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PDF LC5525F Data sheet ( Hoja de datos )
| Número de pieza | LC5525F | |
| Descripción | power IC for the LED driver | |
| Fabricantes | SANKEN | |
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LC5525F
Single-Stage Power Factor Corrected
Off-Line Switching Regulator IC
Features and Benefits
• Integrated on-time 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 rectifier)
• Integrated bias assist circuit (improves startup
performance, suppresses VCC voltage droop during
operation, and allows use of low-rated ceramic capacitor
on VCC pin)
• Integrated Leading Edge Blanking (LEB) circuit
• Integrated maximum on-time limit circuit
• Protection features:
▫ Overcurrent protection (OCP): pulse-by-pulse
▫ Overvoltage protection (OVP): pins VCC, OVP, and
OCP, auto restart
▫ Overload protection (OLP): auto restart
▫ Thermal shutdown (TSD): latched shutdown
Package: 7-pin TO-220F
Not to scale
LF 3052
LF 3051
LF 3054
Description
The LC5500 series is the power IC for the LED driver
which has an incorporated power MOSFET, designed for
input capacitorless applications, and making it possible for
systems to comply with the harmonics standard (IEC61000-
3-2 class C). The controller adapts the average current
control method for realizing high power factors, and the
quasi-resonant topology contributes to high efficiency and
low EMI noise.
The rich set of protection features helps to realize low com-
ponent counts, and high performance-to-cost power supply.
The LC5525F is intended for isolated designs. The incor-
porated MOSFET has a VDSS(min) rating of 650 V and
RDS(on)(max) of 1.1 Ω. It is capable of a maximum output
power of 80 W on 230 VAC supply and 55 W on universal
input supply (85 to 265VAC), 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 applica-
tions with low output voltage or short duty cycle.
Applications
• LED lighting fixtures
• LED light bulbs
Typical Application
F1
VA C C1
L1
D1
D3
D2 L2
D4
C2
C8
R5
U1
LC5525F
D9
Vcc D5 R1
C4
Control
Part
PC2
R6
D/ST S/GND NC VCC OCP FB OVP
12
34 5 6 7
D6
R7
C3 R4
C5
C6
PC1
C18 DZ3
R21
ROCP
R3
D7 C7
C11
T1
D8
C9
C17
R10
PC2
R8
Q1
C10
R13
R9 PC1 R11
DZ2
DZ1
R12 C13 R17
-
C12 U2 +
C14
R14
R15
R18
C15
R16 R19 R20
LED
C16
LC5525F-DS
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
November 26, 2012
http://www.Datasheet4U.com
1 page  
LC5525F
Single-Stage Power Factor Corrected
Off-Line Switching Regulator IC
Characteristic Performance
MOSFET Safe Operating Area Curve
100
TA = 25°C, single pulse
S. O. A. Temperature Derating Coefficient Curve
100
80
Drain current limited
by on-resistance
10
0.1 ms
1 ms
60
1
40
20
0
0 25 50 75 100 125 150
Channel Temperature, Tch (°C)
MOSFET Avalanche Energy Derating Coefficient Curve
100
0.1
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
0.01
01
10
00
Drain-to-Source Voltage, VDS (V)
1000
MOSFET Temperature versus Power Dissipation Curve
30
80 25
23.6
20 With infinite heatsink
60
15
40
10
20
0
25 50 75 100 125 150
Channel Temperature, Tch (°C)
5
1.8
Without heatsink 115
0
0 25 50 75 100 125 150
Ambient Temperature, TA (°C)
Transient Thermal Resistance Curve
10
1
0.1
0.01
LC5525F-DS
0.001
10-6
10-5
10-4
10-3
Time (s)
10-2
SANKEN ELECTRIC CO., LTD.
10-1
5
November 26, 2012
5 Page 
LC5525F
Single-Stage Power Factor Corrected
Off-Line Switching Regulator IC
• The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the
latest revision of the document before use.
• Application and operation examples described in this document are quoted for the sole purpose of reference for the use of the prod-
ucts herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights or
any other rights of Sanken or any third party which may result from its use.
• Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semicon-
ductor 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 equip-
ment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.).
When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and
its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), and whenever
long life expectancy is required even in general purpose electronic equipment or apparatus, please contact your nearest Sanken sales
representative to discuss, 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 equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited.
• In the case that you use Sanken products or design your products by using Sanken products, the reliability largely depends on the
degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation range is set by derating the
load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. In general,
derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such
as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor products. For these stresses,
instantaneous values, maximum values and minimum values must be taken into consideration.
In addition, it should be noted that since power devices or IC's including power devices have large self-heating value, the degree of
derating of junction temperature affects the reliability significantly.
• 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.
• Anti radioactive ray design is not considered for the products listed herein.
• Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken's distribu-
tion network.
• The contents in this document must not be transcribed or copied without Sanken's written consent.
LC5525F-DS
SANKEN ELECTRIC CO., LTD.
11
November 26, 2012
11 Page | ||
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