Rev. C 06/15

22

TOP232-234

www.power.com

Figure 29. Layout Considerations for TOPSwitch-FX using DIP or SMD (Using Line Sensing for Under-Voltage and Overvoltage).

TOP VIEW

PI-2543-062615

Y1-

Capacitor

Opto-

coupler

D

+

–

HV

J1

R1

+

– DC

Out

Input Filter Capacitor

Output Filter Capacitor

Safety Spacing

T

r

a

n

s

f

o

r

m

e

r

Maximize hatched copper

areas (

) for optimum

heat sinking

S

PRI

SEC

S

S

S

C

BIAS

M

TOPSwitch-FX

Figure 30. Layout Considerations for TOPSwitch-FX using TO-220 Package (Using Current Limit Reduction with Line Voltage).

TOP VIEW

PI-2544-062615

Y1-

Capacitor

Opto-

coupler

D

+

–

HV

+

– DC

Out

Input Filter Capacitor

Heat Sink

Output Filter Capacitor

Safety Spacing

T

r

a

n

s

f

o

r

m

e

r

Maximize hatched copper

areas (

) for optimum

heat sinking

PRI

SEC

C

J1

R1

R2

TOPSwitch-FX

BIAS

T

r

a

n

s

f

o

r

m

e

r

M

S

F