22

Distributor Name

MOUSER

Stock

768

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-22

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO-16 - - PHILIPPINES 0.8544 / 1k

L6668

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8544 / 1k

Distributor availability ofL6668

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2021-01-21

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-21

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.8544 / 1k

Country of Origin

PHILIPPINES

L6668TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8544 / 1k

Distributor availability ofL6668TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 768 1 Order Now

Distributor reported inventory date: 2021-01-22

Distributor Name

MOUSER

Stock

768

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-01-22

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.8544 / 1k

Country of Origin

PHILIPPINES

(*) 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