TOP252-262 Datasheet, PDF (16/48 Pages) Power Integrations, Inc. – Enhanced EcoSmart, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range

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 SSS 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
V_UV = I_UV × R_LS + V_V (I_V = I_UV)
V_OV = I_OV × R_LS + V_V (I_V = I_OV)
For R_LS = 4 M7
R_LS 4 M7
V_UV = 102.8 VDC
V_OV = 451 VDC
DC_MAX@100 VDC = 76%
DC_MAX@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 k7}
V_UV = I_UV × R_LS + V_V (I_V = I_UV)
V_OV = I_OV × R_LS + V_V (I_V = I_OV)
For R_LS = 4 M7
R_LS 4 M7
V_UV = 102.8 VDC
V_OV = 451 VDC
Sense Output Voltage
DC_MAX @ 100 VDC = 76%
D
V
DC_MAX @ 375 VDC = 41%
CONTROL
Q_R
C
-
S
PI-4756-121007
Figure 18. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Latched Output Overvoltage Protection.
+
DC
Input
Voltage
V_UV = I_UV × R_LS + V_V (I_V = I_UV)
V_OV = I_OV × R_LS + V_V (I_V = I_OV)
For R_LS = 4 M7
V_UV = 102.8 VDC
V_OV = 451 VDC
R_LS 4 M7
Sense Output Voltage
VR_OVP
R_OVP
DC_MAX @ 100 VDC = 76%
DC_MAX @ 375 VDC = 41%
D
V
CONTROL
C
R_OVP >3k7
-
S
PI-4719-120307
Figure 19. Line-Sensing for Undervoltage, Overvoltage, Line Feed-Forward and
Hysteretic Output Overvoltage Protection.
16
Rev. F 01/09
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