TOP252 Ver la hoja de datos (PDF) - Power Integrations, Inc
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TOP252 Datasheet PDF : 50 Pages
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TOP252-262
Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins
TOP252-258M TOP254-258Y
+
D
CX V
DC
Input
Voltage
S S SS S
VXCS F D
D
D
V
CONTROL
C
SC
C SD
-
S
XF
PI-4716-020508
Figure 16a. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL
CURRENT LIMIT Features Disabled. FREQUENCY Pin Tied to
SOURCE or CONTROL Pin) for TOP254-258 Y Packages.
+
TOP259-261Y
DC
Input
Voltage
D
V
CONTROL
C
VXCSG D
CS D
-
S
XG
PI-4984-020708
Figure 16b. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL
CURRENT LIMIT Features Disabled for TOP259-261 Y Packages.
+
eSIP L Package eSIP E Package
DC
Input
Voltage
VXC FS D
C SD
D
V
CONTROL
C
VXC FS D
C SD
-
S
XF
PI-4956-071708
Figure 16c. Three Terminal Operation (VOLTAGE MONITOR and EXTERNAL
CURRENT LIMIT Features Disabled. FREQUENCY Pin Tied to
SOURCE or CONTROL Pin) for TOP252-262 L and E Packages.
+
DC
Input
Voltage
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
DCMAX@100 VDC = 76%
DCMAX@375 VDC = 41%
D
V
CONTROL
C
-
S
PI-4717-120307
Figure 17. Line-Sensing for Undervoltage, Overvoltage and Line Feed-Forward.
+
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 18. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Latched Output Overvoltage Protection.
+
DC
Input
Voltage
VUV = IUV × RLS + VV (IV = IUV)
VOV = IOV × RLS + VV (IV = IOV)
For RLS = 4 MΩ
VUV = 102.8 VDC
VOV = 451 VDC
RLS 4 MΩ
Sense Output Voltage
VROVP
ROVP
DCMAX @ 100 VDC = 76%
DCMAX @ 375 VDC = 41%
D
V
CONTROL
C
ROVP >3kΩ
-
S
PI-4719-120307
Figure 19. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Hysteretic Output Overvoltage Protection.
16
Rev. H 06/13
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