LC5523F
Description
The LC5500 series is a quasi-resonant topology switching
power supply IC, designed for input capacitorless applica-
tions, and making it possible for systems to comply with the
harmonics standard (IEC61000-3-2 class C). It incorporates
separate controller and power MOSFET chips. The control-
ler adapts the average current control method for realizing
high power factors, and the quasi-resonant topology contrib-
utes to high efficiency and low EMI noise. The rich set of
protection features helps to realize low component counts,
and high performance-to-cost power supply.
The LC5523F is intended for isolated designs. The incor-
porated MOSFET has a VDSS(min) rating of 650 V and
RDS(on)(max) of 1.9 Ω. It is capable of a maximum output
power of 60 W on 230 VAC supply and 40 W on universal
supply based on the thermal rating. Note that the maximum
output power can be up to 120% to 140% of this value.
However, it may be limited in applications with low output
voltage or short duty cycle.
Features and Benefits
• Integrated on-width control circuit (it realizes high power
factor by average current control)
• Integrated startup circuit (no external startup
circuit necessary)
• Integrated soft-start circuit (reduces power stress during
start-up on the incorporated power MOSFET and
output diode)
• Integrated bias assist circuit (improves the startup
performance, suppresses VCC voltage droop during
operation, allows reduction of VCC capacitor value as well
as use of a ceramic capacitor)
• Integrated Leading Edge Blanking (LEB) circuit
• Integrated maximum on-time limit circuit
• Dual-chip structure, with an avalanche-guaranteed power
MOSFET (allows simplified surge suppressing circuits)
• Protection features:
▫ Overcurrent protection (OCP): pulse-by-pulse
▫ Overvoltage protection (OVP): pins VCC, OVP, and
OCP, intermittent oscillation operation
▫ Overload protection (OLP): intermittent oscillation
operation
▫ Thermal shutdown (TSD): halts switching operation and
latches in the off-state
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
Typical Application
Package: 7-pin TO-220F
VCC
S/GND
FB
OVP
Controller
Chip
D/ ST
LC5523F
25
6
7
4
1
OCP
PC1
PC2
V
IN
(AC)
LED
PC2 PC1
+
–
Not to scale
LF 3052 LF 3054
LF 3051
48102.004
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
2
Selection Guide
Part Number Package Packing
LC5523F TO-220F
(specify leadform when ordering) 50 pieces per tube
Absolute Maximum Ratings TA = 25°C, unless otherwise specified
Characteristic Symbol Notes Pins Rating Unit
Drain Current1IDPeak Single pulse 1 – 2 9.2 A
Single Pulse Avalanche Energy2EAS ILPeak = 2.9 A, VDD = 99 V, L = 20 mH 1 – 2 99 mJ
Input Voltage in Control Part VCC 4 – 2 35 V
OCP Terminal Voltage VOCP 5 – 2 2.0 to 5.0 V
FB Terminal Voltage VFB 6 – 2 0.3 to 7.0 V
OVP Terminal Voltage VOVP 7 – 2 0.3 to 5.0 V
Power Dissipation of MOSFET3PD1
With infinite heatsink 1 – 2 20.2 W
Without heatsink 1 – 2 1.8 W
Internal Leadframe Temperature in
Operation TF20 to 115 °C
Operating Ambient Temperature TOP 55 to 115 °C
Storage Temperature Tstg 55 to 125 °C
Channel Temperature Tch 150 °C
1Refer to MOSFET Safe Operating Area Curve.
2Refer to MOSFET Avalanche Energy Derating Coefficient Curve.
