LX1562IDM

Manufacturer Part NumberLX1562IDM
DescriptionIC CONTROLLER PFC 13.1V 8SOIC
ManufacturerMicrosemi Analog Mixed Signal Group
LX1562IDM datasheet
 

Specifications of LX1562IDM

ModeDiscontinuous Conduction (DCM)Frequency - Switching1.7MHz
Current - Startup200µAVoltage - Supply11 V ~ 25 V
Operating Temperature0°C ~ 100°CMounting TypeSurface Mount
Package / Case8-SOICLead Free Status / RoHS StatusLead free / RoHS Compliant
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T
I
P
H E
N F I N I T E
O W E R
O F
D E S C R I P T I O N
The LX1562 is a second-generation
family
of
power
factor
correction
controllers using a discontinuous mode of
operation.
They are optimized for
electronic ballast applications.
improvements have been made over the
original SG3561A controller introduced by
Silicon General Semiconductor in 1992.
New features include the addition of an
internal start-up circuit eliminating bulky
external
components
while
allowing
independent boost converter operation.
Addition of internal current sense blanking
eliminating the need for an external R/C
filter network.
Internal clamping of the
error amplifier and multiplier outputs
improves turn on overshoot characteristics
and current limiting.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
P R O D U C T H I G H L I G H T
Typical Application Of The LX1562 In An 80W Fluorescent
Lamp Ballast With Active Power Factor Control
450µH
61T #22AWG
L1
100k
D1
D3
½W
7T
R3
D5
C2
22µF
AC+
2.2M
R1
1%
R10
120V
4.7M
AC
C1
1µF
250V
AC-
D2
D4
29k
R2
1%
C4
.01µF
Note: Thick trace on schematic shows high-frequency, high-current path in circuit.
Lead lengths must be minimized to avoid high-frequency noise problems.
T
(°C)
A
0 to 100
Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX5241CDB-
TR).
L
Copyright © 1996
Rev. 1.3a,2005-03-09
11861 W
ESTERN
S
- G
E C O N D
P
R O D U C T I O N
I
N N O V A T I O N
Special circuitry has also been added to
prevent no load runaway conditions. And
finally, output drive clamps limiting power
MOSEFT gate drive independent of supply
Many
voltage greatly enhance the products
practical application.
Although the IC design has been
optimized
for
electronic
applications, it can also be used for power
factor correction in lower power (typical <
300W) AC-DC converters. One unique
feature of the device is encompassed by
the addition of internal logic circuitry to
detect zero crossing of the inductor current
thus maintaining the discontinuous current
mode of operation. This feature prevents
large current gaps from appearing thereby
minimizing
distortion
and
power factor correction.
V
BOOST
MR854
230V
R4
D7
22k
1N4935
1MΩ
D6
R7
1%
5
1N4148
8
V
I
IN
DET
47Ω
OUT
1RF730
7
R5
C6
R9 620k
100µF
MULT
400V
C5
2
IN
3
COMP
0.1µF
11k
C3
1
R8
INV
1%
4
C.S.
GND
3x
R6
6
1/4W
1.3Ω
PACKAGE ORDER INFO
Plastic DIP
M
DM
8-Pin
RoHS Compliant / Pb-free
RoHS Compliant / Pb-free
Transition D/C: 0503
LX1562IM
LX1563IM
F
M
I N
I N I T Y
I C R O E L E C T R O N I C S
A
, G
G
, CA. 92841, 714-898-8121, F
VENUE
ARDEN
ROVE
LX1562/1563
P
F
C
E N E R A T I O N
O W E R
A C T O R
O N T R O L L E R
D
S
A T A
H E E T
K E Y F E A T U R E S
Internal Start-Up Circuit
Internal Current Sense Blanking
Improved MicroPower Start-Up
Current (300µA maximum)
Clamped E.A. Output For Lower
Turn-On Overshoot
Multiplier Clamp Limits Maximum
Input Current
Internal Over Voltage Protection
ballast
Replaces Built-In C.S. Offset
PWM Output Clamp Limits
MOSFET Gate Drive Voltage
Increased UVLO Hysteresis
Reduces Start-Up Timing
(LX1562 Only)
Low Operating Current
Consumption
Internal 1.5% Reference
Totem Pole Output Stage
Automatic Current Limiting of
Boost Stage
enhancing
Discontinuous Mode of
Operation With No Current Gaps
No Slope Compensation
Required
K E Y F E A T U R E S
Electronic Ballast
Switching Power Supplies
Available Options Per Part #
Start-Up
Part #
Voltage
LX1562
13.1V
LX1563
9.8V
Plastic SOIC
8-Pin
Transition D/C: 0440
LX1562IDM
LX1563IDM
I
.
N C
: 714-893-2570
AX
Hysteresis
Voltage
5.2V
2.1V
1

