L6668_06 Datasheet, PDF (1/23 Pages) STMicroelectronics – SMART PRIMARY CONTROLLER

L6668
SMART PRIMARY CONTROLLER
1 General Features
■ MULTIPOWER BCD TECHNOLOGY
■ LOAD-DEPENDENT CURRENT-MODE CON-
TROL: FIXED-FREQUENCY (HEAVY LOAD),
FREQUENCY FOLDBACK (LIGHT LOAD),
BURST-MODE (NO-LOAD)
■ ON-BOARD HIGH-VOLTAGE START-UP
■ 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 FUNC-
TION
■ PROGRAMMABLE SOFT-START
■ 2% PRECISION REFERENCE VOLTAGE EX-
TERNALLY 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
Figure 1. Package
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
16
RCT
S-COMP
HV
15
1
SLOPE
COMP.
CLK
TIMING
VCC
5
25V
HV generator ON/OFF
and UVLO management
VREG
Vref
DIS
N.C.
+
7
-
2.2V
6
ISEN
12
HICCUP
+
-
1.5V
PFC_STOP
14
R
SQ
Vcc_OK
DIS
BLANKING
SQ
R
SQ
+
PWM
-
OCP
-
R
Vcc_OK
DIS
HYST. CTRL
VREG
+
0.4mA
-
+
DIS
2.2/2.7V
OCP
0.8V
9
11R
4R
SOFT-START
11
10
15V
STANDBY
8
VREF
4
OUT
3
GND
13
ST-BY
SKIPADJ
SS
COMP
January 2006
Rev. 4
1/23