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L6219DS Scheda tecnica(PDF) 5 Page - STMicroelectronics

Il numero della parte L6219DS
Spiegazioni elettronici  STEPPER MOTOR DRIVER
Download  9 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6219DS Scheda tecnica(HTML) 5 Page - STMicroelectronics

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The source transistors are used to switch the
power supplied to the motor winding, thus driving
a constant current through the winding.
It should be noted however, that is not permitted
to short circuit the outputs.
Internal circuitry is added in order to increase the
accuracy of the motor current particularly with low
current levels.
VS, VSS, VRef
The circuit will stand any order of turn-on or turn-
off the supply voltages VS and VSS. Normal dV/dt
values are then assumed.
Preferably, VRef should be tracking VSS during
power-on and power-off if VS is established.
APPLICATION INFORMATIONS (Note 1)
Some stepper motors are not designed for contin-
uous operation at maximum current. As the circuit
drives a constant current through the motor, its
temperature might increase exceedingly both at
low and high speed operation.
Also, some stepper motors have such high core
losses that they are not suited for switch mode
Figure 2: Principle Operating Sequence
L6219
5/9


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