參數(shù)資料
型號(hào): TOP245P
英文描述: Up to 290 W Extended power. design flexible.
中文描述: 高達(dá)290瓦的擴(kuò)展能力。設(shè)計(jì)靈活。
文件頁數(shù): 15/52頁
文件大?。?/td> 468K
代理商: TOP245P
TOP242-250
15
K
9/03
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins
X
F
PI-2617-050100
DC
Input
Voltage
+
-
D
C S
D
S
C
CONTROL
L
C L X S F
D
PI-2618-081403
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
2 M
R
LS
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%
PI-2510-040501
DC
Input
Voltage
+
-
D
M
S
C
V
UV
= R
LS
x I
UV
For Value Shown
V
UV
= 100 VDC
R
LS
6.2 V
2 M
22 k
CONTROL
PI-2620-040501
DC
Input
Voltage
+
-
D
S
C
CONTROL
L
2 M
30 k
R
LS
1N4148
V
OV
= I
OV
x
R
LS
For Values Shown
V
OV
= 450 VDC
X
PI-2624-040501
DC
Input
Voltage
+
-
D
S
C
2.5 M
R
LS
6 k
R
IL
100% @ 100 VDC
63% @ 300 VDC
I
LIMIT
=
I
LIMIT
=
CONTROL
Figure 16. Three Terminal Operation (LINE-SENSE and
EXTERNAL CURRENT LIMIT Features Disabled.
FREQUENCY Pin Tied to SOURCE or CONTROL Pin).
Figure 17. Line-Sensing for Under-Voltage, Overvoltage and
Line Feed-Forward.
Figure 18. Line-Sensing for Under-Voltage Only (Overvoltage
Disabled).
Figure 19. Line-Sensing for Overvoltage Only (Under-Voltage
Disabled). Maximum Duty Cycle Reduced at Low Line
and Further Reduction with Increasing Line Voltage.
Figure 20. Externally Set Current Limit.
Figure 21. Current Limit Reduction with Line Voltage.
X
PI-2623-092303
DC
Input
Voltage
+
-
D
S
C
R
IL
For R
IL
= 12 k
I
LIMIT
= 69%
See Figure 54b for
other resistor values
(R
IL
)
For R
IL
= 25 k
I
LIMIT
= 43%
CONTROL
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