LX1562IDM Summary of contents

  • Page 1

    ... Boost Stage enhancing Discontinuous Mode of Operation With No Current Gaps No Slope Compensation Required Electronic Ballast Switching Power Supplies Available Options Per Part # Start-Up Part # Voltage LX1562 13.1V LX1563 9.8V Plastic SOIC 8-Pin Transition D/C: 0440 LX1562IDM LX1563IDM 714-893-2570 AX Hysteresis Voltage 5.2V 2.1V 1 ...

  • Page 2

    LX1562/1563 ...

  • Page 3

    ...

  • Page 4

    LX1562/1563 S Parameter Current Sense Comparator Section Input Bias Current Current Sense Delay to Output C.S. ...

  • Page 5

    ...

  • Page 6

    LX1562/1563 S GRAPH / CURVE INDEX Characteristic Curves FIGURE # 1. E.A. OUTPUT VOLTAGE vs. C.S. ...

  • Page 7

    FIGURE 1. — E.A. OUTPUT VOLTAGE vs. C.S. THRESHOLD 1.4 ...

  • Page 8

    LX1562/1563 S FIGURE 5. — E.A. INPUT BIAS CURRENT vs. TEMPERATURE 0.5 0.4 0.3 0.2 0.1 ...

  • Page 9

    FIGURE 9. — START-UP THRESHOLD vs. TEMPERATURE 14.0 LX1562 13.5 ...

  • Page 10

    LX1562/1563 S FIGURE 13. — I THRESHOLD HIGH vs. TEMPERATURE DET 1.90 1.85 1.80 1.75 1.70 ...

  • Page 11

    FIGURE 17. — C.S. BLANKING TIME vs. TEMPERATURE 1000 900 ...

  • Page 12

    LX1562/1563 S FIGURE 21. — SUPPLY CURRENT vs. SUPPLY VOLTAGE 14 LX1562 ...

  • Page 13

    The operation of the IC is best described by referring ...

  • Page 14

    LX1562/1563 S VOLTAGE REFERENCE (continued DISCHARGE V START V HYST R & C ...

  • Page 15

    MULTIPLIER The LX1562/63 features a one quadrant multiplier stage having ...

  • Page 16

    LX1562/1563 S CURRENT DETECT LOGIC (continued) upper 7.8V clamp prevents input overvoltage breakdown dur- ing switch ...

  • Page 17

    TYPICAL APPLICATION The application circuit shown in Figure 31 uses ...

  • Page 18

    LX1562/1563 S OUTPUT VOLTAGE REQUIREMENT 0.2 0. ...

  • Page 19

    INDUCTOR DESIGN (continued) Step 2: Choose a core with higher ...

  • Page 20

    LX1562/1563 S ERROR AMPLIFIER COMPONENT SELECTION Capacitor C5 is primarily selected to reject the output ripple ...

  • Page 21

    POWER MOSFET SELECTION The voltage rating of MOSFET and rectifier ...

  • Page 22

    LX1562/1563 AC+ R1 120V Note: Thick ...

  • Page 23

    AC+ R1 220V C1 AC AC- R2 ...

  • Page 24

    LX1562/1563 AC+ R1 277V Note: Thick ...

  • Page 25

    AC+ R1 90-265V C1 AC AC- R2 ...