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STMicroelectronics
STMicroelectronics

L6561 Datasheet

POWER FACTOR CORRECTOR


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L6561
POWER FACTOR CORRECTOR
1 FEATURES
VERY PRECISE ADJUSTABLE OUTPUT
OVERVOLTAGE PROTECTION
MICRO POWER START-UP CURRENT (50µA
TYP.)
VERY LOW OPERATING SUPPLY
CURRENT(4mA TYP.)
INTERNAL START-UP TIMER
CURRENT SENSE FILTER ON CHIP
DISABLE FUNCTION
1% PRECISION (@ Tj = 25°C) INTERNAL
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.
Figure 1. Packages
DIP-8
Table 1. Order Codes
Part Number
L6561
L6561D
L6561D013TR
SO-8
Package
DIP-8
SO-8
Tape & Reel
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.
Figure 2. Block Diagram
1
INV
-
2.5V
+
COMP
2
MULT
3
MULTIPLIER
CS
4
40K
VOLTAGE
REGULATOR
OVER-VOLTAGE
DETECTION
-+
5pF
VCC
8
20V
R2
INTERNAL
SUPPLY 7V
R1
+
-
VREF2
2.1V
1.6V
UVLO
RQ
S
DRIVER
ZERO CURRENT
+ DETECTOR
-
STARTER
VCC
7
GD
June 2004
6
GND
5
ZCD
DISABLE
D97IN547E
REV. 16
1/13
Page 1

L6561
Table 2. Absolute Maximum Ratings
Symbol
IVcc
IGD
INV, COMP
MULT
CS
ZCD
Pin
8
7
1, 2, 3
Parameter
Iq + IZ; (IGD = 0)
Output Totem Pole Peak Current (2µs)
Analog Inputs & Outputs
4 Current Sense Input
5 Zero Current Detector
Ptot Power Dissipation @Tamb = 50 °C
Tj Junction Temperature Operating Range
Tstg Storage Temperature
Figure 3. Pin Connection (Top view)
(DIP-8)
(SO-8)
Value
30
±700
-0.3 to 7
-0.3 to 7
50 (source)
-10 (sink)
1
0.65
-40 to 150
-55 to 150
Unit
mA
mA
V
V
mA
mA
W
W
°C
°C
INV
COMP
MULT
CS
18
27
36
45
DIP8
VCC
GD
GND
ZCD
Table 3. Thermal Data
Symbol
Parameter
Rth j-amb Thermal Resistance Junction to ambient
SO 8
150
MINIDIP
100
Unit
°C/W
Table 4. Pin Description
N. Name
Function
1 INV Inverting input of the error amplifier. A resistive divider is connected between the output
regulated voltage and this point, to provide voltage feedback.
2 COMP Output of error amplifier. A feedback compensation network is placed between this pin and the
INV pin.
3 MULT Input of the multiplier stage. A resistive divider connects to this pin the rectified mains. A voltage
signal, proportional to the rectified mains, appears on this pin.
4 CS Input to the comparator of the control loop. The current is sensed by a resistor and the resulting
voltage is applied to this pin.
5 ZCD Zero current detection input. If it is connected to GND, the device is disabled.
6 GND Current return for driver and control circuits.
7 GD Gate driver output. A push pull output stage is able to drive the Power MOS with peak current of
400mA (source and sink).
8 VCC Supply voltage of driver and control circuits.
(1) Parameter guaranteed by design, not tested in production.
2/13
Page 2

L6561
Table 5. Electrical Characteristics
(VCC = 14.5V; Tamb = -25°C to 125°C;unless otherwise specified)
Symbol Pin
Parameter
Test Condition
SUPPLY VOLTAGE SECTION
VCC
VCC ON
VCC OFF
Hys
8 Operating Range
8 Turn-on Threshold
8 Turn-off Threshold
8 Hysteresis
after turn-on
SUPPLY CURRENT SECTION
ISTART-U
Iq
ICC
8 Start-up Current
8 Quiescent Current
8 Operating Supply Current
Iq 8 Quiescent Current
8
VZ 8 Zener Voltage
ERROR AMPLIFIER SECTION
before turn-on (VCC =11V)
CL = 1nF @ 70KHz
in OVP condition Vpin1 = 2.7V
VPIN5 150mV, VCC > VCC off
VPIN5 150mV, VCC < VCC off
ICC = 25mA
VINV
IINV
GV
GB
1 Voltage Feedback Input
Threshold
Line Regulation
1 Input Bias Current
Voltage Gain
Gain Bandwidth
Tamb = 25°C
12V < VCC < 18V
VCC = 12 to 18V
Open loop
ICOMP 2 Source Current
Sink Current
VCOMP 2 Upper Clamp Voltage
Lower Clamp Voltage
MULTIPLIER SECTION
VCOMP = 4V, VINV = 2.4V
VCOMP = 4V, VINV = 2.6V
ISOURCE = 0.5mA
ISink = 0.5mA
VMULT
------V----C----S---
V m u l t
3 Linear Operating Voltage
Output Max. Slope
VMULT = from 0V to 0.5V
VCOMP = Upper Clamp Voltage
K Gain
CURRENT SENSE COMPARATOR
VMULT = 1V VCOMP = 4V
VCS
ICS
td (H-L)
4 Current Sense Reference
Clamp
4 Input Bias Current
4 Delay to Output
4 Current Sense Offset
VMULT = 2.5V
VCOMP = Upper Clamp Voltage
VOS = 0
ZERO CURRENT DETECTOR
VZCD
5 Input Threshold Voltage Rising (1)
Edge
Hysteresis
(1)
VZCD
VZCD
5 Upper Clamp Voltage
5 Upper Clamp Voltage
IZCD = 20µA
IZCD = 3mA
Min.
11
11
8.7
2.2
20
20
18
2.465
2.44
60
-2
2.5
0 to 3
1.65
0.45
1.6
0.3
4.5
4.7
Typ.
12
9.5
2.5
50
2.6
4
1.4
1.4
50
20
2.5
2
-0.1
80
1
-4
4.5
5.8
2.25
0 to 3.5
1.9
0.6
1.7
-0.05
200
0
2.1
0.5
5.1
5.2
Max.
18
13
10.3
2.8
90
4
5.5
2.1
2.1
90
22
2.535
2.56
5
-1
-8
0.75
1.8
-1
450
15
0.7
5.9
6.1
Unit
V
V
V
V
µA
mA
mA
mA
mA
µA
V
V
V
mV
µA
dB
MHz
mA
mA
V
V
V
1/V
V
µA
ns
mV
V
V
V
V
3/13
Page 3
Part Number L6561
Manufactur STMicroelectronics
Description POWER FACTOR CORRECTOR
Total Page 13 Pages
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