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