LC5560LD Datasheet, PDF (1/10 Pages) Sanken electric – LC5560LD Series Single-Stage Power Factor Corrected Off-Line Switching Regulators for LEDs

LC5560LD Series
LC5560LD Series Single-Stage Power Factor Corrected
Off-Line Switching Regulators for LEDs
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 V_CC 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
• Dual-chip structure, with an avalanche-guaranteed power
MOSFET (allows simplified surge suppressing circuits)
• 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
Not to scale
Description
The LC5560LD series is the power IC for the non-iso-
lated type LED driver which has an incorporated power
MOSFET, designed for input capacitorless applications, and
making it possible for systems to comply with the harmon-
ics standard (IEC61000-3-2 class C).
The controller adapts the average current control method for
realizing high power factors, and the quasi-resonant topol-
ogy contributes to high efficiency and low EMI noise.
The incorporated MOSFET has a V_DSS(min) rating of
650 V. The R_DS(on)(max) is 1.9 Ω (LC5566LD) to 3.95 Ω
(LC5565LD). It is capable of a maximum output power
of 20 W on 230 VAC supply to 16 W on universal supply
(LC5566LD) 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 applications with
low output voltage or short duty cycle. The PWM oscilla-
tion frequency ranges from 60 kHz (LC5566LD) to 72 kHz
(LC5565LD).
The series is housed in DIP8 packages. The rich set of pro-
tection features helps to realize low component counts, and
high performance-to-cost power supply.
Applications
• LED lighting fixtures
• LED light bulbs
F1
VAC _C1
L1
D1
D3
Typical Application
D2 L2
T1
D4
C8
R5
C2
U1
LC556x LD
8
6
D/ST ISENSE
5
VREF
C3
Control
Part
S/GND VCC OCP COMP
1
2
34
D9
D5
R1
C4
D6
R4
C11
D8
C9
DZ1
C10 ^R6
R7
LE D
R8 C12
LC5560LD-DS
C5
C6
R2
(Rocp)
D7
C7
R3
SANKEN ELECTRIC CO., LTD.