3Refer to MOSFET Temperature versus Power Dissipation Curve.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
3
S/GND
Q
S
R
Thermal
Shutdown
LEB
D/ST
FB
Startup
Reg
Bias
UVLO
VCC
OCP
OVP
OVP
OSC
OCP
Detection
Bottom
Reg
Control
Feedback
OLP
Drv
Controller Chip
4
5
6
7
1
2
Functional Block DiagramFunctional Block DiagramFunctional Block Diagram
LC5523F Terminal List Table
Number Name Function
1 D/ST MOSFET drain terminal and input of the startup current
2 S/GND MOSFET source and GND terminal for the Controller chip
3 NC No connection
4 VCC Supply voltage input
5 OCP Overcurrent protection and quasi-resonant signal input terminal
6 FB Feedback signal input and Overload Protection (OLP) signal input
7 OVP Overvoltage Protection (OVP) signal input
Pin-out Diagrams
(LF 3052)
(LF 3051)
(LF 3054)
2
3
4
6
1
5
7
D/ST
S/GND
NC
VCC
OCP
FB
OVP
1
2
3
4
5
6
7
D/ST
S/GND
NC
VCC
OCP
FB
OVP
2
4
6
1
3
5
7
D/ST
S/GND
NC
VCC
OCP
FB
OVP
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
4
ELECTRICAL CHARACTERISTICS (Controller Chip)1 TA = 25°C, VCC = 20 V, unless otherwise specified
Characteristics Symbol Test Conditions Pins Min. Typ. Max. Unit
Power Supply Startup Operation
Operation Start Voltage VCC(ON) 4 – 2 13.8 15.1 17.3 V
Operation Stop Voltage VCC(OFF) 4 – 2 8.4 9.4 10.7 V
Circuit Current in Operation ICC(ON) 4 – 2 – – 3.7 mA
Startup Circuit Operation Voltage VSTARTUP 1 – 2 42 57 72 V
Startup Current ICC(STARTUP) VD/ST = 100 V, VCC = 13 V 4 – 2 5.5 3.0 1.0 mA
Startup Current Supplying Threshold
Voltage-1 VCC(BIAS)1 VD/ST = 100 V 4 – 2 9.5 11.0 12.5 V
Startup Current Supplying Threshold
Voltage-2 VCC(BIAS)2 VD/ST = 100 V 4 – 2 14.4 16.6 18.8 V
Normal Operation
Oscillation Minimum Frequency fOSC 1 – 2 11.0 14.0 18.0 kHz
Maximum On Time tON(MAX) 1 – 2 30.0 40.0 50.0 s
FB Terminal Minimum Voltage
in Feedback Operation VFB(MIN) 6 – 2 0.55 0.90 1.25 V
Maximum Feedback Current IFB(MAX) 6 – 2 10 25 40 A
Leading Edge Blanking Time tBW 5 – 2 500 ns
Quasi-Resonant Operation Threshold
Voltage-1 VBD(TH1) 5 – 2 0.14 0.24 0.34 V
Quasi-Resonant Operation Threshold
Voltage-2 VBD(TH2) 5 – 2 0.12 0.17 0.22 V
Protection Operation
Overcurrent Detection Threshold
Voltage VOCP 5 – 2 0.54 0.60 0.66 V
OCP Terminal Source Current IOCP 5 – 2 120 40 10 A
OVP Operation Voltage of OCP
Terminal VOCP(OVP) 5 – 2 2.2 2.6 3.0 V
OLP Threshold Voltage VFB(OLP)1 6 – 2 5.0 5.5 6.0 V
OLP Threshold Voltage VFB(OLP)2 6 – 2 4.1 4.5 4.9 V
OVP Terminal Threshold Voltage VOVP 7 – 2 1.6 2.0 2.4 V
OVP Operation Voltage of VCC
Terminal VCC(OVP) 4 – 2 28.5 31.5 34.0 V
Thermal Shutdown Operating
Temperature TJ(TSD) – 135 – – °C
1The current ratings are based on those of the IC, and plus (+) represents sink and minus (-) represents source.
