L6219DSA
Stepper motor driver
Datasheet − production data
Features
■
Drives both windings of a bipolar stepper motor
■
Output current up to 750 mA for each winding
■
Wide voltage range: 10 V to 46 V
■
Half-step, full-step and microstepping mode
■
Built-in protection diodes
■
Internal PWM current control
■
Low output saturation voltage
■
Designed for unstabilized motor supply voltage
■
Internal thermal shutdown
SO24
Description
The L6219DSA is a bipolar monolithic integrated
circuit intended to control and drive both windings
of a bipolar stepper motor or bidirectionally control
two DC motors.
With only a few external components, the
L6219DSA controls and drives the circuit for LSTTL or microprocessor-controlled stepper motor
systems. The power stage is a dual full bridge
sustaining 46 V and including four diodes for
current recirculation.
Table 1.
Cross conduction protection is provided to avoid
simultaneous cross conduction during switching
current direction.
An internal pulse-width modulation (PWM)
controls the output current to 750 mA with peak
startup current up to 1 A.
A wide range of current control from 750 mA
(each bridge) is permitted by two logic inputs and
an external voltage reference. A phase input to
each bridge determines the load current direction.
Thermal protection circuitry disables the outputs if
the chip temperature exceeds safe operating
limits.
Device summary
Order code
Package
Packing
E-L6219DSA
SO24
Tube
E-L6219DSATR
SO24
Tape and reel
October 2012
This is information on a product in full production.
Doc ID 4970 Rev 4
1/12
www.st.com
12
Contents
L6219DSA
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Input logic (I0 and I1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3
Current sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4
Single-pulse generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5
Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6
VS, VSS, VRef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12
Doc ID 4970 Rev 4
L6219DSA
1
Block diagram
Block diagram
Figure 1.
Block diagram
AM15158v1
Table 2.
Absolute maximum ratings
Parameter
Description
Value
Unit
Vs
Supply voltage
50
V
IO
Output current (peak)
±1
A
IO
Output current (continuous)
±0.75
A
Vss
Logic supply voltage
7
V
Vin
Logic input voltage range
-0.3 to +7
V
Vsense
Sense output voltage
1.5
V
Tj
Junction temperature
+150
°C
Top
Operating temperature range
-40 to +125
°C
Tstg
Storage temperature range
-55 to +150
°C
Doc ID 4970 Rev 4
3/12
Block diagram
L6219DSA
Figure 2.
SO24 pin connection (top view)
AM15159v1
Table 3.
Pin #
Name
1, 21
Output of bridge 1
3, 23
Sense resistor
Connection to lower emitters of output stage for insertion of
current sense resistor
4, 22
Comparator input
Input connected 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
the selected comparator. When this occurs the current
decays for a time set by RT CT (toff = 1.1 RT CT). See
Figure 3.
2, 5
Output of bridge 2
Output connection. The output stage is a H bridge formed
by four transistors and four diodes suitable for switching
applications.
6, 7, 18, 19
Ground
Ground connection. They also conduct heat from die to
printed circuit copper
8, 20
Input 0
See input 1 (pins 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 Section 2: Functional description.
10, 16
Phase
These TTL-compatible logic inputs set 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 a 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)
9, 17
4/12
Pin functions
Description
See pins 2, 5
Doc ID 4970 Rev 4
L6219DSA
Block diagram
Table 3.
Pin #
12, 14
13
24
Note:
Pin functions (continued)
Name
Description
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
VS - Load supply
Supply voltage input for the output stages
ESD on GND, VS, VSS, OUT 1 A and OUT 2 A is guaranteed up to 1.5 kV (human body
model, 1500 W, 100 pF).
Figure 3.
Timing diagram
AM15160v1
Table 4.
Thermal data
Parameter
Rthj-case
Rthj-amb
Description
Thermal resistance junction-case max.
Thermal resistance junction-ambient max.
PDIP
Unit
18
°C/W
75(1)
°C/W
1. With minimized copper area.
Doc ID 4970 Rev 4
5/12
Block diagram
L6219DSA
Table 5.
Electrical characteristcs
(Tj = -40 °C to -125 °C, VS = 46 V, VSS = 4.75 V to 5.25 V, VREF = 5 V, unless otherwise specified)
See Figure 5.
Parameter
Description
Test condition
Min.
Typ.
Max. Unit
10
-
46
V
VS = 52 V VOUT = 50 V
VS = 52 V VOUT = 1 V
-
200
-200
μA
μA
Sink driver, IOUT= +500 mA
Sink driver, IOUT = +750 mA
Source driver, IOUT = -500 mA
Source driver, IOUT = -750 mA
-
-
0.75
1.15
1.6
1.8
V
V
V
V
Output drivers (OUTA or OUTB)
VS
ICEX
VCE(sat)
Motor supply range
Output leakage current
Output saturation voltage
VF
Clamp diode forward
voltage
High stage IF =750 mA
Low stage IF =750 mA
-
-
1.7
1.6
V
V
IS(on)
Driver supply current
Both bridges ON, no load
-
-
17
mA
IS(off)
Driver supply current
Both bridges OFF
-
-
12
mA
Control logic
VIN(H)
Input voltage
All inputs
2.4
-
-
V
VIN(L)
Input voltage
All inputs
-
-
0.8
V
IIN(H)
Input current
VIN = 2.4 V
-
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