SGS Thomson Microelectronics L6219DSA Datasheet



STEPPER MOTOR DRIVER FOR AUTOMOTIVE RANGE

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 L6219DSA is a bipolar monolithic integrated
circuits intended to control and driveboth winding
of a bipolar stepper motor or bidirectionally con­trol two DCmotors.
The L6219DSA with a few external components
form a complete control and drive circuit for LS­TTL or microprocessor controlled stepper motor
system.
The power stage is a dual full bridge capable of
sustaining 46V and including four diodes for cur­rent recirculation.

L6219DSA

SO20+2+2

ORDERING NUMBER: L6219DSA

A cross conduction protection is provided to avoid
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

November 1998

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L6219DSA

PIN CONNECTION (Top view)

PIN FUNCTIONS

N° Name Function

1;2 OUTPUT A Seepins 5;21
3;23 SENSERESISTOR Connection to Lower Emitters of OutputStage forInsertion of Current SenseResistor
4;22 COMPARATOR

INPUT

Inputconnected to the comparators. The voltage across 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 the reference voltage of theselected
comparator. When this occurs the current decays for atime set by R

TCT(toff

= 1.1 R

CT). See fig. 1.

5;21 OUTPUT B Output Connection. The output stage is a ”H” bridge formed by four transistorsand

fourdiodes suitable for switching applications.
6;19 GROUND Seepins 7;18
7;18 GROUND Ground Connection. With pins 6 and 19 also conducts heat from dieto printed circuit

copper.
8;20 INPUT 0 SeeINPUT 1(pins 9;17)
9;17 INPUT 1 Thesepins and pins 8;20 (INPUT 0) are logic inputs which selectthe 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 thedirection of currentflow through the load. A

highlevel causes current to flow from OUTPUT A (source) to OUTPUT B (sink). A

schmitt trigger on this input provides good noise immunity and a delaycircuit prevents

outputstage short circuits duringswitching.

11;15 REFERENCE

VOLTAGE

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

determining the output current (also thus depending on R

and the two inputs INPUT

s

0 and INPUT 1).

12;14 RC A parallel RC network connectedto this pinsets theOFF timeof the higher power

transistors. The pulse generator is a monostabletriggered by theoutput of the

13 V

comparators (t

- LOGIC SUPPLY Supply Voltage Input for LogicCircuitry

ss

= 1.1 RTCT).

off

24 Vs - LOAD SUPPLY Supply Voltage Input for theOutput Stages.

Note: ESD on GND, VS,VSS, OUT 1A and OUT 2Ais guaranteedup to 1.5KV (Human Body Model,1500Ω, 100pF).

T

2/8

L6219DSA

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

V

sense

T

T

T

THERMAL DATA

Symbol Description Value Unit

R

thj-case

R

thj-amb

(*) With minimized copper area.

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 -40 to 125 °C

op

Storage Temperature Range -55 to +150 °C

stg

Thermal Resistance Junction-case Max.
Thermal Resistance Junction-ambient Max.

18

75 (*)

C

°

°C/W

C/W

°

ELECTRICALCHARACTERISTICS (Tj= -40to 125°C,VS= 46V,VSS= 4.75V to 5.25V, V

REF

less otherwisespecified)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

V

Motor Supply Range 10 46 V

S

Output Leakage Current VS = 52V V

V

= 52V V

S

Output Saturation Voltage Sink Driver, I

Sink Driver, I
Source Driver, I
Source Driver, I

Clamp Diode Forward Voltage High stage IF =750mA

F

Low stage I

= 50V

OUT

= 1V -200

OUT

= +500mA

OUT

OUT = +750mA

= -500mA

OUT

= -750mA

OUT

F =750mA

Driver Supply Current Both Bridges ON, No Load 17 mA
Driver Supply Current Both Bridges OFF 12 mA

200

0.75

1.15

1.6

1.8

1.7

1.6

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 µA
Reference Voltage Operating 1.5 7.5 V
Total Logic Supply Current Io=I1= 0.8V, No Load 76 mA
Total Logic Supply Current Io=I1= 2.4V, No Load 15 mA

COMPARATORS

= 5V; un-

A

µ
µA

V
V
V
V

V
V

V

REF/Vsense

t

off

t

d

Current Limit Threshold (attrip
point

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

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

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