L6668

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 th...