TOP242-249 데이터 시트보기 (PDF) - Power Integrations, Inc
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TOP242-249
Power Integrations, Inc
TOP242-249 Datasheet PDF : 48 Pages
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TOP242-249
Pin Functional Description
DRAIN (D) Pin:
High voltage power MOSFET drain output. The internal start-
up bias current is drawn from this pin through a switched high-
voltage current source. Internal current limit sense point for
drain current.
CONTROL (C) Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. It is also used as the
connection point for the supply bypass and auto-restart/
compensation capacitor.
LINE-SENSE (L) Pin: (Y or R package only)
Input pin for OV, UV, line feed forward with DCMAX reduction,
remote ON/OFF and synchronization. A connection to SOURCE
pin disables all functions on this pin.
EXTERNAL CURRENT LIMIT (X) Pin: (Y or R package only)
Input pin for external current limit adjustment, remote
ON/OFF, and synchronization. A connection to SOURCE pin
disables all functions on this pin.
MULTI-FUNCTION (M) Pin: (P or G package only)
This pin combines the functions of the LINE-SENSE (L) and
EXTERNAL CURRENT LIMIT (X) pins of the Y package into
one pin. Input pin for OV, UV, line feed forward with DC
MAX
reduction, external current limit adjustment, remote ON/OFF
and synchronization. A connection to SOURCE pin disables all
functions on this pin and makes TOPSwitch-GX operate in
simple three terminal mode (like TOPSwitch-II).
FREQUENCY (F) Pin: (Y or R package only)
Input pin for selecting switching frequency: 132 kHz if
Y Package (TO-220-7C)
Tab Internally
Connected to
SOURCE Pin
P Package (DIP-8B)
G Package (SMD-8B)
7D
5F
4S
3X
2L
1C
R Package
(TO-263-7C)
M1
8S
S2
7S
S3
C4
5D
1234 5 7
C L X S F D PI-2724-033001
Figure 3. Pin Configuration (top view).
4
E
7/01
August 8, 2000
connected to SOURCE pin and 66 kHz if connected to
CONTROL pin. The switching frequency is internally set for
fixed 132 kHz operation in P and G packages.
SOURCE (S) Pin:
Output MOSFET source connection for high voltage power
return. Primary side control circuit common and reference point.
+
DC
Input
Voltage
-
VUV = IUV x RLS
VOV = IOV x RLS
RLS 2 MΩ For RLS = 2 MΩ
VUV = 100 VDC
VOV = 450 VDC
D
L
DCMAX@100 VDC = 78%
CONTROL DCMAX@375 VDC = 38%
C
S
X
For RIL = 12 kΩ
ILIMIT = 69%
RIL
12 kΩ
See fig. 55 for other
resistor values (RIL)
to select different ILIMIT
values PI-2629-040501
Figure 4. Y/R Package Line Sense and Externally Set Current
Limit.
+
DC
Input
Voltage
VUV = IUV x RLS
VOV = IOV x RLS
RLS
2 MΩ
For RLS = 2 MΩ
VUV = 100 VDC
VOV = 450 VDC
DCMAX@100 VDC = 78%
D
M
DCMAX@375 VDC = 38%
CONTROL
C
-
S
Figure 5. P/G Package Line Sense.
PI-2509-040501
+
DC
Input
Voltage
RIL
For RIL = 12 kΩ
ILIMIT = 69%
For RIL = 25 kΩ
ILIMIT = 43%
See fig. 55 for other
resistor values (RIL)
D
M
to select different
ILIMIT values
CONTROL
C
-
S
PI-2517-040501
Figure 6. P/G Package Externally Set Current Limit.
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