L293, L293D
QUADRUPLE HALF H DRIVERS
SLRS008C − SEPTEMBER 1986 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
IL1/IL2 = 300 mA
C1
0.22
µF
1
2
D5
D1
3
4
+
L293
16
15
+
14
13
12
11
VCC1
D8
D4
VCC2
L1
IL1
5
6
+
7
8
+
L2
IL2
10
9
D7
D3
D6
D2
D1−D8 = SES5001
Figure 6. Bipolar Stepping-Motor Control
mounting instructions
The Rthj-amp of the L293 can be reduced by soldering the GND pins to a suitable copper area of the printed
circuit board or to an external heat sink.
Figure 9 shows the maximum package power P
TOT
and the
θ
JA
as a function of the side of two equal square
copper areas having a thickness of 35
µm
(see Figure 7). In addition, an external heat sink can be used (see
Figure 8).
During soldering, the pin temperature must not exceed 260°C, and the soldering time must not exceed 12
seconds.
The external heatsink or printed circuit copper area must be connected to electrical ground.
10
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•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
