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參數(shù)資料
| 型號： | S3843P |
| 廠商： | AUK Corp |
| 英文描述： | Current Mode PWM Controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大小： | 300K |
| 代理商： | S3843P |
KSI-L007-000
3
S3843P
Electrical Characteristics(continued)
(Vcc=15V, Rt=10Kohm, Ct=3.3nF, Ta=0
℃
to 70
℃
, Unless otherwise specified)
Characteristic
Symbol
5. Output Section
Test Condition
Min.
Typ. Max.
Unit
Output Low Level1
V
OL1
Isink=20mA
-
0.1
0.4
V
Output Low Level2
V
OL2
Isink=200mA
-
1.5
2.0
V
Output High Level1
V
OH1
Isource=20mA
13.0
13.5
-
V
Output High Level2
V
OH2
Isource=200mA
12.0
13.5
-
V
V
OL
(UVLO)
-
V
CC
=6V, I
sink
= 1mA
Tj=25
°
C
,
C
1
=1nF
Tj=25
°
C
,
C
1
=1nF
-
0.7
1.2
V
Rise Time
t
r
-
50
150
nS
Fall Time
t
f
-
50
150
nS
6. Under Voltage Lockout Section
Start Threshold
V
th
-
7.8
8.4
9
V
Min. Operating Voltage
V
tL
After turn on
7
7.6
8.2
V
7. PWM Section
Maximum Duty Cycle
D
max
-
93
97
100
%
Minimum Duty Cycle
D
min
-
-
-
0
%
8.Total Standby Section
Start-Up Current
I
st
-
-
0.5
1
mA
Operating Supply Current
I
CC
V
pin2
=V
pin3
=0V
-
11
20
mA
V
CC
Zener Voltage
V
Z
I
CC
=25mA
-
35
-
V
NOTE: Adjust Vcc above the start threshold before setting at 15V
Block Diagram
1
2
3
4
8
7
5
7
6
5
-
+
Bias
Internal
V ref
5V
Reset
Set/
LOGIC
Oscillator
1V
LATCH
R
S
1/3
35V
1/2 V ref
Error Amp
UV LO
C.S Comp
PWM
Vref
Vcc
Vfb
Com
C.S
Rt/Ct
GND
PWR Vc
Output
PWR GND
T
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