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參數(shù)資料
| 型號(hào)： | LC5523FLF3051 |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | POWER FACTOR CONTROLLER, 18 kHz SWITCHING FREQ-MAX, ZFM7 |
| 封裝： | ROHS COMPLIANT, TO-220F, 7 PIN |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大?。?/td> | 468K |
| 代理商： | LC5523FLF3051 |
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LC5523F
Description
The LC5500 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 LC5523F is intended for isolated designs. The incor-
porated MOSFET has a VDSS(min) rating of 650 V and
RDS(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
supply 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.
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
output diode)
Integrated bias assist circuit (improves the startup
performance, suppresses VCC 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): pins VCC, OVP, and
OCP, intermittent oscillation operation
Overload protection (OLP): intermittent oscillation
operation
Thermal shutdown (TSD): halts switching operation and
latches in the off-state
Single-Stage Power Factor Corrected
Off-Line Switching Regulator IC
Typical Application
Package: 7-pin TO-220F
VCC
S/GND
FB
OVP
Controller
Chip
D/ST
LC5523F
2
5
6
7
4
1
OCP
PC1
PC2
V
IN (AC)
LED
PC2
PC1
+
–
Not to scale
LF 3052
LF 3054
LF 3051
48102.004
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