L6668TR datasheet(1/23 Pages) STMICROELECTRONICS

Part #	L6668TR

Description	SMART PRIMARY CONTROLLER

PDF	23 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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L6668

May 2005

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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

■ SO16 PACKAGE ECOPACK

®

1.1 APPLICATIONS

■ HI-END AC-DC ADAPTERS/CHARGERS FOR

NOTEBOOKS.

■ LCD/CRT MONITORS, LCD/CRT TV

■ DIGITAL CONSUMER

Figure 2. Block Diagram

16

Vref

+

-

1.5V

12

BLANKING

R

SQ

25V

Vcc_OK

DIS

0.8V

4R

11R

DIS

11

10

3

4

8

5

15

15V

CLK

COMP

SS

ISEN

RCT

S-COMP

VCC

VREF

GND

OUT

HICCUP

13

SLOPE

COMP.

VREG

0.4mA

TIMING

PWM

+

-

1

HV

ST-BY

HV generator ON/OFF

and UVLO management

Vcc_OK

14

PFC_STOP

2.2/2.7V

-

+

OCP

DIS

OCP

-

+

9

SKIPADJ

SOFT-START

HYST. CTRL

SQ

R

SQ

R

STANDBY

2.2V

7

DIS

-

+

6

N.C.

16

Vref

+

-

1.5V

12

BLANKING

R

SQ

25V

Vcc_OK

DIS

0.8V

4R

11R

DIS

11

10

3

4

8

5

15

15V

CLK

COMP

SS

ISEN

RCT

S-COMP

VCC

VREF

GND

OUT

HICCUP

13

SLOPE

COMP.

VREG

0.4mA

TIMING

PWM

+

-

1

HV

ST-BY

HV generator ON/OFF

and UVLO management

Vcc_OK

14

PFC_STOP

2.2/2.7V

-

+

OCP

DIS

OCP

-

+

9

SKIPADJ

SOFT-START

HYST. CTRL

SQ

R

SQ

R

STANDBY

2.2V

7

DIS

-

+

6

N.C.

PRELIMINARY DATA

SMART PRIMARY CONTROLLER

Rev. 1

Figure 1. Package

Table 1. Order Codes

Part Number

Package

L6668

SO-16

L6668TR

SO-16 in Tape & Reel

SO-16 (Narrow)

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