2The relation of VCC(BIAS)1 > VCC(OFF) is applied for each product.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
5
ELECTRICAL CHARACTERISTICS (MOSFET) TA = 25°C, VCC = 20 V, unless otherwise specified
Characteristics Symbol Test Conditions* Pins Min. Typ. Max. Unit
Drain-to-Source Breakdown Voltage VDSS IDSS = 300 A 1 – 2 650 V
Drain Leakage Current IDSS VDSS = 650 V 1 – 2 300 A
Circuit Current in Operation RDS(on) IDS = 1.1 A 1 – 2 1.9
Switching Time tr1 – 2 400 ns
Thermal Resistance Rch-F Between channel and internal leadframe 3.1 °C/W
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
6
10
1
0.1
0.01
0.001
Transient Thermal Resistance, Rch-c (°C/W)
Transient Thermal Resistance Curve
Time (s)
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
Ambient Temperature, TA (°C)
30
25
20
15
10
5
0
With infinite heatsink
20.2
1.8 115
Without heatsink
0255075 125100 150
MOSFET Temperature versus Power Dissipation Curve
Allowable Power Dissipation, PD1 (W)
Channel Temperature, Tch (°C)
100
80
60
40
20
0
25 50 75 125100 150
EAS
Temperature Derating Coefficient (%)
MOSFET Avalanche Energy Derating Coefficient Curve
Drain-to-Source Voltage, VDS (V)
10
1
0.1
0.01 10 100 1000
MOSFET Safe Operating Area Curve
Drain current limited
by on-resistance
1 ms
0.1 ms
Drain Current, ID (A)
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
Channel Temperature, Tch (°C)
100
80
60
40
20
00 25 50 75 125100 150
Safe Operating Area
Temperature Derating Coefficient (%)
S. O. A. Temperature Derating Coefficient Curve
Characteristic Performance
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
7
Package Outline Drawing, TO-220F Leadform 3051
Leadframe plating Pb-free. Device composition
compliant with the RoHS directive.
b
a
LC
（5.6）
±0.2
（At base of pin）
（At base of pin）
（At tip of pin）
Front view Side view
（At tip of pin）
±0.3
＝5.85±0.15
5×P1.17±0.15
5±0.5
±0.2
（1.1）
±0.2
7
6
5
4
3
2
1
10
15
±0.510.4
7-0.55 +0.2
-0.1
7-0.62 ±0.15
2±0.15
2.8 +0.2
4.2
2.6
±0.12.6
R-end
5±0.5
R-end
-0.1
+0.2
0.45 2.54±0.6
5.08±0.6
0.50.5 0.50.5
Gate burr
Unit: mm
b: Lot number
1
st
letter: Last digit of year
2
nd
letter: Month
Jan to September: Numeric
October: O
November: N
December: D
3
rd
and 4
th
letter: Date
01 to 31: Numeric
5
th
letter: Internal use control number
Package: TO-220F-7L
(Sanken designator FMY207)
(Sanken leadform #3051)
Leadframe material: Cu
Pin plating: Solder Plating
Weight: Approximately 1.45 g
a: Part # 5523F
Ø3.2 ±0.2
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
8
Package Outline Drawing, TO-220F Leadform 3052
（5.6）
±0.2
±0.3
＝5.85±0.15
5×P1.17±0.15
5±0.5
±0.2
（1.1）
±0.2
765432
1
10
15
±0.5
10.4
7-0.55+0.2
-0.1
7-0.62 ±0.15
2±0.15
2.8 +0.2
4.2
2.6
±0.1
2.6
R-end
Front View Side View
-0.1
+0.2
0.45
5.08±0.6
0.5
0.5 0.50.5
b
a
Gate burr
LC
（At base of pin）
（At base of pin）
（At tip of pin）
Unit: mm
a: Part # 5523F
b: Lot number
1
st
letter: Last digit of year
2
nd
letter: Month
Jan to September: Numeric
October: O
November: N
December: D
3
rd
and 4
th
letter: Date
01 to 31: Numeric
5
th
letter: Internal use control number
Package: TO-220F-7L
(Sanken designator FMY207)
(Sanken leadform #3052)
Leadframe material: Cu
Pin plating: Solder Plating
Weight: Approximately 1.45 g
Ø3.2 ±0.2
Leadframe plating Pb-free. Device composition
compliant with the RoHS directive.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
9
Package Outline Drawing, TO-220F Leadform 3054
Leadframe plating Pb-free. Device composition
compliant with the RoHS directive.
