Datasheet

TOP221-227
D
7/01
9
Figure 9. Recommended TOPSwitch Layout.
PI-2021-041798
PC Board
Kelvin-connected
auto-restart/bypass capacitor C5
and/or compensation network
Bias/Feedback Input
Bias/Feedback Return
High-voltage Return
Bend DRAIN pin
forward if needed
for creepage.
DRAIN
SOURCE
CONTROL
Do not bend SOURCE pin.
Keep it short.
High Voltage
Return
Bias/Feedback
Return
D
S
C
Bias/Feedback
Input
CONTROL
SOURCE
SOURCE
DRAIN
TOP VIEW
High Voltage
Return
Bias/Feedback
Return
Bias/Feedback
Input
DIP-8/SMD-8 PACKAGE
TO-220 PACKAGE
TOP VIEW
C5
Kelvin-connected
auto-restart/bypass capacitor C5
and/or compensation network
Kelvin-connected
auto-restart/bypass
capacitor C5
and/or compensation
network
C5
C5
Design Tools
The following tools available from Power Integrations greatly
simplify TOPSwitch based power supply design.
• Data Book and Design Guide includes extensive application
information
• Excel Spreadsheets for Transformer Design - Use of this
tool is strongly recommended for all TOPSwitch designs.
• Reference design boards – Production viable designs that
are assembled and tested.
All data sheets, application literature and up-to-date versions of
the Transformer Design Spreadsheets can be downloaded from
our Web site at www.powerint.com. A diskette of the
Transformer Design Spreadsheets may also be obtained by
sending in the completed form provided at the end of this data
sheet.