L99SM81V Datasheet | STMicroelectronics

Programmable stepper motor driver for automotive applications with micro-stepping and stall detection - Production data Features - AEC-Q100 qualified - Stepper motor driver with up to 1.35 A current capability - Programmable Step 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 4.1 interface for control and diagnostics Applications Bipolar 2 phase stepper motor driver for automotive applications like adaptive front light systems or projectors for head-up displaying Description The L99SM81V is an automotive grade integrated driver for bipolar two-phase stepper motors capable of current controlled microstepping with programmable amplitude. The device Features a 5 V voltage regulator to supply external sensors. The integrated Serial Peripheral...