L6219D

Manufacturer Part NumberL6219D
DescriptionSTEPPER MOTOR DRIVER
ManufacturerSTMicroelectronics
L6219D datasheet
 


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Figure 2: Principle Operating Sequence
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.
V
, V
, V
S
SS
Ref
The circuit will stand any order of turn-on or turn-
off the supply voltages V
and V
S
values are then assumed.
Preferably, V
power-on and power-off if V
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
. Normal dV/dt
losses that they are not suited for switch mode
SS
L6219
should be tracking V
during
Ref
SS
is established.
S
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