Datasheet L6219DS, L6219 Datasheet (SGS Thomson Microelectronics)

ABLE TO DRIVE BOTH WINDINGS OF BIPO­LAR STEPPER MOTOR

OUTPUT CURRENT UP TO 750mA EACH
WINDING

WIDEVOLTAGERANGE 10V TO 46V
HALF-STEP, FULL-STEP AND MICROSTEPP-

INGMODE
BUILT-INPROTECTIONDIODES
INTERNALPWM CURRENT CONTROL
LOW OUTPUTSATURATIONVOLTAGE
DESIGNED FOR UNSTABILIZED MOTOR

SUPPLYVOLTAGE
INTERNALTHERMAL SHUTDOWN

DESCRIPTION

The L6219 is a bipolar monolithic integrated cir­cuits 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
microprocessorcontrolledstepper motor system.
The power stage is a dual full bridge capable of
sustaining 46V and including four diodes for cur­rent recirculation.
A crossconductionprotection is providedto avoid

L6219

STEPPER MOTOR DRIVER

Powerdip 20+2+2 PLCC44 SO20+2+2

ORDERING NUMBERS:

L6219 L6219D L6219DS

simultaneous cross conduction during switching
currentdirection.
An internal pulse-width-modulation (PWM) con­trols the output current to 750mA with peak start­up 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

December 1996

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L6219

PIN CONNECTIONS (Topview)

Powerdip and SO

PIN FUNCTIONS

PLCC44

PLCC

(*)

PDIP &

SO

Name Function

1;2 1;2 OUTPUT A See pins 5;21

4;42 3;23 SENSE RESISTOR Connection to Lower Emitters of Output Stage forInsertion of Current Sense

Resistor

5;41 4;22 COMPARATOR

INPUT

Input connected to the comparators. The voltageacross the sense resistor is
feedback to this input throught the low pass filter RC CC. The higher power
transistors are disabled when the sense voltage exceeds thereference
voltage of the selected comparator.When this occurs the current decays for
a time set by R

TCT(toff

= 1.1 RTCT). See fig. 1.

8;38 5;21 OUTPUT B Output Connection. The outputstage is a ”H” bridge formedby four

transistors and four diodessuitable for switching applications.
6;7;17 6;19 GROUND See pins 7;18
29;39;407;18 GROUND Ground Connection.With pins6 and 19 also conducts heatfrom die to

printed circuit copper.

16;37 8;20 INPUT 0 See INPUT 1 (pins 9;17)
19;30 9;17 INPUT 1 These pins and pins 8;20 (INPUT 0) are logicinputs which select the outputs

of the comparators to set the current level.Current also depends on the

sensing resistor and reference voltage. See FuncionalDescription.

20;27 10;16 PHASE This TTL-compatible logic inputssets the direction of current flowthrough

the load. A high levelcauses current to flow from OUTPUT A (source)to

OUTPUT B (sink). A schmitttrigger onthis input provides good noise

immunity and adelay circuit prevents output stageshort circuits during

switching.

21;26 11;15 REFERENCE

VOLTAGE

A voltage applied to thispin sets the reference voltage of the comparators,

this determining the outputcurrent (also thus dependingon R

and the two

s

inputs INPUT 0 and INPUT 1).

22;25 12;14 RC A parallel RC network connected to this pin sets the OFF time ofthe higher

power transistors. The pulsegenerator is a monostable triggered by the

24 13 V

output of thecomparators (t

- LOGIC SUPPLY Supply Voltage Input for Logic Circuitry

ss

= 1.1 RTCT).

off

44 24 Vs - LOAD SUPPLY Supply Voltage Input forthe 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, V

, OUT 1A and OUT 2Ais guaranteedup to 1.5KV (Human Body Model, 1500Ω, 100pF).

S,VSS

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ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

Supply Voltage 50 V

S

Output Current (peak) ±1A

I

o

Output Current (continuous) ±0.75 A

I

o

Logic Supply Voltage 7 V

SS

Logic Input VoltageRange -0.3 to +7 V

IN

Sense Output Voltage 1.5 V
Junction Temperature +150

J

Operating Temperature Range 0 to 70 °C

op

Storage Temperature Range -55 to +150 °C

stg

V

V

V

V

sense

T

T

T

THERMAL DATA

Symbol Description PLCC PDIP SO Unit

R

thj-case

R

thj-amb

(*) With minimized copper area.

