T0P244R View Datasheet(PDF) - Power Integrations, Inc
Part Name
Description
Manufacturer
T0P244R
Power Integrations, Inc
T0P244R Datasheet PDF : 52 Pages
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TOP242-250
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins
+
DC
Input
Voltage
D
L
CONTROL
C
CLXS F D
CS D
-
S
XF
PI-2617-050100
Figure 16. Three Terminal Operation (LINE-SENSE and
EXTERNAL CURRENT LIMIT Features Disabled.
FREQUENCY Pin Tied to SOURCE or CONTROL Pin).
+
DC
Input
Voltage
VUV = IUV x RLS
VOV = IOV x RLS
For RLS = 2 MΩ
RLS 2 MΩ VUV = 100 VDC
VOV = 450 VDC
DCMAX@100 VDC = 78%
DCMAX@375 VDC = 38%
D
L
CONTROL
C
-
S
PI-2618-081403
Figure 17. Line-Sensing for Under-Voltage, Overvoltage and Line
Feed-Forward.
+
DC
Input
Voltage
6.2 V
2 MΩ
VUV = RLS x IUV
For Value Shown
RLS VUV = 100 VDC
22 kΩ
D
M
CONTROL
C
-
S
PI-2510-040501
Figure 18. Line-Sensing for Under-Voltage Only (Overvoltage
Disabled).
+
DC
Input
Voltage
2 MΩ
VOV = IOV x RLS
For Values Shown
RLS
VOV = 450 VDC
30 kΩ
D
L
CONTROL
C
1N4148
-
S
PI-2620-040501
Figure 19. Linse-Sensing for Overvoltage Only (Under-Voltage
Disabled). Maximum Duty Cycle Reduced at Low Line
and Further Reduction with Increasing Line Voltage.
+
DC
Input
Voltage
For RIL = 12 kΩ
ILIMIT = 69%
For RIL = 25 kΩ
ILIMIT = 43%
See Figure 54b for
D
other resistor values
CONTROL
(RIL)
C
S
X
RIL
-
Figure 20. Externally Set Current Limit.
PI-2623-092303
+
RLS 2.5 MΩ
ILIMIT = 100% @ 100 VDC
ILIMIT = 63% @ 300 VDC
DC
Input
Voltage
D
CONTROL
C
S
X
RIL
-
6 kΩ
PI-2624-040501
Figure 21. Current Limit Reduction with Line Voltage.
15 M
12/04
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