top233 Power Integrations, Inc., top233 Datasheet - Page 12

• Manufacturer Part Number: top233
• Description: Design Flexible, Ecosmart , Integrated Off-line Switcher
• Manufacturer: Power Integrations, Inc.

Figure 13. Three Terminal Operation (MULTI-FUNCTION
Figure 17. Externally Set Current Limit.
Typical Uses of MULTI-FUNCTION (M) Pin
Figure 15. Line Sensing for Under-Voltage Only (Overvoltage
12
TOP232-234
Voltage
Voltage
Voltage
Input
Input
Input
B
7/01
DC
DC
DC
+
+
+
-
-
-
Features Disabled. FREQUENCY Pin Tied to SOURCE
or CONTROL Pin).
Disabled).
6.2 V
R
IL
D
S
D
S
D
S
CONTROL
CONTROL
CONTROL
M
M
M
2 MΩ
22 kΩ
For R
See graph for other
resistor values (R
For R
C
C
C
R
LS
I
I
LIMIT
LIMIT
IL
IL
For Value Shown
= 12 kΩ
= 25 kΩ
V
V
= 40%
= 67%
UV
UV
= R
= 100 VDC
PI-2510-040401
PI-2508-081199
PI-2517-040401
LS
IL
)
x I
UV
Figure 14. Line Sensing for Under-Voltage, Overvoltage and
Figure 16. Line Sensing for Overvoltage Only (Under-Voltage
Figure 18. Current Limit Reduction with Line Voltage.
Voltage
Voltage
Voltage
Input
Input
Input
DC
DC
DC
+
+
+
-
-
Maximum Duty Cycle Reduction.
-
Disabled).
R
R
LS
IL
6 kΩ
2.5 MΩ
R
LS
D
D
S
S
30 kΩ
2 MΩ
D
S
R
CONTROL
CONTROL
LS
CONTROL
M
M
2 MΩ
M
I
I
C
C
LIMIT
LIMIT
For R
DC
DC
C
V
V
V
V
IN4148
MAX
MAX
=
=
UV
OV
UV
OV
For Values Shown
90% @ 100 VDC
55% @ 300 VDC
LS
V
V
= I
= 450 VDC
= I
= 100 VDC
@100 VDC = 78%
@375 VDC = 47%
OV
OV
= 2 MΩ
OV
UV
= 450 VDC
= I
x R
x R
PI-2518-040401
PI-2509-040401
PI-2516-040401
OV
LS
LS
x R
LS