L293B - L293E
MOUNTING INSTRUCTIONS
The R
th j-amb
of the L293B and the L293E can be re-
duced by soldering the GND pins to a suitable cop-
per area of the printed circuit board as shown in fig-
ure 12 or to an external heatsink (figure 13).
Figure 12 :Example
of P.C. Board Copper
Area which is Used as Heatsink
During soldering the pins temperature must not ex-
ceed 260
o
C and the soldering time must not be
longer than 12 seconds.
The external heatsink or printed circuit copper area
must be connected to electrical ground.
Figure 13 :External
Heatsink Mounting Ex-
ample (Rth = 30
o
C/W)
9/12