參數(shù)資料
型號： L4990D
廠商： 意法半導體
英文描述： PRIMARY CONTROLLER
中文描述： 主控制器
文件頁數(shù)： 3/24頁
文件大?。?/td> 322K
代理商： L4990D
ELECTRICALCHARACTERISTICS
(V
CC
= 15V; T
j
= 0 to 70
°
C; unless otherwise specified.)
Symbol
REFERENCE SECTION
V
O
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Variation
Short Circuit Current
Power Down/UVLO
T
j
= 25
°
C; I
O
= 1mA
V
CC
= 12 to 20V
I
O
= 1 to 20mA
4.925
5.0
2.0
5.0
0.4
5.0
5.075
15
20
V
mV
mV
mV/
°
C
V
mA
V
T
S
Line, Load, Temperature
Vref = 0V
V
CC
= 8.5V; I
sink
= 0.5mA
4.875
30
5.125
150
0.5
I
OS
0.2
OSCILLATOR SECTION
Initial Accuracy
T
j
= 25
°
C; R
T
= 4.42k
;
C
T
= 1nF; pin 15 Vref
R
T
= 4.42K
; V
CC
= 12 to 20V;
C
T
= 1nF; pin 15 = Vref
T
j
= 25
°
C; R
T
= 4.42K
;
C
T
= 1nF; pin 15 OPEN
R
T
= 4.42K
; V
CC
= 12 to 20V;
C
T
= 1nF; pin 15 OPEN
pin 3 = 0,7V, pin 15 = Vref
pin 3 = 0.7V, pin 15 = OPEN
R
T
= 4.42k
C
T
= 1nF
pin 3 = 3.2V, pin 15 = Vref
pin 3 = 3.2V, pin 15 = OPEN
pin 3 = 2.02V, pin 15 = OPEN
285
300
315
kHz
Accuracy
279
300
321
kHz
Initial Accuracy
280
295
310
kHz
Accuracy
275
295
315
kHz
Duty Cycle
0
0
%
%
Duty Cycle
45
90
37
%
%
%
V
V
Duty Cycle Accuracy
Oscillator Ramp Peak
Oscillator Ramp Valley
40
3.0
1.0
43
ERROR AMPLIFIER SECTION
Input Bias Current
V
I
Input Voltage
G
OPL
Open Loop Gain
SVR
Supply Voltage Rejection
V
OL
Output Low Voltage
V
OH
Output High Voltage
I
O
Output Source Current
Output Sink Current
Unit Gain Bandwidth
S
R
Slew Rate
PWM CURRENT SENSE SECTION
I
b
Input Bias Current
I
S
Maximum Input Signal
Delay to Output
Gain
SOFT START
I
SSC
SS Charge Current
I
SSD
SS Discharge Current
V
SSSAT
SS Saturation Voltage
V
SSCLAMP
SS Clamp Voltage
LEADING EDGE BLANKING
Internal Masking Time
V
FB
to GND
V
COMP
= V
FB
V
COMP
= 2to 4V
V
CC
= 12 to 20V
I
sink
= 2mA, V
FB
= 2.7V
I
source
= 0.5mA, V
FB
= 2.3V
V
COMP
> 4V,V
FB
= 2.3V
V
COMP
= 1.1V,V
FB
= 2.7V
0.2
2.5
90
85
1.0
2.58
μ
A
V
dB
dB
V
V
mA
mA
MHz
V/
μ
s
2.42
60
1.1
5
6
0.5
2
2
1.3
6
4
8
I
sen
= 0
V
COMP
= 5V
3
15
1.08
μ
A
V
ns
V/V
0.92
1.0
100
3
2.85
3.15
14
20
200
26
μ
A
μ
A
V
V
VSS = 0.6V
DC = 0%
0.6
7
100
ns
L4990 - L4990A
3/24
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