|
|
PDF SLA7042 Data sheet ( Hoja de datos )
| Número de pieza | SLA7042 | |
| Descripción | MICROSTEPPING/ UNIPOLAR PWM/ HIGH-CURRENT MOTOR CONTROLLER/DRIVER | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SLA7042 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
SLA7042M AND
SLA7044M
MICROSTEPPING, UNIPOLAR PWM,
HIGH-CURRENT MOTOR CONTROLLER/DRIVER
OUT A
STROBE A
REF/ENABLE A
CNTRL SPLY A
CLOCK A
SERIAL DATA A
GROUND A
OUT A
SENSE A
SENSE B
OUT B
GROUND B
STROBE B
REF/ENABLE B
CNTRL SPLY B
CLOCK B
SERIAL DATA B
OUT B
Dwg. PK-008
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Load Supply Voltage, VBB . . . . . . . . . . . . 46 V
FET Output Voltage, VDS . . . . . . . . . . . 100 V
Control Supply Voltage, VDD . . . . . . . . . 7.0 V
Peak Output Current,
IOUTM (tw ≤ 10 µs) . . . . . . . . . . . . . . . . 5.0 A
Continuous Output Current, IOUT
SLA7042M . . . . . . . . . . . . . . . . . . . . . 1.5 A
SLA7044M . . . . . . . . . . . . . . . . . . . . . 3.0 A
Input Voltage Range,
VIN . . . . . . . . . . . . . . -0.3 V to VDD + 0.3 V
Reference Voltage, VREF . . . . . . . . . . . . VDD
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
The SLA7042M and SLA7044M are designed for high-efficiency
and high-performance microstepping operation of 2-phase, unipolar
stepper motors. Microstepping provides improved resolution without
limiting step rates, and provides much smoother low-speed motor
operation. An automated, innovative packaging technology combined
with power NMOS FETs and monolithic CMOS logic/control circuitry
advances power multi-chip modules (PMCMs™) toward the complete
integration of motion control. Each half of these stepper motor control-
ler/drivers operate independently. The 4-bit shift registers are serially
loaded with motor phase information and output current-ratio data (eight
levels). The combination of user-selectable current-sensing resistor,
linearly adjustable reference voltage, and digitally selected output
current ratio provides users with a broad, variable range of of full, half,
and microstepping motor control (IOUT ≈ [VREF/3 • RS] • Current Ratio).
Each PMCM is rated for a maximum motor supply voltage of 46 V
and utilizes 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. Highly
automated manufacturing techniques provide low-cost and exception-
ally reliable PMCMs suitable for controlling and directly driving a broad
range of 2-phase, unipolar stepper motors. The SLA7042M and
SLA7044M are identical except for rDS(on) and output current ratings.
Complete applications information is given on the following pages.
PWM current is regulated by appropriately choosing current-sensing
resistors, a voltage reference, and digitally programmable current ratio.
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 Microstepping Unipolar Drive
s High-Efficiency, High-Speed PWM
s Independent PWM Current Control
(2-Phase)
s Digitally Programmable PWM
Current Control
s Low Component-Count PWM Drive
s Low Internal-Power Dissipation
s Electrically Isolated Power Tab
s Logic IC- and µP-Compatible
Inputs
s Machine-Insertable Package
Always order by complete part number: SLA7042M .
™
1 page  
SLA7042M AND SLA7044M
MICROSTEPPING,
UNIPOLAR PWM, HIGH-CURRENT
MOTOR CONTROLLER/DRIVERS
REGULATING THE PWM OUTPUT CURRENT
The output current (and motor coil current) waveform
is illustrated in Figure 1. Setting the maximum PWM
current trip point to meet the specified full-step running
current for the motor, IOUT max (DATA input = 111X =
100% ratio), requires only a current-sensing resistor, RS,
and an input reference voltage, VREF/EN, between 0.4 V
and 2.5 V.
IOUT max
≈
VREF/EN
3 • RS
PHASE A
0
PHASE A
I OUT
Dwg. WK-001
FIGURE 1.␣ PHASE A COIL CURRENT WAVEFORM
SERIAL DATA INPUT ENABLE
In a minimum-component application, a voltage divider
provides VREF/EN and an npn transistor provides the
required pull-down to enable the serial data input as
shown in Figure 2.
IOUT max ≈
R2
R1 + R2
•
Vb
3 • RS
µP STEPPER MOTOR CONTROL
Alternative REFERENCE/ENABLE input configura-
tions provide for more complete motor control. A tri-state
logic element and a voltage divider allows a fixed refer-
ence voltage, with both output disable and data enable
functions. Complete µP control is usually accomplished
with a D/A converter as shown in Figure 3. Here, digital
control provides an output disable (>VDD - 1 V), VREF, and
VEN (<2.5 V).
ENABLE
DATA
SERIAL DATA
VDD
V BB
B
Vb
TO CHANNEL B
R1
VREF/EN
D/A
R2
PWM
OFF-TIME
CONTROL
Ø
CONTROL
LOGIC
AA
DRIVE
SENSE
B
RS
FIGURE 2.␣ PWM CONTROL (RUN MODE)
Dwg. EK-011
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SLA7042.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SLA7042 | MICROSTEPPING/ UNIPOLAR PWM/ HIGH-CURRENT MOTOR CONTROLLER/DRIVER | Allegro MicroSystems |
| SLA7042 | 2-Phase Stepper Motor Unipolar Driver ICs |  Sanken electric |
| SLA7042M | 2-Phase Stepper Motor Unipolar Driver ICs | Sanken electric |
| SLA7042M | MICROSTEPPING/ UNIPOLAR PWM/ HIGH-CURRENT MOTOR CONTROLLER/DRIVER | Allegro MicroSystems |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |