LC5511D Datasheet, PDF (1/9 Pages) Sanken electric – Hybrid IC

LC5511D
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, ISENSE, and
OCP, auto restart
▫ Overload protection (OLP): auto restart
▫ Thermal shutdown (TSD): latched shutdown
Package: 8-pin DIP
Not to scale
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 LC5511D is intended for non-isolated designs. The
incorporated MOSFET has a V_DSS(min) rating of 650 V and
R_DS(on)(max) of 3.95 Ω. It is capable of a maximum output
power of 13 W on 230 VAC supply and 10 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
F1
VAC _C1
L1
D1
D3
Typical Application
D2 L2
T1
D4
C8
R5
C2
U1
LC5511D
8
4
D/ST COMP
S/GND
5
NC
C3
Control
Part
S/GND VCC OCP ISENSE
1
2
36
D9
D5
R1
C4
D6
R4
C11
D8
C9
DZ1
C10
R6
DZ2 R7
LE D
R8 C12
C5
C6
R_OCP
R3
D7
C7
LC5511D-DS
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
November 26, 2012