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PDF LC5556LD Data sheet ( Hoja de datos )

Número de pieza LC5556LD
Descripción Single-Stage Power Factor Corrected High Efficiency Non-Isolated Buck LED Driver
Fabricantes SANKEN 
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LC5550LD Series
Single-Stage Power Factor Corrected
High Efficiency Non-Isolated Buck LED Driver
Features and Benefits
• PWM and quasi-resonant topology
• Integrated on-time control circuit (it realizes high power
factor by average current control)
• 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): latched shutdown
Overload protection (OLP): latched shutdown
Thermal shutdown (TSD): latched shutdown
Package: 8-pin DIP
Description
LC5550LD series are PWM and quasi-resonant topology
non-isolated buck LED driver ICs. They incorporate sepa-
rate controller and power MOSFET chips, and are designed
for input capacitorless applications. The controller adapts
the average current control method for realizing high power
factors. The rich set of protection features helps to realize
low component counts, and high performance-to-cost power
supply.
Applications
• LED lighting fixtures
• LED light bulbs
Not to scale
Typical Application
R1 D6
D3
VAC
D1
D4
D2
5
NF
6
ISENSE
D/ST
8
U1
LC5550LD
CO MP
4
3 OCP/BD
2 VCC
1 S/GND
C1
R2
C3
C2
C4 C5 C6
R3
R5
R4
D5
T1
C7 R6
LED
LC5550LD-DS
SANKEN ELECTRIC CO., LTD.
July 9, 2012
http://www.Datasheet4U.com

1 page




LC5556LD pdf
LC5550LD
Series
Single-Stage Power Factor Corrected
High Efficiency Non-Isolated Buck LED Driver
Characteristic Performance
LC5555LD
MOSFET Safe Operating Area Curve
10
S. O. A. Temperature Derating Coefficient Curve
100
Drain current limited
by on-resistance
0.1 ms
80 1 1 ms
60
40
20 0.1
0
0 255 07 5 100 125 150
Channel Temperature, Tch (°C)
MOSFET Avalanche Energy Derating Coefficient Curve
100
To use this graph, apply the S.O.A
temperature derating coefficient
taken from the graph at the left
0.01
1
10 100 1000
Drain-to-Source Voltage, VDS (V)
MOSFET Temperature versus Power Dissipation Curve
1.2
80 1.0
0.8
60
0.6
40
0.4
20 0.2
0
25 50 75 100 125 150
Channel Temperature, Tch (°C)
0
0 255 07 5 100 125 150
Ambient Temperature, TA (°C)
Transient Thermal Resistance Curve
10
1
0.1
LC5550LD-DS
0.01
10–6
10–5
10–4
10–3
Time (s)
10–2
SANKEN ELECTRIC CO., LTD.
10–1
5
July 9, 2012

5 Page





LC5556LD arduino
LC5550LD
Series
Single-Stage Power Factor Corrected
High Efficiency Non-Isolated Buck LED Driver
• 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.
LC5550LD-DS
SANKEN ELECTRIC CO., LTD.
11
July 9, 2012

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