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L4981X 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 L4981X은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 L4981X 자료 제공

부품번호 L4981X 기능
기능 POWER FACTOR CORRECTOR
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


L4981X 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



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L4981X 데이터시트, 핀배열, 회로
L4981A
® L4981B
POWER FACTOR CORRECTOR
CONTROL BOOST PWM UP TO 0.99P.F.
LIMIT LINE CURRENT DISTORTION TO < 5%
UNIVERSAL INPUT MAINS
FEED FORWARD LINE AND LOAD REGULA-
TION
AVERAGE CURRENT MODE PWM FOR
MINIMUM NOISE SENSITIVITY
HIGH CURRENT BIPOLAR AND DMOS TO-
TEM POLE OUTPUT
LOW START-UP CURRENT (0.3mA TYP.)
UNDER VOLTAGE LOCKOUT WITH HYS-
TERESIS AND PROGRAMMABLE TURN ON
THRESHOLD
OVERVOLTAGE, OVERCURRENT PROTEC-
TION
PRECISE 2% ON CHIP REFERENCE EX-
TERNALLY AVAILABLE
SOFT START
DESCRIPTION
The L4981 I.C. provides the necessary features
to achieve a very high power factor up to 0.99.
Realized in BCD 60II technology this power factor
corrector (PFC) pre-regulator contains all the con-
BLOCK DIAGRAM
MULTIPOWER BCD TECHNOLOGY
DIP20
SO20
ORDERING NUMBERS: L4981X (DIP20)
L4981XD (SO20)
trol functions for designing a high efficiency-mode
power supply with sinusoidal line current con-
sumption.
The L4981 can be easily used in systems with
mains voltages between 85V to 265V without any
line switch. This new PFC offers the possibility to
work at fixed frequency (L4981A) or modulated
frequency (L4981B) optimizing the size of the in-
September 1998
1/17




L4981X pdf, 반도체, 판매, 대치품
L4981A - L4981B
ELECTRICAL CHARACTERISTICS (Unless otherwise specified VCC = 18V, COSC = 1nF,
ROSC = 24K, CSS = 1µF, VCA-OUT = 3.5V, VISENSE = 0V, VLFF = VREF, IAC = 100µA, VRMS = 1V,
VFEED = GND, VIPK = 1V, VOVP = 1V, TJ = 25°C
Symbol
Prameter
Test Condition
ERROR AMPLIFIER SECTION
VIO Input Offset Voltage
IIB Input Bias Current
–25°C < TJ < 85°C
VFEED = 0V
Open Loop Gain
V13H
Output High voltage
VFEED = 4.7V
IVA-OUT = -0.5mA
V13L Output Low Voltage
-I13 Output Source Current
VFEED = 5.5V
IVA-OUT = 0.5mA
VFEED = 4.7V; VVA-OUT = 3.5V
I13 Output Sink Current
VFEED = 5.5V; VVA-OUT = 3.5V
REFERENCE SECTION
Vref
Vref
Vref
Iref sc
Reference Output Voltage
Load Regulation
Line Regulation
Short Circuit Current
–25°C < TJ < 85°C
Tj = 25°C Iref = 0
1mA Iref 10mA
–25°C < TJ < 85°C
12V VCC 19V
–25°C < TJ < 85°C
Vref = 0V
OSCILLATOR SECTION
fosc Initial Accuracy
Frequency Stability
Vsvp Ramp Valley to Peak
Tj = 25°C
12V VCC 19V
–25°C < TJ < 85°C
I18C Charge Current
I18D Discharge Current
VCOSC = 3.5V
VCOSC = 3.5V
V18 Ramp Valley Voltage
SYNC SECTION (Only for L4981A)
tW Output Pulse Width
50% Amplitude
I16 Sink Current with Low Output VSYNC = 0.4V
Voltage
VCOSC = 0V
-I16 Source Current with High Output VSYNC = 4.5V
Voltage
VCOSC = 6.7V
V16L
V16H
Low Input Voltage
High Input Voltage
td Pulse for Synchronization
FREQUENCY MODULATION FUNCTION (Only for L4981B)
f1 8max
f18min
Maximum Oscillation Frequency
Minimum Oscillator Frequency
VFREQ-MOD = 0V (Pin 16) Ifreq = 0
IFREQ-MOD = 360µA (Pin 16)
VVRMS = 4V (Pin 7)
IFREQ-MOD = 180µA (Pin 16)
VVRMS = 2V (Pin 7)
SOFT START SECTION
ISS Soft Start Source Current
VSS = 3V
V12sat
Output Saturation Voltage
V3 = 6V, ISS = 2mA
Min.
-500
70
5.5
2
4
4.97
5.01
20
85
80
4.7
0.45
0.9
0.3
0.4
1
3.5
800
85
60
Typ.
-50
100
6.5
0.4
10
20
5.1
5.1
3
3
30
100
100
5
0.55
11.5
1.15
0.8
0.8
6
100
74
76
100
0.1
Max.
±8
500
7.5
1
5.23
5.19
15
10
50
115
120
5.3
0.65
1.4
0.9
115
140
0.25
Unit
mV
nA
dB
V
V
mA
mA
V
V
mV
mV
mA
KHz
KHz
V
mA
mA
V
µs
mA
mA
V
V
ns
KHz
KHz
KHz
µA
V
4/17

4페이지










L4981X 전자부품, 판매, 대치품
Figure 3: MULTI-OUT vs. IAC (VRMS = 4.4V;
VLFFD = 5.1V)
L4981A - L4981B
Figure 4: MULTI-OUT vs. IAC (VRMS = 5.3V;
VLFFD = 5.1V)
Figure 5: MULTI-OUT vs. IAC (VRMS = 1.7V;
VLFFD = 2.5V)
Figure 6: MULTI-OUT vs. IAC (VRMS = 2.2V;
VLFFD = 2.5V)
Figure 7: MULTI-OUT vs. IAC (VRMS = 4.4V;
VLFFD = 2.5V)
Figure 8: MULTI-OUT vs. IAC (VRMS = 5.3V;
VLFFD = 2.5V)
7/17

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