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參數(shù)資料
型號(hào): TOP250F
英文描述: SMPS Controller
中文描述: 開關(guān)電源控制器
文件頁數(shù): 18/52頁
文件大小: 457K
代理商: TOP250F
TOP242-250
18
H
9/02
Product Selector Guide 1
Data Sheets 2
Application Notes 3
Design Ideas 4
Design Tools 5
Quality and Reliability 6
Package Information 7
DPA-SwitchDC-DC Seminar 8
LinkSwitch & TinySwitch-IIAC-DC Seminar 9
TOPSwitch-GXAC-DC Seminar 10
Sales Representatives and Distributors 11
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont.)
Figure 28. Line-Sensing and Externally Set Current Limit.
PI-2640-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
ON/OFF
47 k
Q
can be an optocoupler
output or can be replaced by
a manual switch.
300 k
Q
R
X
PI-2629-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
R
IL
12 k
R
LS
2 M
V
UV
= I
UV
x R
LS
V
OV
=
I
OV
x
R
LS
For R
LS
= 2 M
V
UV
= 100 VDC
V
OV
= 450 VDC
DC
MAX
@100 VDC = 78%
DC
MAX
@375 VDC = 38%
For R
IL
= 12 k
I
LIMIT
= 69%
See fig. 55 for other
resistor values (R
IL
)
to select different I
LIMIT
values
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