L99SM81V

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Programmable Stepper Motor Driver for Automotive Applications with Micro-Stepping and Stall Detection

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Overview

Product overview

Description

Description

The L99SM81V is an automotive grade integrated driver for bipolar two-phase stepper motors capable of current controlled micro-stepping with programmable amplitude. The device features a 5 V voltage regulator to supply external sensors.

The integrated Serial Peripheral Interface (SPI) makes it possible to adjust device parameters, control all operating modes and read out diagnostic information. Digital I/Os are also optionally usable for more flexible and reliable application control.

  • All features

    • AEC-Q100 qualified
    • Stepper motor driver with up to 1.35 A current capability
    • Programmable stepping mode:
      • Full step, Half step, Mini step, 1/8 Micro step, 1/16 Micro step
    • Current regulation by integrated PWM control with fully integrated current sensing
    • Equivalent 10 bit resolution on current regulation loop:
      • Two 4-bit programmable full scale current amplitudes: one for RUN and one for HOLD mode
      • 6-bit DAC for reference current generation (whatever programmed full scale amplitude)
    • 4 programmable decay modes:
      • Slow-mode, mixed-mode and 2x automatically selected decay-modes
    • 3x programmable inputs for direct control of step clock, direction, hold and step modes
    • 1x programmable analog output for Tj measurement or band-gap reference
    • 2x programmable digital outputs for internally generated PWM ON duty cycles, error signals, coils voltage measurement synchronization signals
    • Programmable MOSFETs switching speed: four options for EMC and power dissipation trade-off optimization
    • PWM frequency wobbling for reduction of conducted EM energy
    • Outputs protection and diagnosis (open load, short to battery, short to GND)
    • Integrated ADC for coil voltage measurement and stall detection
    • 5 V low drop voltage regulator short-circuit protected
    • Very low current consumption in standby mode (typ. 10 µA)
    • Thermal warning and shutdown
    • ST SPI 4.0 interface for control and diagnostics

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
ECOPACK 1: Initial grade to identify European RoHS compliant products.
ECOPACK 2: New grade to identify brominated chlorinated and antimony oxide flame retardant free products.
ECOPACK 3: Halogen free RoHS exemptions free products.
(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Budgetary PriceMarketing description of the package type.Storage method used to contain product.Main country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.