0.50.5 0.50.5
7654
3
2
1
7-0.62
7-0.55
±0.210
(5.6)
±0.22.8
±0.315
±0.152
b
a
Gate burr
-0.1
+0.2
±0.53.8
3-( R1)
±0.55
2.5
2.8
±0.2
2.6
(1.1)
±0.15
-0.1
+0.2
±0.12.6
4.2
±0.2
Ø3.2 ±0.2
0.45 ±0.5
±0.5
LC
（At base of pin）
5×P 1.17 ±0.15
= 5.85 ±0.15
Plan View Side View
（At base of pin）
（At tip of pin）
（At tip of pin）
Unit: mm
b: Lot number
1
st
letter: Last digit of year
2
nd
letter: Month
Jan to September: Numeric
October: O
November: N
December: D
3
rd
and 4
th
letter: Date
01 to 31: Numeric
5
th
letter: Internal use control number
Package: TO-220F-7L
(Sanken designator FMY207)
(Sanken leadform #3054)
Leadframe material: Cu
Pin plating: Solder Plating
Weight: Approximately 1.45 g
a: Part # 5523F
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
10
540 ±2
ANTISTATIC
620
125
185
14.5
4.5
34.5
4.8 ± 0.3
1.5 ± 0. 3 2.1
17.3 15. 6± 0.3
611(15.9)
50 pieces per tube
Tube dimensions (mm)
Carton dimensions (mm)
36 tubes per carton (maximum)
1800 pieces maximum per carton
Packing Specifications, TO-220F Leadforms 3051 and 3052
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
11
Packing Specifications, TO-220F Leadform 3054
621
137
186
540 ±2
ANT ISTAT IC
9.9
15
14.5
1.82.5
7.2
±0.43.4 2.6
35
15.8 17.8
4.8
50 pieces per tube
Tube dimensions (mm)
Carton dimensions (mm)
40 tubes per carton (maximum)
2000 pieces maximum per carton
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
12
Because reliability can be affected adversely by improper storage
environments and handling methods, please observe the following
cautions.
Cautions for Storage
• Ensure that storage conditions comply with the standard
temperature (5°C to 35°C) and the standard relative humidity
(around 40% to 75%); avoid storage locations that experience
extreme changes in temperature or humidity.
• Avoid locations where dust or harmful gases are present and
avoid direct sunlight.
• Reinspect for rust on leads and solderability of products that have
been stored for a long time.
Cautions for Testing and Handling
When tests are carried out during inspection testing and other
standard test periods, protect the products from power surges
from the testing device, shorts between the product pins, and
wrong connections.
Remarks About Using Silicone Grease with a Heatsink
• When silicone grease is used in mounting this product on a
heatsink, it shall be applied evenly and thinly. If more silicone
grease than required is applied, it may produce excess stress.
• Volatile-type silicone greases may crack after long periods of
time, resulting in reduced heat radiation effect. Silicone grease
with low consistency (hard grease) may cause cracks in the mold
resin when screwing the product to a heatsink.
• Our recommended silicone greases for heat radiation purposes,
which will not cause any adverse effect on the product life, are
indicated below:
Type Suppliers
G746 Shin-Etsu Chemical Co., Ltd.
YG6260 Momentive Performance Materials Holding, Inc.
SC102 Dow Corning Toray Co., Ltd.
Soldering
• When soldering the products, please be sure to minimize the
working time, within the following limits:
260±5°C 10 s
350±5°C 3 s (solder iron)
• Soldering iron should be at a distance of at least 1.5 mm from the
body of the products
Electrostatic Discharge
• When handling the products, the operator must be grounded.
Grounded wrist straps worn should have at least 1 M of
resistance from the operator to ground to prevent shock hazard,
and it should be placed near the operator.
• Workbenches where the products are handled should be
grounded and be provided with conductive table and floor mats.
• When using measuring equipment such as a curve tracer, the
equipment should be grounded.
• When soldering the products, the head of soldering irons or the
solder bath must be grounded in other to prevent leak voltages
generated by them from being applied to the products.
• The products should always be stored and transported in Sanken
shipping containers or conductive containers, or be wrapped in
aluminum foil.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
13
Copyright © 2010 Allegro MicroSystems, Inc.
This datasheet is based on Sanken datasheet SSE-24682
The products described herein are manufactured in Ja pan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc.
