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L6668

STMicroelectronics
Part Number L6668
Manufacturer STMicroelectronics
Description SMART PRIMARY CONTROLLER
Published May 13, 2010
Detailed Description L6668 SMART PRIMARY CONTROLLER 1 ■ ■ General Features Figure 1. Package MULTIPOWER BCD TECHNOLOGY LOAD-DEPENDENT CURR...
Datasheet PDF File L6668 PDF File

L6668
L6668

Overview
L6668 SMART PRIMARY CONTROLLER 1 ■ ■ General Features Figure 1.
Package MULTIPOWER BCD TECHNOLOGY LOAD-DEPENDENT CURRENT-MODE CONTROL: FIXED-FREQUENCY (HEAVY LOAD), FREQUENCY FOLDBACK (LIGHT LOAD), BURST-MODE (NO-LOAD) ■ ON-BOARD HIGH-VOLTAGE START-UP www.
DataSheet4U.
com ■ IMPROVED STANDBY FUNCTION ■ LOW QUIESCENT CURRENT (< 2 mA) ■ SLOPE COMPENSATION ■ PULSE-BY-PULSE & HICCUP-MODE OCP ■ INTERFACE WITH PFC CONTROLLER ■ DISABLE FUNCTION (ON/OFF CONTROL) ■ LATCHED DISABLE FOR OVP/OTP FUNCTION ■ PROGRAMMABLE SOFT-START ■ 2% PRECISION REFERENCE VOLTAGE EXTERNALLY AVAILABLE ■ ±800 mA TOTEM POLE GATE DRIVER WITH INTERNAL CLAMP AND UVLO PULL-DOWN ■ BLUE ANGEL, ENERGY STAR, EU CODE OF CONDUCT COMPLIANT Figure 2.
Block Diagram S-COMP 15 1 HV SO-16 (Narrow) Table 1.
Order Codes Part Number L6668 L6668TR ■ Package SO-16 SO-16 in Tape & Reel SO16 PACKAGE ECOPACK® 1.
1 APPLICATIONS ■ ■ ■ HI-END AC-DC ADAPTERS/CHARGERS FOR NOTEBOOKS.
LCD/CRT MONITORS, LCD/CRT TV DIGITAL CONSUMER V CC 5 SLOPE COMP.
16 RCT CLK 25V HV generator ON/OFF and UVLO management Vcc_OK VREG Vref 8 VREF TIMING DIS + 7 2.
2V R S Q DIS 15V 4 OUT BLANKING + PWM OCP Q + S R Q N.
C.
6 12 ISEN 1.
5V HICCUP + - R S Vcc_OK DIS VREG 3 GND HYST.
CTRL 0.
4mA 13 STANDBY ST-BY PFC_STOP 14 DIS OCP + 2.
2/2.
7V 0.
8V 9 SKIPADJ SS 4R 11R SOFT-START 11 10 COMP January 2006 Rev.
4 1/23 L6668 2 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 sta...


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