TOP252 Ver la hoja de datos (PDF) - Power Integrations, Inc
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componentes Descripción
Fabricante
TOP252 Datasheet PDF : 50 Pages
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TOP252-262
Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins (cont.)
+
DC
Input
Voltage
TOP259-261YN would
use the G pin as the
return for QR.
-
VUV = IUV × RLS + VV (IV = IUV)
VOV = IOV × RLS + VV (IV = IoV)
RLS
4 MΩ
DCMAX@100 VDC = 76%
DCMAX@375 VDC = 41%
QR can be an optocoupler
D
V
output or can be replaced
by a manual switch.
CONTROL
C
For RIL = 12 kΩ
ILIMIT = 61%
S
X
RIL QR
ON/OFF
16 kΩ
PI-4725-011008
Figure 26. Active-on Remote ON/OFF with Line-Sense and External
Current Limit.
+
DC
Input
Voltage
TOP259-261YN would
use the G pin as the
return for RIL.
-
VUV = IUV x RLS + VV (IV = IUV)
VOV = IOV x RLS + VV (IV = IoV)
RLS
4 MΩ
For RLS = 4 MΩ
VUV = 102.8 VDC
VOV = 451 VDC
D
V
DCMAX @ 100 VDC = 76%
DCMAX @ 375 VDC = 41%
CONTROL
C
S
X
For RIL = 12 kΩ
ILIMIT = 61%
RIL
12 kΩ
See Figure 55b for
other resistor values
(RIL) to select different
ILIMIT values.
Figure 27. Line Sensing and Externally Set Current Limit.
+
DC
Input
Voltage
Reset 10 kΩ
VUV = IUV × RLS + VV (IV = IUV)
VOV = IOV × RLS + VV (IV = IOV)
For RLS = 4 MΩ
RLS 4 MΩ
VUV = 102.8 VDC
VOV = 451 VDC
Sense Output Voltage
D
QR
DCMAX @ 100 VDC = 76%
V
DCMAX @ 375 VDC = 41%
CONTROL
C
-
S
PI-4756-121007
Figure 28. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Latched Output Overvoltage Protection with Device Reset.
Typical Uses of MULTI-FUNCTION (M) Pin
+
DC
Input
Voltage
D
C
M
SS SS
D
M
D
CONTROL
C
SC
-
S
PI-4727-061207
Figure 29. Three Terminal Operation (MULTI-FUNCTION Features Disabled).
+
DC
Input
Voltage
VUV = IUV × RLS + VM (IM = IUV)
VOV = IOV × RLS + VM (IM = IOV)
For RLS = 4 MΩ
RLS 4 MΩ VUV = 102.8 VDC
VOV = 451 VDC
DCMAX @ 100 VDC = 76%
DCMAX @ 375 VDC = 41%
D
M
CONTROL
C
-
S
PI-4728-120307
Figure 30. Line Sensing for Undervoltage, Overvoltage and Line Feed-Forward.
18
Rev. H 06/13
www.powerint.com
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