LC5523F Datasheet, PDF (1/11 Pages) Sanken electric – Hybrid IC

LC5523F
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 LC5523F is intended for isolated designs. The incor-
porated MOSFET has a V_DSS(min) rating of 650 V and
R_DS(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
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
U1
LC5523F
Control
Part
D2 L2
C11
T1
D4
C2
Vcc
C8
R5
D9
D5 R1
D8
R10
PC2
R8
C9
C10
Q1
R13
R9
PC1 R11
R14
C4
PC2
R6
D6
C17
DZ2
DZ1
R12 ^C13 R17
-
C12 ^{U2 +}
C14
R15
R18
C15
R16 ^{R19 R20}
D/ST S/GND NC VCC OCP FB OVP
12
34 5 6 7
R7
C3
R4
C5
C6
PC1
C18 DZ3
R21
R_OCP
R3
D7
C7
LED
C16
LC5523F-DS
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
November 26, 2012