T0P243G
| Model | T0P243G |
| Description | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| PDF file | Total 48 pages (File size: 769K) |
| Chip Manufacturer | POWERINT |
TOP242-249
Typical Uses of MULTI-FUNCTION (M) Pin
+
C
S
S
M
+
V
UV
= I
UV
x R
LS
V
OV
= I
OV
x R
LS
R
LS
2 MΩ
DC
Input
Voltage
D
M
CONTROL
C
D
S
S
DC
Input
Voltage
S
For R
LS
= 2 MΩ
V
UV
= 100 VDC
V
OV
= 450 VDC
DC
MAX
@100 VDC = 78%
DC
MAX
@375 VDC = 38%
C
D
D
M
CONTROL
C
S
PI-2508-081199
-
-
S
PI-2509-040501
Figure 30. Three Terminal Operation (MULTI-FUNCTION
Features Disabled).
Figure 31. Line Sensing for Undervoltage, Over-Voltage and
Line Feed Forward.
+
2 MΩ
+
V
UV
= R
LS
x I
UV
R
LS
2 MΩ
R
LS
V
OV
= I
OV
x R
LS
For Values Shown
V
OV
= 450 VDC
For Value Shown
V
UV
= 100 VDC
DC
Input
Voltage
D
6.2 V
22 kΩ
M
CONTROL
DC
Input
Voltage
D
C
30 kΩ
1N4148
M
CONTROL
C
S
PI-2516-040501
-
S
PI-2510-040501
-
Figure 32. Line Sensing for Under-Voltage Only (Overvoltage
Disabled).
Figure 33. Line Sensing for Overvoltage Only (Under-Voltage
Disabled). Maximum Duty Cycle will be reduced at
Low Line.
+
+
For R
IL
= 12 kΩ
I
LIMIT
= 69%
For R
IL
= 25 kΩ
I
LIMIT
= 43%
R
LS
2.5 MΩ
I
LIMIT
= 100% @ 100 VDC
I
LIMIT
= 63% @ 300 VDC
DC
Input
Voltage
D
M
CONTROL
See fig. 55 for other
resistor values (R
IL
)
to select different
I
LIMIT
values
C
DC
Input
Voltage
D
M
CONTROL
R
IL
R
IL
6 kΩ
C
S
PI-2518-040501
-
S
PI-2517-040501
-
Figure 34. Externally Set Current Limit.
Figure 35. Current Limit Reduction with Line Voltage.
August 8, 2000
E
7/01
19
