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STMicroelectronics
STMicroelectronics

L6561 Datasheet

POWER FACTOR CORRECTOR


L6561 Datasheet Preview


® L6561
POWER FACTOR CORRECTOR
VERY PRECISE ADJUSTABLE OUTPUT
OVERVOLTAGE PROTECTION
MICROPOWERSTART-UPCURRENT (50µATYP.)
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
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.
Minidip
SO8
ORDERING NUMBERS:
L6561 (Minidip)
L6561D (SO8)
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 onthe 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.
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
2.3V
1.8V
UVLO
ZERO CURRENT
- DETECTOR
+
RQ
S
DRIVER
STARTER
VCC
7
GD
6
GND
5
ZCD
DISABLE
D97IN547B
April 1999
1/11
Page 1

L6561
ABSOLUTE MAXIMUM RATINGS
Symbol
IVcc
IGD
INV, COMP
MULT
CS
ZCD
Pin
8
7
1, 2, 3
Parameter
ICC + IZ
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
(Minidip)
(SO8)
PIN CONNECTION
Value
30
±700
-0.3 to 7
-0.3 to 7
50 (source)
-10 (sink)
1
0.65
-25 to 150
-55 to 150
Unit
mA
mA
V
V
mA
mA
W
°C
°C
THERMAL DATA
Symbol
Rth j-amb
Parameter
Thermal Resistance Junction-ambient
SO 8
150
MINIDIP
100
Unit
°C/W
PIN FUNCTIONS
N. Name
1 INV
2 COMP
3 MULT
4 CS
5 ZCD
6 GND
7 GD
8 VCC
Function
Inverting input of the error amplifier. A resistive divider is connected between the output
regulated voltage and this point, to provide voltage feedback.
Output of error amplifier. A feedback compensation network is placed between this pin and
the INV pin.
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.
Input to the comparator of the control loop. The current is sensed by a resistor and the
resulting voltage is applied to this pin.
Zero current detection input. If it is connected to GND, the device is disabled.
Current return for driver and control circuits.
Gate driver output. A push pull output stage is able to drive the Power MOS with peak current
of 400mA (source and sink).
Supply voltage of driver and control circuits.
2/11
Page 2

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