Thermal Resistance Junction-case Max.
Thermal Resistance Junction-ambient Max.1245 (*)1460 (*)1875 (*)

L6219

C

°

°C/W

C/W

°

ELECTRICALCHARACTERISTICS (Tj=25°C,VS= 46V, VSS= 4.75Vto 5.25V, V

= 5V; unlessoth-

REF

erwise specified)See fig.3.

Symbol Parameter Test Condition Min. Typ. Max. Unit

OUTPUTDRIVERS (OUTAor OUTB)

I

V

CE(sat)

I

S(on)

I

S(off)

V

CEX

I

V

Motor Supply Range 10 46 V

S

Output Leakage Current V

Output Saturation Voltage Sink Driver, I

Clamp Diode Leakage Current VR = 50V - <1 50 µA

R

Clamp Diode Forward Voltage SinkDiode

F

=Vs

OUT

V

=0

OUT

Sink Driver, I

OUT = +750mA

Source Driver, I
Source Driver, I

Source Diode I

= +500mA

OUT

OUT
OUT

=750mA

F

= -500mA
= -750mA

-

-

-

-

-

-

<1

<-1

0.3

0.7

1.1

1.3

1

1
Driver Supply Current Both Bridges ON, No Load - 8 15 mA
Driver Supply Current Both Bridges OFF - 6 10 mA

50

-50

0.6
1

1.4

1.6

1.5

1.5

CONTROLLOGIC

V

IN(H)

V

IN(L)

I

IN(H)

I

IN(L)

V

REF

I

SS(ON)

I

SS(OFF)

Input Voltage All Inputs 2.4 - - V
Input Voltage All Inputs - - 0.8 V
Input Current VIN = 2.4V - <1 20 µA
Input Current VIN = 0.84V - -3 -200
Reference Voltage Operating 1.5 - 7.5 V
Total Logic Supply Current Io=I1= 0.8V, No Load - 64 74 mA
Total Logic Supply Current Io=I1= 2.4V, No Load - 10 14 mA

COMPARATORS

µ
µA

µ

A

V
V
V
V

V
V

A

V

REF/Vsense

t

off

t

d

Current Limit Threshold (attrip
point

Cutoff Time Rt = 56KΩ Ct= 820pF - 50 s
Turn Off Delay Fig. 1 - 1 s

Io=I1= 0.8V 9.5 10 10.5 -

= 2.4V, I1= 0.8V 13.5 15 16.5 -

I

o

= 0.8V, I1= 2.4V 25.5 30 34.5 -

I

o

µ
µ

3/10

L6219

ELECTRICALCHARACTERISTICS(Continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

PROTECTION

T

J

Figure 1

Thermal Shutdown Temperature - 170 - °C

FUNCTIONAL DESCRIPTION

The circuit is intended to drive both windings of a
bipolar steppermotor.
The peak current control is generated through
switch mode regulation.
There is a choice of three different current levels
with the two logic inputs I
I

02-I12

for winding2.

01-I11

for winding 1 and

The current can also be switchedoff completely

Input Logic (I

and I1)

0

The current level in the motor winding is selected
with these inputs. (See fig. 2)
If any ofthe logic inputsis left open,the circuit will
treat it hasa highlevel input.

I

o

H

L

H

L

I

1

No Current

H

Low Current1/3 I

H
L

Medium Current 2/3 I

L

Maximum Current I

Current Level

max

o

o

max

o

max

Phase

This input determines the directionof current flow

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in the windings, depending on the motor connec­tions. 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 stageduring phase-shift.
High level on the PHASE input causes the motor
current flow from Out A through the winding to
Out B

Current Sensor

This part contains a current sensing resistor (R
a low pass filter (R

) and threecomparators.

C,CC

S

Only one comparator is active at a time. It is acti­vated by the input logic according to the current
levelchosen with signalsI

andI1.

o

The motor current flows through the sensing re­sistor R

.

S

When the current has increased so that the volt­age across R

becomes higher than the refer-

S

ence voltage on the other comparator input, the
comparator goes high, which triggers the pulse
generator.
The max peak current I

I

max

canbe definedby:

max

V

ref

=

10 R

s

),

Figure 2: Principle OperatingSequence

L6219

Single-pulseGenerator

The pulse generator is a monostabletriggered on
the positive going edge of thecomparator output.
The monostable output is high during the pulse
time, t
nents R

, which is determined by the time compo-

off

andCt.

t

= 1.1•RtC

t

off

t

The single pulse switches off the power feed to
the motor winding, causing the winding current to
decreaseduring t
If a new triggersignal should occurduring t

off

.

