L6223 STMicroelectronics, L6223 Datasheet - Page 21

• Manufacturer Part Number: L6223
• Description: DMOS PROGRAMMABLE HIGH SPEED UNIPOLAR STEPPER MOTOR DRIVER
• Manufacturer: STMicroelectronics

Figure 27: Simplified waveforms of the current through the phase A (winding MA) and through the phase
stepper motor in the Full Step Mode.
The calculations consider three different condi-
tions of heatsinking: the package with minimum
dissipating copper area on the p.c.b. (R
Figure 26: Phase current waveform during chopping: the current decay during t
B (winding MB). See also fig.22.
thj-amb
=
55 C); the copper side of 6 cm
40 C/W - See Fig. 34) and the additional heatsink
(R
thj-amb
= 30 C/W).
OFF
is halved.
2
(R
thj-amb
L6223
21/33
=