L6668

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Smart primary controller

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Product overview

Description

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.

  • All 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

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L6668 Available at distributors

Distributor availability of L6668

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No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tube SO-16 - - PHILIPPINES
L6668TR Available at distributors

Distributor availability of L6668TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SO-16 - - PHILIPPINES

L6668 Active

Package:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L6668

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

L6668TR Active

Package:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L6668TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

Distributor Name

Distributor reported inventory date:

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors