參數(shù)資料
型號： L4981XD
廠商： 意法半導體
元件分類： 基準電壓源/電流源
英文描述： POWER FACTOR CORRECTOR
中文描述： 功率因數(shù)校正
文件頁數(shù)： 4/17頁
文件大小： 228K
代理商： L4981XD
ELECTRICALCHARACTERISTICS
(Unlessotherwise specifiedV
CC
= 18V,C
OSC
= 1nF,
R
OSC
= 24K
, C
SS
= 1
μ
F, V
CA-OUT
= 3.5V,V
ISENSE
= 0V, V
LFF
= V
REF
, I
AC
= 100
μ
A, V
RMS
= 1V,
V
FEED
= GND, V
IPK
= 1V,V
OVP
= 1V, T
J
= 25
°
C
Symbol
ERROR AMPLIFIER SECTION
V
IO
Input Offset Voltage
I
IB
Input Bias Current
Open Loop Gain
V
13H
Output High voltage
Prameter
Test Condition
Min.
Typ.
Max.
Unit
–25
°
C < T
J
< 85
°
C
V
FEED
= 0V
±
8
500
mV
nA
dB
V
-500
70
5.5
-50
100
6.5
V
FEED
= 4.7V
I
VA-OUT
= -0.5mA
V
FEED
= 5.5V
I
VA-OUT
= 0.5mA
V
FEED
= 4.7V; V
VA-OUT
= 3.5V
V
FEED
= 5.5V; V
VA-OUT
= 3.5V
7.5
V
13L
Output Low Voltage
0.4
1
V
-I
13
I
13
Output Source Current
Output Sink Current
2
4
10
20
mA
mA
REFERENCE SECTION
V
ref
Reference OutputVoltage
–25
°
C < T
J
< 85
°
C
T
j
= 25
°
C I
ref
= 0
1mA
≤
I
ref
≤
10mA
–25
°
C < T
J
< 85
°
C
12V
≤
V
CC
≤
19V
–25
°
C < T
J
< 85
°
C
V
ref
= 0V
4.97
5.01
5.1
5.1
3
5.23
5.19
15
V
V
V
ref
Load Regulation
mV
V
ref
Line Regulation
3
10
mV
I
ref sc
Short Circuit Current
20
30
50
mA
OSCILLATOR SECTION
f
osc
Initial Accuracy
Frequency Stability
T
j
= 25
°
C
12V
≤
V
CC
≤
19V
–25
°
C < T
J
< 85
°
C
85
80
100
100
115
120
KHz
KHz
V
svp
I
18C
I
18D
V
18
Ramp Valley to Peak
Charge Current
Discharge Current
Ramp Valley Voltage
4.7
0.45
5
5.3
0.65
V
V
COSC
= 3.5V
V
COSC
= 3.5V
0.55
11.5
1.15
mA
mA
V
0.9
1.4
SYNC SECTION
(Only for
L4981A
)
t
W
Output Pulse Width
I
16
Sink Current with Low Output
Voltage
-I
16
Source Current with High Output
Voltage
V
16L
Low Input Voltage
V
16H
High Input Voltage
t
d
Pulse for Synchronization
FREQUENCY MODULATION FUNCTION
(Only for
L4981B
)
f
18max
Maximum Oscillation Frequency
f
18min
Minimum Oscillator Frequency
50% Amplitude
V
SYNC
= 0.4V
V
COSC
= 0V
V
SYNC
= 4.5V
V
COSC
= 6.7V
0.3
0.4
0.8
0.8
μ
s
mA
1
6
mA
0.9
V
V
ns
3.5
800
V
FREQ-MOD
= 0V (Pin 16) I
freq
= 0
I
FREQ-MOD
= 360
μ
A (Pin16)
V
VRMS
= 4V (Pin 7)
I
FREQ-MOD
= 180
μ
A (Pin16)
V
VRMS
= 2V (Pin 7)
85
100
74
115
KHz
KHz
76
KHz
SOFT START SECTION
I
SS
V
12sat
Soft Start Source Current
Output Saturation Voltage
V
SS
= 3V
V
3
= 6V, I
SS
= 2mA
60
100
0.1
140
0.25
μ
A
V
L4981A - L4981B
4/17
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