TOP242R POWERINT [Power Integrations, Inc.], TOP242R Datasheet - Page 4

• Manufacturer Part Number: TOP242R
• Description: TOPSwitch -GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
• Manufacturer: POWERINT [Power Integrations, Inc.]

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 inter-
nal 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, R or F package only)
Input pin for OV, UV, line feed forward with DC
remote ON/OFF and synchronization. A connection to
SOURCE pin disables all functions on this pin.
EXTERNAL CURRENT LIMIT (X) Pin: (Y, R or F
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
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).
Figure 3. Pin Configuration (top view).
4
TOP242-250
M
C
S
S
MAX
G Package (SMD-8B)
P Package (DIP-8B)
Connected to
Tab Internally
SOURCE Pin
reduction, external current limit adjustment, remote
G
1/02
3
4
2
1
Y Package (TO-220-7C)
8
7
5
S
D
S
R Package (TO-263-7C)
F Package (TO-262-7C)
C L X S F
1 2 3 4 5
MAX
D
7
PI-2724-010802
reduction,
7 D
5 F
4 S
3 X
2 L
1 C
FREQUENCY (F) Pin: (Y, R or F package only)
Input pin for selecting switching frequency: 132 kHz if
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.
Figure 4. Y/R/F Package Line Sense and Externally Set Current
Figure 5. P/G Package Line Sense.
Figure 6. P/G Package Externally Set Current Limit.
Voltage
Voltage
Voltage
Input
Input
Input
DC
DC
DC
Limit.
+
+
+
-
-
-
R
IL
D
S
D
D
S
S
R
R
CONTROL
CONTROL
CONTROL
LS
LS
X
12 k
R
M
M
L
2 M
IL
2 M
C
C
C
For R
DC
DC
For R
DC
DC
V
V
V
V
For R
For R
See fig. 55 for other
resistor values (R
For R
I
See fig. 55 for other
resistor values (R
to select different I
values
to select different
I
LIMIT
LIMIT
V
V
V
V
MAX
MAX
UV
OV
UV
OV
MAX
MAX
UV
OV
UV
OV
LS
LS
= I
= I
= 100 VDC
= 450 VDC
I
I
@100 VDC = 78%
@375 VDC = 38%
@100 VDC = 78%
@375 VDC = 38%
LIMIT
LIMIT
= I
= I
= 100 VDC
= 450 VDC
values
= 69%
IL
IL
IL
= 2 M
= 2 M
OV
UV
OV
= 12 k
= 25 k
= 12 k
UV
x R
x R
= 69%
= 43%
PI-2629-040501
x R
x R
PI-2509-040501
PI-2517-040501
LS
LS
LS
LS
IL
IL
LIMIT
)
)