,itis

off

ignored.

OutputStage

The output stage contains four Darlingtontransis­tors (source drivers) four saturated transistors
(sink drivers) and eight diodes, connected in two
H bridge.
The source transistors are used to switch the
power supplied to the motor winding, thusdriving
a constant current through thewinding.
It should be noted however, that is not permitted
to short circuit the outputs.
Internal circuitry is added in order to increase the
accuracyof the motorcurrent particularly with low
currentlevels.

5/10

L6219

VS,VSS,V

The circuit will stand any order of turn-on or turn­off the supply voltages V
values are thenassumed.
Preferably, V
power-on and power-offif V

Ref

and VSS. Normal dV/dt

S

should be tracking VSSduring

Ref

is established.

S

As the circuit operates with switch mode current
regulation, interference generation problems
might arise in someapplications. A good measure
might then be to decouplethe circuit with a 100nF
capacitor, located near the package between

powerline and ground.
APPLICATIONINFORMATIONS(Note1)
Some stepper motors are not designed for contin­uous operationat maximumcurrent. As the circuit
drives a constant current through the motor, its
temperature might increase exceedingly both at
low and high speedoperation.

The ground lead between R

should be kept as shortas possible.

A typical Application Circuitis shownin Fig. 3.

Note that C

mustbe NPO type or similarelse.

t

To sense the winding current, paralleled metal

film resistorsare recommended(R
Also, some stepper motors have such high core
losses that they are not suited for switch mode
current regulation.
Unused inputs should be connected to proper
voltage levels in order to get the highest noise im-

Note 1 - Other information is available as ”Smart

PowerDevelopment System”:

Test board HWL6219(Stepper driver)

SoftwareSWL6219 (Floppydisc)
munity.

Figure 3: Typical ApplicationCircuit. (Pinout referredto DIP24package)

, and circuit GND

s

)

s

6/10

DIP24 PACKAGEMECHANICAL DATA

L6219

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 4.320 0.170
A1 0.380 0.015
A2 3.300 0.130

B 0.410 0.460 0.510 0.016 0.018 0.020
B1 1.400 1.520 1.650 0.055 0.060 0.065

c 0.200 0.250 0.300 0.008 0.010 0.012
D 31.62 31.75 31.88 1.245 1.250 1.255
E 7.620 8.260 0.300 0.325
e 2.54 0.100

E1 6.350 6.600 6.860 0.250 0.260 0.270

e1 7.620 0.300

L 3.180 3.430 0.125 0.135

M0°min, 15° max.

E1

A2

A

13

12

A1

SDIP24L

e1

c

M

L

BeB1

D

24

1

7/10

L6219

PLCC44 PACKAGEMECHANICALDATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 17.4 17.65 0.685 0.695
B 16.51 16.65 0.650 0.656

C 3.65 3.7 0.144 0.146

D 4.2 4.57 0.165 0.180
d1 2.59 2.74 0.102 0.108
d2 0.68 0.027

E 14.99 16 0.590 0.630
e 1.27 0.050

e3 12.7 0.500

F 0.46 0.018

F1 0.71 0.028

G 0.101 0.004

M 1.16 0.046

M1 1.14 0.045

mm inch

8/10

P027B

SO24 PACKAGEMECHANICAL DATA

L6219

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 2.35 2.65 0.093 0.104

A1 0.10 0.30 0.004 0.012

A2 2.55 0.100

B 0.33 0.51 0.013 0.0200

C 0.23 0.32 0.009 0.013

D 15.20 15.60 0.598 0.614

E 7.40 7.60 0.291 0.299

e 1.27 0,050

H 10.0 10.65 0.394 0.419

h 0.25 0.75 0.010 0.030

k0°(min.), 8° (max.)

L 0.40 1.27 0.016 0.050

mm inch

A2

A

0.10mm
.004

Seating Plane

Be

A1

K

D

1324

E

112

h x 45?

L

A1 C

H

SO24

9/10

L6219

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third partieswhich may result from its use. No
license is granted by implicationor otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificationmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS­THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.

 1996 SGS-THOMSON Microelectronics– Printed in Italy– All Rights Reserved

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