Data Sheet 28210.10B SLA7060M THRU SLA7062M UNIPOLAR STEPPER-MOTOR TRANSLATOR/DRIVERS 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 (PMCM). 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 users 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. ABSOLUTE MAXIMUM RATINGS Half-, quarter-, eighth-, and sixteenth-step operation are externally Driver Supply Voltage, V ................ 46 V BB selectable for the SLA7060/61/62M. Half-step excitation alternates Load Supply Voltage, V .................. 46 V M between the one-phase and two-phase modes (AB-B-AB-A-AB-B-AB- Output Current, I O A), providing an eight-step sequence. SLA7060M ................................. 1.0 A* The Series SLA7060M is supplied in a 21-pin single in-line power- SLA7061M ................................. 2.0 A* tab package with leads formed for vertical mounting (suffix LF2102). SLA7062M ................................. 3.0 A* The tab is at ground potential and needs no insulation. For high-current Logic Supply Voltage, V ............... 7.0 V DD Logic Input Voltage Range, or high-frequency applications, external heat sinking may be required. V .......................... -0.3 V to V + 0.3 V I DD This device is rated for continuous operation between -20C and Sense Voltage, V ........................ 2.0 V S +85C. Reference Input Voltage Range, V ............................... -0.3 V to V + 0.3 V REF DD Package Power Dissipation, P ....................................... See Graph D FEATURES Junction Temperature, T ............ +150C J To 3 A Output Rating Operating Temperature Range, Internal Sequencer for Microstepping Operation T ................................. -20C to +85C A PWM Constant-Current Motor Drive Storage Temperature Range, Cost-Effective, Multi-Chip Solution T ............................... -30C to +150C S 100 V, Avalanche-Rated NMOS * Output current rating may be limited by duty cycle, Low r NMOS Outputs DS(on) ambient temperature, and heat sinking. Under any set of Advanced, Improved Body Diodes conditions, do not exceed the specified current rating or Inputs Compatible with 3.3 V or 5 V Control Signals junction temperature. Sleep Mode Internal filtering provides protection against transients Internal Clamp Diodes during the first 1 s of the current-sense pulse. Always order by complete part number, e.g., SLA7060MLF2102 . Sanken Power Devices from Allegro MicroSystems Motor DriversSLA7060M THRU SLA7062M UNIPOLAR STEPPER-MOTOR TRANSLATOR/DRIVERS Functional block diagram Recommended operating conditions Load Supply Voltage, V ......................... 10 to 44 V BB Logic Supply Voltage, V ................... 3.0 V to 5.5 V DD Reference Input Voltage, V ............. 0.1 V to 1.0 V REF Tab Temperature (no heat sink), T ................. <90C T 115 Northeast Cutoff, Box 15036 2 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 2003, 2005, 2007 Allegro MicroSystems, Inc. Motor Drivers