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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
Sample & Buy
| Part Number | Package | Packing Type | Marketing Status | Budgetary Price (US$)* | Quantity | ECCN (US) | Country of Origin | Order from Distributors | Order from ST |
|---|---|---|---|---|---|---|---|---|---|
| L6668 | SO-16 | Tube | Active | 0.8544 | 1000 | EAR99 | CHINA | No availability of distributors reported, please contact our sales office | |
| L6668TR | SO-16 | Tape And Reel | Active | 0.8544 | 1000 | EAR99 | CHINA | No availability of distributors reported, please contact our sales office |
L6668
Package
SO-16Packing Type
TubeUnit Price (US$)
0.8544*L6668TR
Package
SO-16Packing Type
Tape And ReelUnit Price (US$)
0.8544*(*) 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
Featured Videos
| 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-16Material Declaration**:
L6668TR
Package:
SO-16Material Declaration**:
(**) 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.
