E-L6219 ,STEPPER MOTOR DRIVERapplications.6;19 GROUND See pins 7;187;18 GROUND Ground Connection. With pins 6 and 19 also conduc ..
E-L6219 ,STEPPER MOTOR DRIVERELECTRICAL CHARACTERISTICS (Tj = 25°C, VS = 46V, VSS = 4.75V to 5.25V, VREF = 5V; unless oth-erwise ..
E-L6219DS013TR ,Stepper Motor DriverFunctional description . . . . . . . 92.1 Input logic (I0 and I1) . 92.2 Phase . . ..
EL6298CL ,Laser diode driver with waveform generator.EL6298®Data Sheet July 15, 2004 FN7274Laser Diode Driver with Waveform
EL6298CL-T13 ,Laser diode driver with waveform generator.FeaturesGenerator 4MHz - 200MHz clockThe EL6298 is a highly integrated Complete programmable las ..
E-L6563TR ,ADVANCED TRANSITION-MODE PFC CONTROLLER
E-L6219-L6219DS013TR
STEPPER MOTOR DRIVER
L6219STEPPER MOTOR DRIVER
ABLE TO DRIVE BOTH WINDINGS OF BIPO-
LAR STEPPER MOTOR
OUTPUT CURRENT UP TO 750mA EACH
WINDING
WIDE VOLTAGE RANGE 10V TO 46V
HALF-STEP, FULL-STEP AND MICROSTEPP-
ING MODE
BUILT-IN PROTECTION DIODES
INTERNAL PWM CURRENT CONTROL
LOW OUTPUT SATURATION VOLTAGE
DESIGNED FOR UNSTABILIZED MOTOR
SUPPLY VOLTAGE
INTERNAL THERMAL SHUTDOWN
DESCRIPTIONThe L6219 is a bipolar monolithic integrated cir-
cuits intended to control and drive both winding of
a bipolar stepper motor or bidirectionally control
two DC motors.
The L6219 with a few external components form
a complete control and drive circuit for LS-TTL or
microprocessor controlled stepper motor system.
The power stage is a dual full bridge capable of
sustaining 46V and including four diodes for cur-
rent recirculation.
A cross conduction protection is provided to avoid
simultaneous cross conduction during switching
current direction.
An internal pulse-width-modulation (PWM) con-
trols the output current to 750mA with peak start-
up current up to 1A.
Wide range of current control from 750mA (each
bridge) is permitted by means of two logic inputs
and an external voltage reference. A phase input to
each bridge determines the load current direction.
A thermal protection circuitry disables the outputs
if the chip temperature exceeds safe operating
limits.
BLOCK DIAGRAM
PIN FUNCTIONS
Note: ESD on GND, VS, VSS, OUT 1A and OUT 2A is guaranteed up to 1.5KV (Human Body Model, 1500Ω, 100pF).
PIN CONNECTION (Top view)
L6219
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA(*) With minimized copper area.
ELECTRICAL CHARACTERISTICS (Tj = 25°C, VS = 46V, VSS = 4.75V to 5.25V, VREF = 5V; unless oth-erwise specified) See fig. 3.
OUTPUT DRIVERS (OUTA or OUTB)
CONTROL LOGIC
COMPARATORS
L6219
FUNCTIONAL DESCRIPTIONThe circuit is intended to drive both windings of a
bipolar stepper motor.
The peak current control is generated through
switch mode regulation.
There is a choice of three different current levels
with the two logic inputs I01 - I11 for winding 1 and
I02 - I12 for winding 2.
The current can also be switched off completely
Input Logic (I0 and I1)The current level in the motor winding is selected
with these inputs. (See fig. 2)
If any of the logic inputs is left open, the circuit will
treat it has a high level input.
PhaseThis input determines the direction of current flow
in the windings, depending on the motor connec-
tions. The signal is fed through a Schmidt-trigger
for noise immunity, and through a time delay in
order to guarantee that no short-circuit occurs in
the output stage during phase-shift.
High level on the PHASE input causes the motor
current flow from Out A through the winding to
Out B
Current SensorThis part contains a current sensing resistor (RS),
a low pass filter (RC, CC) and three comparators.
Only one comparator is active at a time. It is acti-
vated by the input logic according to the current
level chosen with signals Io and I1.
The motor current flows through the sensing re-
sistor RS.
When the current has increased so that the volt-
age across RS becomes higher than the refer-
ence voltage on the other comparator input, the
comparator goes high, which triggers the pulse
generator.
The max peak current Imax can be defined by:
Imax = Vref
10 Rs
Single-pulse GeneratorThe pulse generator is a monostable triggered on
the positive going edge of the comparator output.
The monostable output is high during the pulse
time, toff , which is determined by the time compo-
nents Rt and Ct.
toff = 1.1 ⋅ RtCt
The single pulse switches off the power feed to
the motor winding, causing the winding current to
decrease during toff.
If a new trigger signal should occur during toff, it is
ignored.
Output StageThe output stage contains four Darlington transis-
tors (source drivers) four saturated transistors
(sink drivers) and eight diodes, connected in two
H bridge.
Figure 1
ELECTRICAL CHARACTERISTICS (Continued)PROTECTION
L6219
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, VRefThe 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
