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L6561

June 2004

1

FEATURES

■

VERY PRECISE ADJUSTABLE OUTPUT

OVERVOLTAGE PROTECTION

■

MICRO POWER START-UP CURRENT (50

µA

TYP.)

■

VERY LOW OPERATING SUPPLY

CURRENT(4mA TYP.)

■

INTERNAL START-UP TIMER

■

CURRENT SENSE FILTER ON CHIP

■

DISABLE FUNCTION

■

REFERENCE VOLTAGE

■

TRANSITION MODE OPERATION

■

TOTEM POLE OUTPUT CURRENT: ±400mA

■

DIP-8/SO-8 PACKAGES

2

DESCRIPTION

L6561 is the improved version of the L6560 stan-

dard Power Factor Corrector. Fully compatible

with the standard version, it has a superior perfor-

mant multiplier making the device capable of work-

ing in wide input voltage range applications (from

85V to 265V) with an excellent THD. Furthermore

the start up current has been reduced at few tens

of mA and a disable function has been implement-

ed on the ZCD pin, guaranteeing lower current

consumption in stand by mode.

Realised in mixed BCD technology, the chip gives

the following benefits:

– micro power start up current

– 1% precision internal reference voltage

– (Tj = 25°C)

– Soft Output Over Voltage Protection

– no need for external low pass filter on the cur-

rent sense

– very low operating quiescent current minimis-

es power dissipation

The totem pole output stage is capable of driving

a Power MOS or IGBT with source and sink cur-

rents of ±400mA. The device is operating in tran-

sition mode and it is optimised for Electronic Lamp

Ballast application, AC-DC adaptors and SMPS.

POWER FACTOR CORRECTOR

Figure 2. Block Diagram

MULTIPLIER

OVER-VOLTAGE

DETECTION

VOLTAGE

REGULATOR

UVLO

INTERNAL

SUPPLY 7V

+

-

2.5V

R1

R2

R

S

Q

+

-

DRIVER

STARTER

+

-

ZERO CURRENT

DETECTOR

DISABLE

2.1V

1.6V

8

1

23

4

ZCD

INV

COMP

MULT

CS

GD

7

5

GND

6

D97IN547E

20V

40K

5pF

REV. 16

Figure 1. Packages

Table 1. Order Codes

Part Number

Package

L6561

DIP-8

L6561D

SO-8

L6561D013TR

Tape & Reel

DIP-8

SO-8