Sanken and Allegro reserve the right to make, from time to time, such de par tures from the detail spec i fi ca tions as may be re quired to per mit im-
prove ments in the per for mance, reliability, or manufacturability of its prod ucts. Therefore, the user is cau tioned to verify that the in for ma tion in this
publication is current before placing any order.
When using the products described herein, the ap pli ca bil i ty and suit abil i ty of such products for the intended purpose shall be reviewed at the users
responsibility.
Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the products herein and
Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or any other rights of Sanken,
Allegro, or any third party which may result from its use.
When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically or otherwise
processing or treating the products, please duly consider all possible risks that may result from all such uses in advance and proceed therewith at your
own responsibility.
Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products
at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the
equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction.
Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or appa-
ratus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Please return to us this document with your
signature(s) or seal(s) prior to the use of the products herein.
When considering the use of Sanken products in the applications where higher reliability is required (traffic signal control systems o equipment, fire/
crime alarm systems, various safety devices, etc.), please contact your nearest Sanken sales representative to discuss, and then return to us this docu-
ment with your signature(s) or seal(s) prior to the use of the products herein.
The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required (aerospace equip-
ment, nuclear power control systems, life support systems, etc.) is strictly prohibited.
Anti radioactive ray design is not considered for the products listed herein.
The information in clud ed herein is believed to be accurate and reliable. Ap pli ca tion and operation examples described in this pub li ca tion are given
for reference only and Sanken and Allegro assume no re spon si bil i ty for any in fringe ment of in dus tri al property rights, intellectual property rights, or
any other rights of Sanken or Allegro or any third party that may result from its use. The contents in this document must not be transcribed or copied
without Sanken’s written consent.
Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken's distribution network.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Single-Stage Power Factor Corrected
Of f-Line Switching Regulator IC
LC5523F
14
Asia-Pacific
China
Sanken Electric Hong Kong Co., Ltd.
Suite 1026, Ocean Centre
Canton Road, Tsimshatsui
Kowloon, Hong Kong
Tel: 852-2735-5262, Fax: 852-2735-5494
Sanken Electric (Shanghai) Co., Ltd.
Room 3202, Maxdo Centre
Xingyi Road 8, Changning District
Shanghai, China
Tel: 86-21-5208-1177, Fax: 86-21-5208-1757
Sanken Electric (Shanghai) Co., Ltd.
Shenzhen Office
Room 1013, Xinhua Insurance Building
Mintian Road, Futian District
Shenzhen City, Guangdong, China
Tel: 86-755-3391-9356/9358, Fax: 86-755-3391-9368
Taiwan Sanken Electric Co., Ltd.
Room 1801, 18th Floor
88 Jung Shiau East Road, Sec. 2
Taipei 100, Taiwan R.O.C.
Tel: 886-2-2356-8161, Fax: 886-2-2356-8261
Japan
Sanken Electric Co., Ltd.
Overseas Sales Headquarters
Metropolitan Plaza Building
1-11-1 Nishi-Ikebukuro, Toshima-ku
Tokyo 171-0021, Japan
Tel: 81-3-3986-6164, Fax: 81-3-3986-8637
Korea
Sanken Electric Korea Co., Ltd.
Samsung Life Yeouido Building 16F
23-10, Yeouido-Dong, Yeongdeungpo-gu
Seoul 150-734, Korea
Tel: 82-2-714-3700, Fax: 82-2-3272-2145
Singapore
Sanken Electric Singapore Pte. Ltd.
152 Beach Road, #10-06 The Gateway East
Singapore 189721
Tel: 65-6291-4755, Fax: 65-6297-1744
Europe
Sanken Power Systems (UK) Limited
Pencoed Technology Park
Pencoed, Bridgend CF35 5HY, United Kingdom
Tel: 44-1656-869-100, Fax: 44-1656-869-162
North America
United States
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01606, U.S.A.
Tel: 1-508-853-5000, Fax: 1-508-853-7895
Allegro MicroSystems, Inc.
14 Hughes Street, Suite B105
Irvine, California 92618, U.S.A.
Tel: 1-949-460-2003, Fax: 1-949-460-7837
Worldwide Contacts
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
