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PDF SLA7026M Data sheet ( Hoja de datos )
| Número de pieza | SLA7026M | |
| Descripción | HIGH-CURRENT PWM/ UNIPOLAR STEPPER MOTOR CONTROLLER/DRIVERS | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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SLA7024M, SLA7026M,
AND SMA7029M
HIGH-CURRENT PWM, UNIPOLAR STEPPER
MOTOR CONTROLLER/DRIVERS
SMA7029M
OUTA
OFF DELAYA
REFERENCE A
GROUND A
IN A
VREF
+
The SLA7024M, SLA7026M, and SMA7029M are designed for
high-efficiency and high-performance operation of 2-phase, unipolar
stepper motors. An automated, innovative packaging technology
combined with power FETs and monolithic logic/control circuitry ad-
vances power multi-chip modules (PMCMs™) toward the complete
integration of motion control. Highly automated manufacturing tech-
niques provide low-cost and exceptionally reliable PMCMs suitable for
controlling and directly driving a broad range of 2-phase, unipolar
stepper motors. The three stepper motor multi-chip modules differ
primarily in output current ratings (1.5 A or 3.0 A) and package style.
OUT A
SENSE A
CNTRL SPLY
SENSE B
OUT B
OFF DELAY B
GROUND B
REFERENCE B
IN B
OUT B
VCC
VREF
Dwg. PK-007
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Load Supply Voltage, VBB . . . . . . . . . . . . 46 V
FET Output Voltage, VDS . . . . . . . . . . . 100 V
Control Supply Voltage, VCC . . . . . . . . . . 46 V
Peak Output Current, IOUTM (tw ≤ 100 µs)
SLA7024M . . . . . . . . . . . . . . . . . . . . . 3.0 A
SLA7026M . . . . . . . . . . . . . . . . . . . . . 5.0 A
SMA7029M . . . . . . . . . . . . . . . . . . . . 3.0 A
Continuous Output Current, IOUT
SLA7024M . . . . . . . . . . . . . . . . . . . . . 1.5 A
SLA7026M . . . . . . . . . . . . . . . . . . . . . 3.0 A
SMA7029M . . . . . . . . . . . . . . . . . . . . 1.5 A
Input Voltage Range, VIN . . . . -0.3 V to 7.0 V
Reference Voltage, VREF . . . . . . . . . . . 2.0 V
Package Power Dissipation, PD . See Graph
Junction Temperature, TJ . . . . . . . . . +150°C
Operating Temperature Range,
TA . . . . . . . . . . . . . . . . . . . . -20°C to +85°C
Storage Temperature Range,
Tstg . . . . . . . . . . . . . . . . . . -40°C to +150°C
All three PMCMs are rated for an absolute maximum limit of 46 V
and utilize advanced NMOS FETs for the high-current, high-voltage
driver outputs. The avalanche-rated (≥100 V) FETs provide excellent
ON resistance, improved body diodes, and very-fast switching. The
multi-chip ratings and performance afford significant benefits and
advantages for stepper drives when compared to the higher dissipation
and slower switching speeds associated with bipolar transistors.
Normally, heat sinks are not required for the SLA7024M or SMA7029M.
The SLA7026M, in demanding, higher-current systems designs,
necessitates suitable heat transfer methods for reliable operation.
Complete applications information is given on the following pages.
PWM current is regulated by appropriately choosing current-sensing
resistors, a voltage reference, a voltage divider, and RC timing net-
works. The RC components limit the OFF interval and control current
decay. Inputs are compatible with 5 V logic and microprocessors.
BENEFITS AND FEATURES
s Cost-Effective, Multi-Chip Solution
s ‘Turn-Key’ Motion-Control Module
s Motor Operation to 3 A and 46 V
s 3rd Generation High-Voltage FETs
s 100 V, Avalanche-Rated NMOS
s Low rDS(on) NMOS Outputs
s Advanced, Improved Body Diodes
s Single-Supply Motor/Module
Operation
s Half- or Full-Step Unipolar Drive
s High-Efficiency, High-Speed PWM
s Dual PWM Current Control (2-Phase)
s Programmable PWM Current Control
s Low Component Count PWM Drive
s Low Internal Power Dissipation
s Heat Sinking (Normally) Unnecessary
s Electrically Isolated Power Tab
s Logic IC- and µP-Compatible Inputs
s Machine-Insertable Package
Always order by complete part number:
Part Number
Package
SLA7024M
SLA7026M
SMA7029M
18-Lead Power-Tab SIP
18-Lead Power-Tab SIP
15-Lead SIP
Output Current
1.5 A
3.0 A
1.5 A
™
1 page  
SLA7024M, SLA7026M, AND SMA7029M
HIGH-CURRENT PWM,
UNIPOLAR STEPPER MOTOR
CONTROLLER/DRIVERS
TYPICAL STEPPER MOTOR APPLICATIONS
(Half of Device Shown)
SMA7029M
V BB
Vb +5 V
8
VCC
REG.
TO
CHANNEL
A
2.4 kΩ
R5
VREF
13
+
+
IN B
14
OUT B
10
OUT B
15
A
A
td
11
+5 V
R3 47 kΩ
OPEN-COLLECTOR
INVERTER
12
C1
470 pF
C3 2200 pF
TRUTH TABLES
(SMA7029M Only)
SENSE
9
RS
≤1 Ω
Dwg. EK-008-1
WAVE DRIVE (FULL STEP) for SMA7029M
Sequence
Input A
Input tdA*
Input B
Input tdB*
Output ON
0 1 23 0
H L LL H
L L HL L
L H LL L
L L LH L
A B AB A
*Logic signals to external open-collector inverter connected to tdA and tdB.
2- PHASE (FULL STEP) OPERATION
for SMA7029M
Sequence
0
1
2
3
Input A
HHL L
Input B
L HH L
Outputs ON A B AB A B AB
0
H
L
AB
5 Page 
SLA7024M, SLA7026M, AND SMA7029M
HIGH-CURRENT PWM,
UNIPOLAR STEPPER MOTOR
CONTROLLER/DRIVERS
SLA7024M and SLA7026M
Dimensions in Inches
(for reference only)
0.126
±0.006
ø
1.22 ±0.008
0.961 ±0.008
0.646
±0.008
0.126 ±0.006 x 0.150
0.189
±0.008
0.067
±0.004
3.2
±0.15
ø
1
1.232 ±0.008
0.026
+0.008
–0.004
0.264
±0.020
18
0.022
+0.008
–0.004
0.066
±0.016
0.096
±0.008
0.118
0.157
±0.028
Dwg. MK-002-18 in
Dimensions in Millimeters
(controlling dimensions)
31±0.2
24.4 ±0.2
16.4 ±0.2
3.2 ±0.15 x 3.8
4.8
±0.2
1.7
±0.1
1
31.3 ±0.2
0.65
+0.2
–0.1
6.7
±0.5
18 0.55 +0.2
–0.1
1.68
±0.4
4.0
±0.7
2.45
±0.2
3.0
Dwg. MK-002-18 mm
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Recommended mounting hardware torque: 4.34 – 5.79 lbf•ft (6 – 8 kgf•cm or 0.588 – 0.784 Nm).
3. The hatched area is exposed (electrically isolated) heat spreader.
4. Recommend use of metal-oxide-filled, alkyl-degenerated oil base, silicone grease (Dow Corning 340 or equivalent).
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SLA7026M.PDF ] | |
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