TOP242-249 POWERINT [Power Integrations, Inc.], TOP242-249 Datasheet - Page 19

• Manufacturer Part Number: TOP242-249
• Description: Family Extended Power, Design Flexible,Integrated Off-line Switcher
• Manufacturer: POWERINT [Power Integrations, Inc.]

Figure 32. Line Sensing for Under-Voltage Only (Overvoltage
Figure 30. Three Terminal Operation (MULTI-FUNCTION
Figure 34. Externally Set Current Limit.
Typical Uses of MULTI-FUNCTION (M) Pin
Voltage
Voltage
Voltage
Input
Input
Input
DC
DC
DC
+
+
+
Disabled).
-
Features Disabled).
-
-
6.2 V
R
IL
D
S
D
S
D
S
CONTROL
CONTROL
CONTROL
M
M
M
2 MΩ
22 kΩ
C
C
C
R
LS
For R
For R
See fig. 55 for other
resistor values (R
to select different
I
LIMIT
C
For Value Shown
I
I
D
V
V
C
D
LIMIT
LIMIT
values
IL
IL
UV
UV
= 25 kΩ
= 12 kΩ
S
= R
= 100 VDC
= 69%
= 43%
PI-2510-040501
PI-2517-040501
PI-2508-081199
S
S
LS
x I
M
S
IL
UV
)
S
Figure 31. Line Sensing for Undervoltage, Over-Voltage and
Figure 33. Line Sensing for Overvoltage Only (Under-Voltage
Figure 35. Current Limit Reduction with Line Voltage.
Voltage
Voltage
Voltage
Input
Input
Input
DC
DC
DC
+
+
+
Disabled). Maximum Duty Cycle will be reduced at
Low Line.
-
Line Feed Forward.
-
-
R
R
LS
IL
6 kΩ
2.5 MΩ
R
LS
D
D
S
S
August 8, 2000
30 kΩ
2 MΩ
D
S
R
CONTROL
CONTROL
LS
CONTROL
M
M
2 MΩ
M
I
I
LIMIT
LIMIT
C
C
TOP242-249
For R
DC
DC
C
=
=
V
V
V
V
1N4148
UV
OV
UV
OV
MAX
MAX
100% @ 100 VDC
63% @ 300 VDC
For Values Shown
LS
V
V
= I
= I
= 100 VDC
= 450 VDC
@100 VDC = 78%
@375 VDC = 38%
OV
OV
= 2 MΩ
OV
UV
= 450 VDC
= I
x R
x R
PI-2509-040501
PI-2516-040501
PI-2518-040501
OV
7/01
LS
LS
E
x R
LS
19