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Related Links:

Datasheets:
SLA7060M thru SLA7062M: Unipolar Stepper-Motor Translator/Drivers (PDF)

Selection Guides:
Power Motor Drivers - Unipolar Stepper

when this product is updated

Press Releases:
SLA706xM:Allegro MicroSystems Introduces Two-Phase Unipolar Microstepping Motor Driver Family

SLA7060M, SLA7061M, and SLA7062M
Unipolar Stepper-Motor Translator/Drivers

Features

• To 3 A Output Rating
• Internal Sequencer for Microstepping Operation
• PWM Constant-Current Motor Drive
• Cost-Effective, Multi-Chip Solution
• 100 V, Avalanche-Rated NMOS Outputs
• Low rDS(on) NMOS Outputs (150 milli-ohms typical)
• Advanced, Improved Body Diodes
• Inputs Compatible with 3.3 V or 5 V Control Signals
• Sleep Mode
• Internal Clamp Diodes

Description

Combining low-power CMOS logic with high-current, high-voltage power FET outputs, the Series SLA7060M translator/drivers provide complete control and drive for a two-phase unipolar stepper motor with internal fixed off time and pulse-width modulation (PWM) control of the output current in a power multi-chip module (PMCMT). There are no phase-sequence tables, high-frequency control lines, or complex interfaces to program.

The CMOS logic section provides the sequencing logic, direction, control, synchronous/asynchronous PWM operation, and a "sleep" function. The minimum CLOCK input is an ideal fit for applications where a complex P is unavailable or overburdened. TTL or LSTTL may require the use of appropriate pull-up resistors to ensure a proper input-logic high. For PWM current control, the maximum output current is determined by the user's selection of a reference voltage and sensing resistor. The NMOS outputs are capable of sinking up to 1, 2, or 3 A (depending on device) and withstanding 46 V in the off state. Clamp diodes provide protection against inductive transients. Special power-up sequencing is not required.

Half-, quarter-, eighth-, and sixteenth-step operation are externally selectable for the SLA7060/61/62M. Half-step excitation alternates between the one-phase and two-phase modes (A-AB-B-AB-A-AB-B-AB), providing an eight-step sequence.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
SLA7060MLF2102	21-pin DIP	Yes	--	-20 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
SLA7061MLF2102	21-pin DIP	Yes	--	-20 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
SLA7062MLF2102	21-pin DIP	Yes	--	-20 °C to  85 °C	new	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.