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LC5525F Datasheet(PDF) 1 Page - Sanken electric

No. de pieza LC5525F
Descripción Electrónicos  Hybrid IC
Download  11 Pages
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Fabricante Electrónico  SANKEN [Sanken electric]
Página de inicio  http://www.sanken-ele.co.jp/en
Logo SANKEN - Sanken electric

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SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
LC5525F
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.
Single-Stage Power Factor Corrected
Off-Line Switching Regulator IC
Typical Application
Package: 7-pin TO-220F
Not to scale
LF 3052
LF 3054
LF 3051
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
T1
C2
D1
D3
D2
D4
F1
L1
C1
D5
L2
D6
D9
D8
+
-
PC1
U2
DZ1
Q1
DZ2
LED
PC2
C4
PC2
D7
R1
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
7
OVP
R4
R5
R6
VA C
PC1
R7
C7
C8
C10
C11
C12
C13
C14
C15
C16
C9
C17
Vcc
6
OCP FB
C6
5
4
VCC
3
NC
S/GND
2
R20
1
D/ST
U1
C5
C3
R
OCP
R3
LC5525F
Control
Part
DZ3
R21
C18
November 26, 2012
Applications
• LED lighting fixtures
• LED light bulbs
LC5525F-DS


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