LC5540LD SANKEN [Sanken electric], LC5540LD Datasheet

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LC5540LD

Manufacturer Part Number
LC5540LD
Description
Single-Stage Power Factor Corrected Off-Line Switching Regulators
Manufacturer
SANKEN [Sanken electric]
Datasheet
Features and Benefits
• Integrated on-width control circuit (it realizes high power
• Integrated startup circuit (no external startup
• Integrated soft-start circuit (reduces power stress during
• Integrated bias assist circuit (improves the startup
• Integrated Leading Edge Blanking (LEB) circuit
• Integrated maximum on-time limit circuit
• Dual-chip structure, with an avalanche-guaranteed power
• Protection features:
Package: 8-pin DIP
LC5540LD-DS
factor by average current control)
circuit necessary)
start-up on the incorporated power MOSFET and rectifier)
performance, suppresses V
operation, allows reduction of VCC capacitor value as well
as use of a ceramic capacitor)
MOSFET (allows simplified surge suppressing circuits)
▫ Overcurrent protection (OCP): pulse-by-pulse
▫ Overvoltage protection (OVP): latched shutdown
▫ Overload protection (OLP): latched shutdown
▫ Thermal shutdown (TSD): latched shutdown
VAC
C3
F1
C1
(Rocp)
R2
1
8
S/GND VCC
D/ST
LC554xLD
L1
C5
R3
U1
2
OVP
Control
D1
D3
Part
6
3
OCP
C6
4
D7
5
CC
NF
FB
D2
D4
S/GND
R7
voltage droop during
L2
PC1
C2
PC2
R6
C7
SANKEN ELECTRIC CO., LTD.
C4
D5
C8
D6
R4
D9
Not to scale
R1
Typical Application
R5
C17
T1
Single-Stage Power Factor Corrected
Description
LC5540LD series is a quasi-resonant topology switching
power supply IC, designed for input capacitorless applica-
tions, and making it possible for systems to comply with the
harmonics standard (IEC61000-3-2 class C). It incorporates
separate controller and power MOSFET chips. The control-
ler adapts the average current control method for realizing
high power factors, and the quasi-resonant topology contrib-
utes to high efficiency and low EMI noise. The rich set of
protection features helps to realize low component counts,
and high performance-to-cost power supply.
The LC5540LD devices are intended for isolated designs.
The incorporated MOSFET has a V
650 V (LC5545LD and LC5546LD) to 800 V (LC5548LD).
The R
(LC5545LD). It is capable of a maximum output power
of 20 W on 230 VAC supply to 16 W on universal supply
(LC5546LD) 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.
Applications
• LED lighting fixtures
• LED light bulbs
C9
C11
D8
DS(on)
Off-Line Switching Regulators
PC2
C10
(max) is 1.9 Ω (LC5546LD) to 3.95 Ω
R9
DZ2
R8
DZ1
R10
Q1
LC5540LD Series
R12
PC1
C12
U2
C13
R11
R13
C14
+
R17
-
DSS
R16
R14
R15
(min) rating from
C15
R18
R19 R20
C16
LED

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LC5540LD Summary of contents

Page 1

... EMI noise. The rich set of protection features helps to realize low component counts, and high performance-to-cost power supply. The LC5540LD devices are intended for isolated designs. The incorporated MOSFET has a V 650 V (LC5545LD and LC5546LD) to 800 V (LC5548LD). ...

Page 2

... Operating Ambient Temperature Storage Temperature Channel Temperature 1 Refer to MOSFET Safe Operating Area Curve. 2 Refer to MOSFET Avalanche Energy Derating Coefficient Curve. 3 Refer to MOSFET Temperature versus Power Dissipation Curve. LC5540LD-DS Single-Stage Power Factor Corrected On-Time (typ) t (typ) OSC ON(MAX) (kHz) (μs) 230 VAC 72 9 ...

Page 3

... Operation Voltage Overload Protection (OLP) Threshold Voltage OVP Pin OVP Threshold Voltage VCC Pin OVP Threshold Voltage Thermal Shutdown Activating Temperature *V > V always. CC(BIAS) CC(OFF) LC5540LD-DS Single-Stage Power Factor Corrected T = 25° unless otherwise specified A CC Symbol Test Conditions V CC(ON) V ...

Page 4

... LC5540LD Series ELECTRICAL CHARACTERISTICS (MOSFET) Characteristic Drain-to-Source Breakdown Voltage Drain Leakage Current On-Resistance Switching Time Thermal Resistance LC5540LD-DS Single-Stage Power Factor Corrected T = 25°C, unless otherwise specified A Symbol Test Conditions LC5545LD V LC5546LD DSS LC5548LD I DSS LC5545LD R LC5546LD DS(ON) LC5548LD LC5545LD t LC5546LD ...

Page 5

... MOSFET Avalanche Energy Derating Coefficient Curve 100 100 Channel Temperature (° 0.1 0.01 10 –6 LC5540LD-DS Single-Stage Power Factor Corrected Characteristic Performance LC5545LD 100 125 150 MOSFET Temperature versus Power Dissipation Curve 125 150 Transient Thermal Resistance Curve 10 –5 10 –4 10 –3 Time (s) SANKEN ELECTRIC CO ...

Page 6

... MOSFET Avalanche Energy Derating Coefficient Curve 100 100 Channel Temperature (° 0.1 0.01 10 –6 LC5540LD-DS Single-Stage Power Factor Corrected Characteristic Performance LC5546LD 100 125 150 MOSFET Temperature versus Power Dissipation Curve 125 150 Transient Thermal Resistance Curve 10 –5 10 –4 10 –3 Time (s) SANKEN ELECTRIC CO ...

Page 7

... MOSFET Avalanche Energy Derating Coefficient Curve 100 100 Channel Temperature (° 0.1 0.01 10 –6 LC5540LD-DS Single-Stage Power Factor Corrected Characteristic Performance LC5548LD 100 125 150 MOSFET Temperature versus Power Dissipation Curve 125 150 Transient Thermal Resistance Curve 10 –5 10 –4 10 –3 Time (s) SANKEN ELECTRIC CO ...

Page 8

... OVP OCP ③ NF ⑤ Pin-out Diagram 8 D/ST S/GND 1 VCC 2 6 OVP OCP LC5540LD-DS Single-Stage Power Factor Corrected Functional Block Diagram Functional Block Diagram Functional Block Diagram VCC ② START UP TSD UVLO Reg Bias OVP S R Bottom OSC Detection OCP LEB ...

Page 9

... LC5540LD Series +0.3 1.0 -0.05 0.89 TYP Unit : mm Leadframe Material : Cu Pin treatment: Solder Plating Weight : Approximately 0.51g Pb-free. Device composition compliant with the RoHS directive. LC5540LD-DS Single-Stage Power Factor Corrected Package Outline Drawing, DIP8 9.4 ±0 +0.3 1.52 -0.05 2.54 TYP 0.5 ±0.1 a: Part #: 554x ...

Page 10

... Type G746 Shin-Etsu Chemical Co., Ltd. YG6260 MOMENTIVE Performance Materials, Inc SC102 Dow Corning Toray Co., Ltd. LC5540LD-DS Single-Stage Power Factor Corrected Soldering • When soldering the products, please be sure to minimize the working time, within the following limits: 260±5°C 380±10°C • ...

Page 11

... 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 distribution network. • The contents in this document must not be transcribed or copied without Sanken’s written consent. LC5540LD-DS Single-Stage Power Factor Corrected Off-Line Switching Regulators SANKEN ELECTRIC CO ...

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