■
The potential voltage of each terminal is given below. External components that are
connected to these terminals should be at same potential voltage.
Primary side
（
Input line)
：
AC, BC, R pin
Secondary side
（
Output line)
：
VOUT, S, VTRM, ITRM, CB, AUX, RC, PG, PGG pin
FG(Aluminum base plate)
：
Nut (4 places), Aluminum base plate, Heat sink
■
In order to meet the breakdown voltage specification of products, insulation distance
components and between patterns is recommended to ensure the following.
Primary circuit - Secondary circuit
： 8
mm or more
Primary circuit - FG
：
5mm or more
Secondary circuit - FG
：
1.6mm or more
Primary circuit - Primary circuit
：
3mm or more
AC terminal line - BC terminal line
：
3mm or more
■
Clearance and creepage requirements vary based on different safety standards and
conditions of usage. Please place the components and wiring pattern according to those
safety standards.
Fig.8.1
Insulation
distance
8.1 Consideration for board layout
A-18
Applications Manual
TUNS1200
Aluminum base plate
：
FG
PGG
RC2
CB
+S
-S
-BC
+BC
AC2
AC1
R
-VOUT
+VOUT
4-FG
PG
RC1
AUX
ITRM
VTRM
2.1 Pin configuration
8. Board layout
