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L6208 датащи(PDF) 25 Page - STMicroelectronics

номер детали L6208
подробное описание детали  DMOS driver for bipolar stepper motor
PDF  35 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6208 датащи(HTML) 25 Page - STMicroelectronics

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L6208
Application information
35
Figure 25. Typical application
8.1
Output current capability and IC power dissipation
In Figure 26, 27, 28 and 29 are shown the approximate relation between the output current
and the IC power dissipation using PWM current control driving a two phase stepper motor,
for different driving sequences:
HALF STEP mode (Figure 26) in which alternately one phase / two phases are
energized.
NORMAL DRIVE (FULL STEP TWO PHASE ON) mode (Figure 27) in which two
phases are energized during each step.
WAVE DRIVE (FULL STEP ONE PHASE ON) mode (Figure 28) in which only one
phase is energized at each step.
MICROSTEPPING mode (Figure 29), in which the current follows a sine wave profile,
provided through the Vref pins.
For a given output current and driving sequence the power dissipated by the IC can be
easily evaluated, in order to establish which package should be used and how large must be
the on-board copper dissipating area to guarantee a safe operating junction temperature
(125 °C maximum).



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