Site
Map • Contact
Us 中文 • English
High-Performance Power ICs and Hall-Effect Sensors
Related Links:
Datasheets:
SLA7024M, SLA7026M, and SMA7029M: High-Current PWM, Unipolar Stepper Motor Controller/Drivers (PDF)
Selection Guides:
Power Motor Drivers - Unipolar Stepper
- Home
- / Products
- / Part Numbers
- / SLA7024, SLA7026M, and SMA7029M
- / Part Numbers
- / Products
SLA7024M, SLA7026M, and SMA7029M
High-Current PWM, Unipolar Stepper Motor Controller/Drivers
Features
- Cost-Effective, Multi-Chip Solution
- 'Turn-Key' Motion-Control Module
- Motor Operation to 3 A and 46 V
- 3rd Generation High-Voltage FETs
- 100 V, Avalanche-Rated NMOS
- Low rDS(on) NMOS Outputs
- Advanced, Improved Body Diodes
- Single-Supply Motor/Module Operation
- Half- or Full-Step Unipolar Drive
- High-Efficiency, High-Speed PWM
- Dual PWM Current Control (2-Phase)
- Programmable PWM Current Control
- Low Component Count PWM Drive
- Low Internal Power Dissipation
- Heat Sinking (Normally) Unnecessary
- Electrically Isolated Power Tab
- Logic IC- and µP-Compatible Inputs
- Machine-Insertable Package
Description
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 advances power multi-chip modules (PMCMsTM) toward the complete integration of motion control. Highly automated manufacturing techniques 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.
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 networks. The RC components limit the OFF interval and control current decay. Inputs are compatible with 5 V logic and microprocessors.
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| SLA7024M | 18-pin SIP | Yes | -- | -20 °C to 85 °C | Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor. | ||
| SLA7026M | 18-pin SIP | Yes | -- | -20 °C to 85 °C | Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor. | ||
| SMA7029M | 15-pin SIP | Yes | -- | -20 °C to 85 °C | not for new design | Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor. |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.