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參數(shù)資料
| 型號(hào)： | S3842 |
| 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(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 351K |
| 代理商： | S3842 |
KSI-8006-003
4
S3842
Electrical Characteristics(continued)
Characteristic
6. Under-Voltage Lockout Section
Symbol
Test Condition
Min.
Typ. Max.
Unit
Start Threshold
Min. Operation Voltage
After Turn-On
7. PWM Section
V
th
V
PIN7
where
V
PIN8
≥
4.9V
14.5
16.0
17.5
V
V
CC(min)
V
PIN7
where
V
PIN8
≤
1V
8.5
10.0
11.5
V
Maximum Duty Cycle
DC
max
-
93
97
100
ns
8. Total Standby Section
Start-Up Current
I
st
V
CC
= 15V before turn on
V
PIN2
=
V
PIN3
=0V
-
0.4
0.7
mA
Operating Supply Current
I
CC
-
11
20
mA
Zener Voltage
V
Z
I
CC
=25mA
-
36
-
V
NOTE: 1.Thes parameters, although guaranteed.are not 100% tested in production
2.Parameter measured at trip piont of latch with V
pin2
= 0
3.Gain defined as : A =
△
V
PIN1
/
△
V
PIN3
; 0
≤
V
PIN3
≤
0.8V
4.Adjust V
CC
above the start threshold before setting at 15V
Information in Using IC
1. Under voltage Lockout
To prevent erratic output behavior which activating
the power switch with extraneous leakage currents,
during under voltage lockout. Output(pin6) should be
shunted to ground with a bleeder resister.
The Vcc comparator upper and lower threshold are
16V/10V. The large hysteresis and low start up
currents makes it ideally suited in off-line converter
application where efficient bootstrap start-up
<17mA
<17mA
techniques are required.
T O R ES ET O F IC
O N/O F F C O M M A ND
V c c
V o ff-10V
V o n -16V
7
Vcc
Icc
<1mA
10V
16V
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