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STMicroelectronics Electronic Components Datasheet

L6219 Datasheet

STEPPER MOTOR DRIVER

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L6219 pdf
L6219
STEPPER 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
DESCRIPTION
The 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
BLOCK DIAGRAM
Powerdip 20+2+2 PLCC44
SO20+2+2
ORDERING NUMBERS:
L6219
L6219D
L6219DS
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 direc-
tion.
A thermal protection circuitry disables the outputs
if the chip temperature exceeds safe operating
limits.
December 1996
1/10


STMicroelectronics Electronic Components Datasheet

L6219 Datasheet

STEPPER MOTOR DRIVER

No Preview Available !

L6219 pdf
L6219
PIN CONNECTIONS (Top view)
Powerdip and SO
PLCC44
PIN FUNCTIONS
PLCC
(*)
1;2
4;42
5;41
8;38
6;7;17
29;39;
40
16;37
19;30
20;27
21;26
22;25
24
44
PDIP &
SO
Name
Function
1;2
OUTPUT A
See pins 5;21
3;23 SENSE RESISTOR Connection to Lower Emitters of Output Stage for Insertion of Current Sense
Resistor
4;22 COMPARATOR Input connected to the comparators. The voltage across the sense resistor is
INPUT
feedback to this input throught the low pass filter RC CC. The higher power
transistors are disabled when the sense voltage exceeds the reference
voltage of the selected comparator. When this occurs the current decays for
a time set by RT CT (toff = 1.1 RT CT). See fig. 1.
5;21
OUTPUT B
Output Connection. The output stage is a ”H” bridge formed by four
transistors and four diodes suitable for switching applications.
6;19
GROUND
See pins 7;18
7;18
GROUND
Ground Connection. With pins 6 and 19 also conducts heat from die to
printed circuit copper.
8;20
INPUT 0
See INPUT 1 (pins 9;17)
9;17
INPUT 1
These pins and pins 8;20 (INPUT 0) are logic inputs which select the outputs
of the comparators to set the current level. Current also depends on the
sensing resistor and reference voltage. See Funcional Description.
10;16
PHASE
This TTL-compatible logic inputs sets the direction of current flow through
the load. A high level causes current to flow from OUTPUT A (source) to
OUTPUT B (sink). A schmitt trigger on this input provides good noise
immunity and a delay circuit prevents output stage short circuits during
switching.
11;15
REFERENCE
VOLTAGE
A voltage applied to this pin sets the reference voltage of the comparators,
this determining the output current (also thus depending on Rs and the two
inputs INPUT 0 and INPUT 1).
12;14
13
RC A parallel RC network connected to this pin sets the OFF time of the higher
power transistors. The pulse generator is a monostable triggered by the
output of the comparators (toff = 1.1 RT CT).
Vss - LOGIC SUPPLY Supply Voltage Input for Logic Circuitry
24 Vs - LOAD SUPPLY Supply Voltage Input for the Output Stages.
(*) Pins: 3, 9,10,11,12,13,14,15,18,23,28,31,32,33,34,35,36,43 are Not Connected.
Note: ESD on GND, VS, VSS, OUT 1A and OUT 2A is guaranteed up to 1.5KV (Human Body Model, 1500Ω, 100pF).
2/10


Part Number L6219
Description STEPPER MOTOR DRIVER
Maker STMicroelectronics
Total Page 10 Pages
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