EEWORLDEEWORLDEEWORLD

Part Number

Search

LC5547LF3054

Description
Power Factor Controller,
CategoryPower/power management    The power supply circuit   
File Size398KB,13 Pages
ManufacturerAllegro
Websitehttp://www.allegromicro.com/
Environmental Compliance
Download Datasheet Parametric Compare View All

LC5547LF3054 Overview

Power Factor Controller,

LC5547LF3054 Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerAllegro
package instruction,
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesPOWER FACTOR CONTROLLER
LC5540LF Series
Single-Stage Power Factor Corrected
Off-Line Switching Regulators
Features and Benefits
• Integrated on-width 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 rectifier)
• Integrated bias assist circuit (improves the startup
performance, suppresses V
CC
voltage droop during
operation, allows reduction of VCC capacitor value as well
as use of a ceramic capacitor)
• 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
Description
LC5540LF 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 LC5540LF devices are intended for isolated designs.
The incorporated MOSFET has a V
DSS
(min) rating from
650 V (LC5546LF and LC5547LF) to 800 V (LC5549LF).
The R
DS(on)
(max) is 1.1
Ω
(LC5547LF) to 1.9
Ω
(LC5546LF). It is capable of a maximum output power
of 80 W on 230 VAC supply to 55 W on universal supply
(LC5547LF) 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.
Packages: 7-pin TO-220F
Not to scale
Applications
LF 3052
LF 3051
LF 3054
• LED lighting fixtures
• LED light bulbs
F1
L1
D1
D2
L2
Typical Application
C11
T1
D8
PC2
C9
D9
D5
U1
LC554xLF
C4
DZ2
Control
Part
PC2
R6
D6
C17
DZ1
C12
U2
R1
R9
PC1
R12
C10
Q1
R13
R11
C13
R17
-
+
C14
R16
R14
R15
R18
C15
R19 R20
C16
LED
VAC
C1
D3
D4
C2
C8
R5
R8 R10
D/ST S/GND VCC OCP FB NC OVP
1
C3
C5
R2
(Rocp)
R3
C6
D7
2
3
4
5
6
7
R7
PC1
C7
R4
LC5540LF-DS

LC5547LF3054 Related Products

LC5547LF3054 LC5547LF3051 LC5547LF3052
Description Power Factor Controller, Power Factor Controller, Power Factor Controller,
Is it Rohs certified? conform to conform to conform to
Maker Allegro Allegro Allegro
Reach Compliance Code compliant compliant compliant
ECCN code EAR99 EAR99 EAR99
Analog Integrated Circuits - Other Types POWER FACTOR CONTROLLER POWER FACTOR CONTROLLER POWER FACTOR CONTROLLER
Theoretical principles of HFSS
Although HFSS is a very easy-to-use software, it is impossible to use it well if you are not familiar with the basic principles of its processing methods and the basic knowledge of microwaves. The att...
JasonYoo RF/Wirelessly
Several methods of maintaining data in S7-200
1. The CPU has a built-in supercapacitor to maintain data and always provide power during a power outage that is not too long, and no accessories are required. 2. A battery card is attached to the CPU...
eeleader Industrial Control Electronics
Where to next? Using an Op Amp as a Comparator—Is it Possible?
This link: [url=http://www.ti.com.cn/general/cn/docs/gencontent.tsp?contentId=159426]http://www.ti.com.cn/general/cn/docs/gencontent.tsp?contentId=159426[/url] Where is the next discussion?...
wangfuchong Analogue and Mixed Signal
AVR MCU Program Example
AVR MCU Program Example...
芝锐 Microchip MCU
UC_OS51 transplantation experience.
...
zjw50001 Embedded System
Have you ever used a multiplier?
I used the HA2556 analog multiplier to square a sine wave. Theoretically, I should get a double-frequency, equal-amplitude, positive half-cycle waveform, but the actual waveform is alternating between...
qiaoshibo05 Power technology

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1494  18  228  682  2513  31  1  5  14  51 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号