L293 Datasheet, PDF (10/19 Pages) Texas Instruments – QUADRUPLE HALF-H DRIVER

L293, L293D
QUADRUPLE HALFĆH DRIVERS
SLRS008C − SEPTEMBER 1986 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
IL1/IL2 = 300 mA
C1
0.22 µF
D5
D1
VCC2
L1
IL1
D6
D2
1
2
+
3
4
5
6
+
7
8
L293
16
15
+
14
13
12
11
+
10
9
VCC1
D8
D4
L2
IL2
D7
D3
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.
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