TOP224YN datasheet(9/20 Pages) POWERINT

9 / 20 page

TOP221-227

7/01

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.

Do not bend SOURCE pin.

Keep it short.

High Voltage

Return

Bias/Feedback

Return

Bias/Feedback

Input

CONTROL

SOURCE

DRAIN

TOP VIEW

High Voltage

Return

Bias/Feedback

Return

Bias/Feedback

Input

DIP-8/SMD-8 PACKAGE

TO-220 PACKAGE

TOP VIEW

Kelvin-connected

auto-restart/bypass capacitor C5

and/or compensation network

Kelvin-connected

auto-restart/bypass

capacitor C5

and/or compensation

network

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.

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