
VERY
OVERVOLTAGEPROTECTION
MICROPOWERSTART-UPCURRENT(50
μ
ATYP.)
VERYLOW OPERATINGSUPPLYCURRENT
(4mA TYP.)
INTERNAL START-UP TIMER
CURRENT SENSE FILTER ON CHIP
DISABLEFUNCTION
1% PRECISION (@ T
j
= 25
°
C) INTERNAL
REFERENCE VOLTAGE
TRANSITION MODE OPERATION
TOTEM POLEOUTPUT CURRENT:
±
400mA
DIP8/SO8PACKAGES
PRECISE
ADJUSTABLE
OUTPUT
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
μ
A 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 followingbenefits:
- micro powerstart up current
- 1%precisioninternalreferencevoltage
(Tj= 25
°
C)
- Soft Output Over Voltage Protection
- noneedforexternallowpassfilteronthecurrent
sense
- verylowoperatingquiescentcurrentminimises
powerdissipation
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
V
REF2
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
V
CC
8
1
2
3
4
ZCD
V
CC
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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