VERY

PRECISE

ADJUSTABLE

OUTPUT

OVERVOLTAGE PROTECTION

MICROPOWERSTART-UPCURRENT (50

µATYP.)

VERY LOW OPERATING SUPPLY CURRENT

(4mA TYP.)

INTERNAL START-UP TIMER

CURRENT SENSE FILTER ON CHIP

DISABLE FUNCTION

°C) INTERNAL

REFERENCE VOLTAGE

TRANSITION MODE OPERATION

TOTEM POLE OUTPUT CURRENT:

±400mA

DIP8/SO8 PACKAGES

DESCRIPTION

L6561 is the improved version of the L6560

standard Power Factor Corrector. Fully compat-

ible with the standard version, it has a superior

performant multiplier making the device capable

of working in wide input voltage range applica-

tions (from 85V to 265V) with an excellent THD.

Furthermore the start up current has been re-

duced at few tens of

µA and a disable function

has been implemented on the ZCD pin, guaran-

teeing 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 current

sense

- verylow operating quiescent current minimises

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

transition mode and it is optimised for Electronic

Lamp Ballast application, AC-DC adaptors and

SMPS.

April 1999

®

+

-

MULTIPLIER

OVER-VOLTAGE

DETECTION

VOLTAGE

REGULATOR

UVLO

INTERNAL

SUPPLY 7V

+

-

2.5V

R1

R2

R

S

Q

+-

DRIVER

STARTER

+

-

ZERO CURRENT

DETECTOR

DISABLE

2.3V

1.8V

8

1

23

4

ZCD

INV

COMP

MULT

CS

GD

7

5

GND

6

D97IN547B

20V

40K

5pF

BLOCK DIAGRAM

Minidip

SO8

ORDERING NUMBERS:

L6561 (Minidip)

L6561D (SO8)

L6561

POWER FACTOR CORRECTOR

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