L298 STMicroelectronics, L298 Datasheet - Page 8

• Manufacturer Part Number: L298
• Description: DUAL FULL-BRIDGE DRIVER
• Manufacturer: STMicroelectronics

L298
This solution can drive until 3 Amps In DC operation
and until 3.5 Amps of a repetitive peak current.
OnFig 8 it is shownthe driving ofa twophasebipolar
stepper motor ; the needed signals to drive the in-
puts of the L298 are generated, in this example,
from the IC L297.
Fig 9 shows an example of P.C.B. designed for the
application of Fig 8.
Figure 8 : Two Phase Bipolar Stepper Motor Circuit.
This circuit drives bipolar stepper motors with winding currents up to 2 A. The diodes are fast 2 A types.
8/13
R
D1 to D8 = 2 A Fast diodes
S1
= R
S2
= 0.5
{
V
trr
F
200 ns
1.2 V @ I = 2 A
Fig 10 shows a second two phase bipolar stepper
motor control circuit where the current is controlled
by the I.C. L6506.